Javaweb02-jsp

1.1<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>Jsp中脚本片段，声明，表达式

1.1.1<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>脚本片段<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>

1. <%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>

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1.1.2<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>声明<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>

1. [/code][size=4]1.1.3<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>表达式[/size]
3. [code]<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>

复制代码

1.2<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>注释

1.2.1<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>html注释

1. [/code][size=4]1.2.2<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>jsp注释[/size]
3. [code]

复制代码

1.3<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>jsp<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>本质

jsp本质是servlet；
jsp编译后或变成xxx_jsp.java,xxx_jsp.class;
jsp编译后放的目录：工作空间\.metadata.plugins\org.eclipse.wst.server.core\tmp0\work\Catalina\localhost\myWeb01\org\apache\jsp
1.3.1编译后的路径


1.3.2<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>编译后的代码


3、JSP9大内置对象

1. final<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>javax.servlet.http.HttpServletRequest<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>request;<%<%= <%@ include file="top.jsp"%> <%@ include 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file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>exception<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>异常对象

复制代码

4、乱码问题

4.1<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>请求乱码问题

4.1.1<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>post请求乱码

1. request.setCharacterEncoding("utf-8");

复制代码

4.1.2<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>get请求乱码问题

tomcat8以后默认编码格式是utf-8,之前是iso-8859-1,所以所以现在的get请求很少有乱码问题；

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file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include 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file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>UTF-8userName<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>new<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String(userName.getBytes("ISO-8859-1"),"UTF-8");<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>

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4.2<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>响应乱码

1. //设置响应头的编码,页面接收响应的编码，页面以什么编码接收后端响应回来的内容response.setHeader(“Content-Type”,<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>“text/html;charset=UTF-8”);//后端以什么编码响应给前端response.setCharacterEncoding(“UTF-8”);

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5、转发和重定向的区别

5.1<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>转发和重定向

1. //转发到成功页面//转发是客户端行为request.getRequestDispatcher("success.jsp").forward(request,<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>response);//重定向到登录页面//重定向是客户端行为response.sendRedirect("userLogin.jsp");

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5.2<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>跳转资源不同

转发访问的资源仅限于服务内部所有资源，不可以访问外部资源，但是重定向可以（除WIN-INFO之外）；

1. //使用重定向跳转到百度页面<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>可以response.sendRedirect("https://www.baidu.com");//使用重定向跳转到百度页面<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>可以response.sendRedirect("https://www.baidu.com");

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5.3<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>对WEB-INFO的访问不同

转发可以访问到WEB-INFO下的资源，重定向不可以访问到；

1. //使用转发，跳转到WEB-INF安全目录中的页面<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>可以request.getRequestDispatcher("../WEB-INF/OK.jsp").forward(request,<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>response);//使用重定向跳转到WEB-INF安全目录中的页面<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include 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复制代码

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复制代码

5.5<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>总结

转发和重定向的区别（牢记：转发是服务器端行为，重定向是客户端行为）:

• 转发访问的资源仅限于服务内部所有资源，不可以访问外部资源，但是重定向可以（除WIN-INFO之外）；
  
• 转发转发的地址栏显示的地址是首次访问的地址，后续所有的转发操作都是内部实现的，地址栏看不到,只显示第一次请求的地址，但是重定向的地址栏显示的是最后一次的地址栏；
  
• 转发"/"代表的含义不同，转发是交给服务器处理，而重定向是交给浏览器处理，代表站点；
  
• 转发转发会携带请求，不会重新发起请求，全程request对象只用一个；重定向每次都是浏览器发起的，都是一个新的请求，即request对象每次都是新的；
  

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可以转发；
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include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>key)过去请求中存放的数据7、response<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>响应对象

可以重定向；
8、session<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>会话<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>（作用域）

session的会话跟踪机制：

• session是浏览器和服务器之间的一次通话，首次访问任何一个jsp页面，服务端会自动给当前访问的用户创建一个唯一的session对象并将该session对象的唯一标识sessionid返回给浏览器，浏览器拿到该sessionid后，会自动保存到浏览器的内存中,当浏览器再次发起新的请求时，会自动将内存中保存的sessionid作为参数提交到服务端，如：JSESSIONID=6F3973CF90CE1401DA6987D35CB6BD10
  
• 服务端拿到该sessionid，就可以自动获取到对应的那个session对象，进而就可以通过session对象获取用户数据,当浏览器关闭（退出进程），内存中保存的sessionid就自动释放，重新打开浏览器，访问jsp请求到服务器端，由于没有了sessionid，服务器端就不知道session对象是哪个，默认是新用户请求，会重新再创建新的session对象，返回给浏览器端，重复上述操作。
  

方法说明getId()获取sessionIdsession.setAttribute("key","value");存放参数session.getAttribute("keys");获取参数session.invalidate();清除session对象session.removeAttribute("key");移除参数session.setMaxInactiveInterval(10);设置session超时时间,秒8.1session会话清除机制

8.1.1<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>方式1：程序主动清除session对象，session.invalidate();

1. //通知服务器端，立刻删除当前用户的session对象，服务器中对应的session对象就不存在，之前保存的用户信息就无效，下一次就必须登录
2. session.invalidate();

复制代码

8.1.2<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>session.removeAttribute(String<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>key);

1. //<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>方式2：程序主动删除属性，是服务器端session对象中保存的某个属性，session.removeAttribute(String<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>key);session.removeAttribute("sessionUser");

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8.1.3<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>务器主动删除，通过设置服务器端session会话对象的超时时长

1. //<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>方式3：服务器主动删除，通过设置服务器端session会话对象的超时时长，达到时长，自动删除，单位是<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>秒session.setMaxInactiveInterval(10);

复制代码

8.1.4<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>服务器主动删除，通过修改服务器默认session超时时长配置

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<%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>10<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>注意：不是说session对象超时就是30分钟，如果在30分钟内有操作session对象，超时会顺延，只有没有操作到达30分钟，才会删除。

复制代码

9、四大作用域

作用域范围pageContext当前页面request当前请求session当前会话application当前服务器（应用）范围大小：pageContext<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>request<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>session<%<%= <%@ include file="top.jsp"%> <%@ include 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<%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>application；
10、cookie

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<%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>cookie<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include 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<%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>new<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>Cookie("userRem",userName+"-"+userPwd);
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file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>

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12、引入页面

12.1<%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>静态导入

先将页面jsp导入，再将两个页面合成的jsp再编译；（注意变量冲突，引入页面的变量和本页面的变量会冲突）

1. <%<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>String<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>str1<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>=<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>"局部变量";<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>//<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>局部代码段，这里面的代码都是局部的<%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>%><%= <%@ include file="top.jsp"%> <%@ include file="top.jsp"%>//称作jsp表达式，用于将已经声明的变量或者表达式输出到网页上面。 <%@ include file="top.jsp"%>%> <%@ include file="top.jsp"%>

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举例：

1. main.jsp
3. <%@ include file="top.jsp"%>
5. top.jsp
6. <h2>顶部页面</h2>

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先编译你两个页面，再引入页面；（不会产生变量冲突）

1. [/code][b]举例：[/b]
2. [code]main.jsp
4. <jsp:include page="botton.jsp"/>
6. botton.jsp
7. <h2>底部页面</h2>

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被编译后的文件目录：


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