SpringMVC-01-回顾MVC架构 - ToB企服应用市场:ToB评测及商务社交产业平台

新建一个Maven工程当做父工程！pom依赖！

复制代码

建立一个子Moudle：SpringMVC-01-servlet，添加Web app的支持！

编写一个Servlet类，用来处理用户的请求

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
// 实现Servlet接口
public class HelloServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// 1.获取前端参数
String method = req.getParameter("method");
if (method.equals("add")){
req.getSession().setAttribute("msg","执行add方法");
}
if (method.equals("delete")){
req.getSession().setAttribute("msg","执行delete方法");
}
// 2.调用业务逻辑层
// 3.视图转发或重定向
req.getRequestDispatcher("/WEB-INF/jsp/Hello.jsp").forward(req,resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req,resp);
}
}

复制代码

编写jsp，在WEB-INF目次下新建一个jsp的文件夹，新建Hello.jsp、Form.jsp

在web.xml中注册Servlet

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>com.moondream.servlet.HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping>
</web-app>

复制代码

配置Tomcat，并启动测试