Java 中使用 OkHttpClent 请求接口 get方式 post方式
学习记录，不喜勿喷什么是OkHttp
一般在Java平台上，我们会使用Apache HttpClient作为Http客户端，用于发送 HTTP 请求，并对响应进行处理。比如可以使用http客户端与第三方服务(如SSO服务)进行集成，当然还可以爬取网上的数据等。OKHttp与HttpClient类似，也是一个Http客户端，提供了对 HTTP/2 和 SPDY 的支持，并提供了连接池，GZIP 压缩和 HTTP 响应缓存功能。
OkHttp优点
（1）支持HTTP2/SPDY（SPDY是Google开发的基于TCP的传输层协议，用以最小化网络延迟，提升网络速度，优化用户的网络使用体验）
（2）socket自动选择最好路线，并支持自动重连，拥有自动维护的socket连接池，减少握手次数，减少了请求延迟，共享Socket,减少对服务器的请求次数
（3）基于Headers的缓存策略减少重复的网络请求
（4）拥有Interceptors轻松处理请求与响应（自动处理GZip压缩）
OkHttp功能
（1）一般的get请求
（2）一般的post请求
（3）基于Http的文件上传
（4）文件下载
（5）上传下载的进度回调
（6）加载图片
（7）支持请求回调，直接返回对象、对象集合
（8）支持session的保持
（9）支持自签名网站https的访问，提供方法设置下证书就行
（10）支持取消某个请求
测试数据接口
package com.waves.controller;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RestController
@RequestMapping("/dataApi")
public class ResponseDataController {
@GetMapping("/getData")
public Map<String,Object> getData(@RequestParam("pageIndex")String pageIndex){
Map<String,Object>map = new HashMap<>();
map.put("username","小明");
map.put("password","123456");
map.put("age","18");
map.put("endSchool","中国北京大学");
List<Map<String,Object>> list = new ArrayList<>();
list.add(map);
Map<String,Object>map2 = new HashMap<>();
map2.put("total",list.size());
map2.put("code",200);
map2.put("data",list);
return map2;
}
@PostMapping("/postData")
public Map<String,Object> postData(@RequestBodyMap<String,Object> params){
Map<String,Object>map = new HashMap<>();
map.put("username","小红");
map.put("password","123456");
map.put("age","18");
map.put("school","中国北京大学");
List<Map<String,Object>> list = new ArrayList<>();
list.add(map);
Map<String,Object>map2 = new HashMap<>();
map2.put("total",list.size());
map2.put("code",200);
map2.put("data",list);
return map2;
}
}OkHttp POST请求接口
package com.waves.controller;
import com.alibaba.fastjson.JSONObject;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import org.springframework.web.bind.annotation.*;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
@RestController
@RequestMapping("/okHttpApi")
public class OkHttpController {
@PostMapping("/okHttpPost")
public Map<String,Object> okHttpPost(@RequestBody Map<String,Object> params){
try {
//json字符串的两种形式
String k ="{\n" +
"\t\"pageIndex\": \"1\",\n" +
"\t\"pageSize\": \"10\",\n" +
"\t\"userName\": \"xiaoming\"\n" +
"}";
JSONObject json2 =new JSONObject();
json2.put("pageIndex","1");
json2.put("pageSize","20");
json2.put("userName","xiaoming");
//创建一个OkHttpClient
OkHttpClient client = new OkHttpClient();
//设置请求头
MediaType mediaType = MediaType.parse("application/json");
//请求体
okhttp3.RequestBody requestBody = okhttp3.RequestBody.create(mediaType,k);
//创建一个request
Request request = new Request.Builder()
.post(requestBody)
.url("http://localhost:8080/dataApi/postData")
.addHeader("content-type","application/json")
.build();
//获得返回
Response response = client.newCall(request).execute();
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
//获取返回值
String responseData = response.body().string();
//将json字符串转为JSONObject
JSONObject data = JSONObject.parseObject(responseData);
//将jsonObject 转为Map
Map<String,Object> map2 = data.toJavaObject(Map.class);
return map2;
}catch (Exception e){
return new HashMap<>();
}
}
}OkHttp GET方式请求接口
@GetMapping("/okHttpGet")
public Map<String,Object> okHttpGet(@RequestBody Map<String,Object> params){
try {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.get()
.url("http://localhost:8080/dataApi/getData?pageIndex=1")
// .addHeader("content-type","application/json")
.build();
Response response = client.newCall(request).execute();
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
//获取返回值
String responseData = response.body().string();
//将json字符串转为JSONObject
JSONObject data = JSONObject.parseObject(responseData);
//将jsonObject 转为Map
Map<String,Object> map2 = data.toJavaObject(Map.class);
return map2;
}catch (Exception e){
return new HashMap<>();
}
}
项目所需pom（依赖）
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.waves</groupId>
<artifactId>waves_okhttp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>waves_okhttp</name>
<description>Okhtp project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<spring-boot.version>2.3.7.RELEASE</spring-boot.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.72</version>
</dependency>
<dependency>
<groupId>com.squareup.okhttp3</groupId>
<artifactId>okhttp</artifactId>
<version>4.9.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.3.7.RELEASE</version>
<configuration>
<mainClass>com.waves.WavesOkhttpApplication</mainClass>
</configuration>
<executions>
<execution>
<id>repackage</id>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
免责声明：如果侵犯了您的权益，请联系站长，我们会及时删除侵权内容，谢谢合作！
页:
[1]