通过httpClient4.5.3发送POST请求，并添加请求头参数以及json格式请求参数

1、使用如下jar包

或者添加maven依赖

org.apache.httpcomponents

httpclient

4.5.3

该maven对应如下jar

2、通过HttpClient发送POST请求，并构造出请求json字符串，并添加请求头参数

请求json

{

"conditions": [

{

"studentName": "张三",

"studentSn": 1

}

],

"pager": {

"pageIndex": 6,

"pageSize": 20

}

}

3、客户端代码：

package com.myapp.core;

import java.nio.charset.Charset;

import java.util.ArrayList;

import java.util.List;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.StringEntity;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.util.EntityUtils;

import com.alibaba.fastjson.JSON;

import com.myapp.dto.Page;

import com.myapp.dto.Parameters;

import com.myapp.dto.StudentInfoDto;

public class HttpClientApplication {

public static Parameters getParams() {

// 构造请求参数

Page pager = new Page();

pager.setPageIndex(6);

pager.setPageSize(20);

StudentInfoDto dto = new StudentInfoDto();

dto.setStudentSn(1);

dto.setStudentName("张三");

Parameters parameters = new Parameters();

List conditions = new ArrayList();

conditions.add(dto);

parameters.setConditions(conditions);

parameters.setPager(pager);

return parameters;

}

public static void main(String[] args) {

Parameters parameters = getParams();

String params = JSON.toJSONString(parameters);

System.out.println(params);

String url = "http://localhost:8080/myapp/jsonRequest?studentId=20100723";

HttpClient httpClient = null;

HttpPost postMethod = null;

HttpResponse response = null;

try {

httpClient = HttpClients.createDefault();

postMethod = new HttpPost(url);//传入URL地址

//设置请求头

postMethod.addHeader("Content-type", "application/json; charset=utf-8");

postMethod.addHeader("X-Authorization", "AAAA");//设置请求头

//传入请求参数

postMethod.setEntity(new StringEntity(params, Charset.forName("UTF-8")));

response = httpClient.execute(postMethod);//获取响应

int statusCode = response.getStatusLine().getStatusCode();

System.out.println("HTTP Status Code:" + statusCode);

if (statusCode != HttpStatus.SC_OK) {

System.out.println("HTTP请求未成功！HTTP Status Code:" + response.getStatusLine());

}

HttpEntity httpEntity = response.getEntity();

String reponseContent = EntityUtils.toString(httpEntity);

EntityUtils.consume(httpEntity);//释放资源

System.out.println("响应内容：" + reponseContent);

} catch (Exception e) {

e.printStackTrace();

}

}

}

4、服务端代码

对应的controller中的如下：

@ResponseBody

@RequestMapping(value="jsonRequest",method=RequestMethod.POST)

public StudentInfo getStudentInfoBysn(

String studentId,

@RequestBody(required=false) Parameters parameters,

@RequestHeader(value="X-Authorization",required=false) String authorization){

System.out.println("获取的studentId为：" +studentId);

System.out.println("获取的请求参数parameters为：" + parameters);

System.out.println("获取的请求头X-Authorization为：" + authorization);

System.out.println("后续处理数据...");

BigDecimal studentSn = parameters.getConditions().get(0).getStudentSn();

StudentInfo studentInfo = studentService.getStudentInfoBySn(studentSn);

System.out.println("获取数据库查询结果：" + studentInfo);

return studentInfo;

}