本文实例讲述了Java实现后台发送及接收json数据的方法。分享给大家供大家参考，具体如下：
本篇博客试用于编写java后台接口以及两个项目之间的接口对接功能；
具体的内容如下:
1.java后台给指定接口发送json数据
package com.utils;import java.io.BufferedReader;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.HttpURLConnection;import java.net.URL;import net.sf.json.JSONObject;public class testOne { public static void main(String[] args) { JSONObject jsobj1 = new JSONObject(); JSONObject jsobj2 = new JSONObject(); jsobj2.put("deviceID", "112"); jsobj2.put("channel", "channel"); jsobj2.put("state", "0"); jsobj1.put("item", jsobj2); jsobj1.put("requestCommand", "control"); post(jsobj1,"http://192.168.3.4:8080/HSDC/test/authentication"); } public static String post(JSONObject json,String path) { String result=""; try { HttpClient client=new DefaultHttpClient(); HttpPost post=new HttpPost(url); post.setHeader("Content-Type", "appliction/json"); post.addHeader("Authorization", "Basic YWRtaW46"); StringEntity s=new StringEntity(json.toString(), "utf-8"); s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "appliction/json")); post.setEntity(s); HttpResponse httpResponse=client.execute(post); InputStream in=httpResponse.getEntity().getContent(); BufferedReader br=new BufferedReader(new InputStreamReader(in, "utf-8")); StringBuilder strber=new StringBuilder(); String line=null; while ((line=br.readLine())!=null) { strber.append(line+"/n"); } in.close(); result=strber.toString(); if(httpResponse.getStatusLine().getStatusCode()!=HttpStatus.SC_OK){ result="服务器异常"; } } catch (Exception e) { System.out.println("请求异常"); throw new RuntimeException(e); } System.out.println("result=="+result); return result; }} 2.java后台接收json数据
package com.controller;import java.io.IOException;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.util.HashMap;import java.util.Map;import org.springframework.http.MediaType;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RestController;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;@RestController@RequestMapping("test")public class TestConttroller{ @Resource protected HttpServletRequest request; @RequestMapping(value="authentication",produces = MediaType.APPLICATION_JSON_VALUE,method = RequestMethod.POST) public Map<String,Object> getString() throws UnsupportedEncodingException, IOException{ System.out.println("进入====================="); //后台接收 InputStreamReader reader=new InputStreamReader(request.getInputStream(),"UTF-8"); char [] buff=new char[1024]; int length=0; while((length=reader.read(buff))!=-1){ String x=new String(buff,0,length); System.out.println(x); } //响应 Map<String,Object> jsonObject = new HashMap<String, Object>(); //创建Json对象 jsonObject.put("username", "张三"); //设置Json对象的属性 jsonObject.put("password", "123456"); return jsonObject; }} 运行testOne之后将json数据发送到authentication接口，接收的数据如图：
testOne中main方法返回的数据如图：
至此java后台发送及接收json数据代码也就完成了
希望本文所述对大家java程序设计有所帮助。
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