java后台发送及接收json数据

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 {
        	URL url = new URL(path);
        	HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			// 使用 URL 连接进行输出，则将 DoOutput标志设置为 true  
			conn.setDoOutput(true);  
			conn.setRequestMethod("POST");  
			OutputStreamWriter out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
			// 向服务端发送key = value对
			out.write(json.toString());
			out.flush();
			out.close();
			// 如果请求响应码是200，则表示成功  
			System.out.println("conn=="+conn);
			if (conn.getResponseCode() == 200) {  
			    // HTTP服务端返回的编码是UTF-8,故必须设置为UTF-8,保持编码统一,否则会出现中文乱码  
			    BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
			    System.out.println("in ==="+in );
			    result = in.readLine();  
			    in.close();  
			}  
			conn.disconnect();// 断开连接  
        } 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;

@RestController
@RequestMapping("test")
public class TestConttroller extends BaseController{
	
	@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，希望帮助到你。记得给赞哦！！！

java后台发送及接收json数据

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