Java怎么實現后臺發送及接收json數據

這篇文章主要介紹Java怎么實現后臺發送及接收json數據，文中介紹的非常詳細，具有一定的參考價值，感興趣的小伙伴們一定要看完！

具體的內容如下:

1.java后臺給指定接口發送json數據

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="服務器異常";
            }
    } catch (Exception e) {
      System.out.println("請求異常");
      throw new RuntimeException(e);
    }
    System.out.println("result=="+result);
    return result;
  }
}

2.java后臺接收json數據

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("進入=====================");
        //后臺接收
        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);
        }
        //響應
        Map<String,Object> jsonObject = new HashMap<String, Object>(); //創建Json對象
        jsonObject.put("username", "張三");     //設置Json對象的屬性
        jsonObject.put("password", "123456");
        return jsonObject;
    }
}

運行testOne之后將json數據發送到authentication接口，接收的數據如圖：

testOne中main方法返回的數據如圖：

以上是“Java怎么實現后臺發送及接收json數據”這篇文章的所有內容，感謝各位的閱讀！希望分享的內容對大家有幫助，更多相關知識，歡迎關注億速云行業資訊頻道！