java后台传json到前台 java发送json数据

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：