Java实现后台发送及接收json数据的方法示例

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;

   }

}

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;

     }

}