JAVA http发送json数据

http://www.cnblogs.com/snake-hand/p/3157332.html

http://rain-2372.iteye.com/blog/1860431

package com.test;

import java.io.BufferedReader; 
import java.io.DataOutputStream; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.io.UnsupportedEncodingException; 
import java.net.HttpURLConnection; 
import java.net.MalformedURLException; 
import java.net.URL; 
import net.sf.json.JSONObject;

public class AppAddTest {

public static final String ADD_URL = "http://localhost:16000/app/add";

public static void appadd() {

try { 
            //创建连接 
            URL url = new URL(ADD_URL); 
            HttpURLConnection connection = (HttpURLConnection) url 
                    .openConnection(); 
            connection.setDoOutput(true); 
            connection.setDoInput(true); 
            connection.setRequestMethod("POST"); 
            connection.setUseCaches(false); 
            connection.setInstanceFollowRedirects(true); 
            connection.setRequestProperty("Content-Type", 
                    "application/x-www-form-urlencoded");

connection.connect();

//POST请求 
            DataOutputStream out = new DataOutputStream( 
                    connection.getOutputStream()); 
            JSONObject obj = new JSONObject(); 
            obj.element("app_name", "asdf"); 
            obj.element("app_ip", "10.21.243.234"); 
            obj.element("app_port", 8080); 
            obj.element("app_type", "001"); 
            obj.element("app_area", "asd");

out.writeBytes(obj.toString()); 
            out.flush(); 
            out.close();

//读取响应 
            BufferedReader reader = new BufferedReader(new InputStreamReader( 
                    connection.getInputStream())); 
            String lines; 
            StringBuffer sb = new StringBuffer(""); 
            while ((lines = reader.readLine()) != null) { 
                lines = new String(lines.getBytes(), "utf-8"); 
                sb.append(lines); 
            } 
            System.out.println(sb); 
            reader.close(); 
            // 断开连接 
            connection.disconnect(); 
        } catch (MalformedURLException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        } catch (UnsupportedEncodingException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        } catch (IOException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
        }

}

public static void main(String[] args) { 
        appadd(); 
    }

} 
转http://www.blogjava.net/jlins-you/archive/2012/06/22/381290.html