网站导航怎么做外链武汉seo管理

   java编写向接口POST 一个Jason请求，要求 post的方法要单独封装一个类   (有其他类调用post方法，参数最好是json体和链接地址，需要得出返回结果并打印返回信息和http状态码，只打印返回结果和状态码，其他的不能打印出)

 

import java.io.BufferedReader;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.io.OutputStreamWriter; 
import java.io.InputStream;
import java.io.InputStreamReader;//import java.net.MalformedURLException;
import net.sf.json.JSONObject;
//import java.io.InputStreamReader;
//import java.io.UnsupportedEncodingException;
//import java.io.BufferedReader;
//import java.io.DataOutputStream;public class confirmSendJson {/** * 发送HttpPost请求 *  * @param strURL *            服务地址 * @param params *            json字符串,例如: "{ \"id\":\"12345\" }" ;其中属性名必须带双引号<br/> * @return 成功:返回json字符串<br/> */  final static String addr_url = "http://xxxx.com/v1/api/payRequest";  final static String params ="{\"channelCode\": \"01\","+"\"platformCode\": \"03\","+"\"tradeNo\": \"1474878291690\","+"\"subject\": \"打赏\","+"\"payAmount\": 1,"+"\"notifyUrl\": \"http://xxxx.com/v1/test/notify\","+"\"returnUrl\": \"http://xxxx.com/v1/test/notify/sync\","+"\"expire\": 300,"+"\"extra\": \"hello world\","+"\"openId\": \"oSlbct45e-fTbFJOtZvZjV5gNKBE\","+"\"sign\": \"7BB370F84FD481BC758836BB7919BBEF\"}";public static String post(String addr_url, String params){String result="";BufferedReader in = null;OutputStreamWriter out=null;try {//创建连接URL url = new URL(addr_url);HttpURLConnection connection = (HttpURLConnection) url.openConnection();connection.setDoOutput(true);connection.setDoInput(true);connection.setRequestMethod("POST");connection.setUseCaches(false);//post不能保存缓存connection.setInstanceFollowRedirects(true);connection.setRequestProperty("Accept", "application/json"); // 设置接收数据的格式  connection.setRequestProperty("Content-Type", "application/json"); // 设置发送数据的格式 
connection.connect();//POST请求out = new OutputStreamWriter(  connection.getOutputStream(), "UTF-8"); // utf-8编码  
            out.append(params);  out.flush();  out.close();  Map<String,List<String>> map = connection.getHeaderFields();for (String key : map.keySet()){System.out.println(key + "------>" +map.get(key));}//读取响应in = new BufferedReader(new InputStreamReader(connection.getInputStream()));String line;while ((line = in.readLine()) != null) {result += line;}} catch (Exception e) {System.out.println("发送 POST 请求出现异常！"+e);e.printStackTrace();}//使用finally块来关闭输出流、输入流finally{try{if(out!=null){out.close();}if(in!=null){in.close();}}catch(IOException ex){ex.printStackTrace();}}return result;}public static void main(String[] args) {  String result=null;result= post(addr_url, params); System.out.println(result);  }  }