java中的json怎么利用post请求进行发送

这篇文章给大家介绍java中的JSON怎么利用post请求进行发送，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。

方法一：

package main.utils;import java.io.*;import java.net.HttpURLConnection;import java.net.URL;public class HttpUtilTest {  Log log = new Log(this.getClass());//初始化日志类    public String sendPost(String url,String Params)throws IOException{    OutputStreamWriter out = null;    BufferedReader reader = null;    String response="";    try {      URL httpUrl = null; //HTTP URL类 用这个类来创建连接      //创建URL      httpUrl = new URL(url);      //建立连接      HttpURLConnection conn = (HttpURLConnection) httpUrl.openConnection();      conn.setRequestMethod("POST");      conn.setRequestProperty("Content-Type", "application/json");      conn.setRequestProperty("connection", "keep-alive");      conn.setUseCaches(false);//设置不要缓存      conn.setInstanceFollowRedirects(true);      conn.setDoOutput(true);      conn.setDoInput(true);      conn.connect();      //POST请求      out = new OutputStreamWriter(          conn.getOutputStream());      out.write(Params);      out.flush();      //读取响应      reader = new BufferedReader(new InputStreamReader(          conn.getInputStream()));      String lines;      while ((lines = reader.readLine()) != null) {        lines = new String(lines.getBytes(), "utf-8");        response+=lines;      }      reader.close();      // 断开连接      conn.disconnect();      log.info(response.toString());    } 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(reader!=null){        reader.close();      }    }    catch(IOException ex){      ex.printStackTrace();    }  }    return response;  }}