HttpURLConnection

POST连接
URL url = new URL(apiUrl + pStr);
   HttpURLConnection conn = (HttpURLConnection) url.openConnection();
   conn.setRequestMethod("POST");
   conn.setDoOutput(true);
   conn.connect();

   out = conn.getOutputStream();
   out.write(postData, 0, postData.length);
   out.flush();

   if (conn.getResponseCode() == 200) {
    int len = 0;
    byte[] buf = new byte[1024];
    in = conn.getInputStream();
    while ((len = in.read(buf)) > 0) {
     result += new String(buf, 0, len);
    }
   } else {
    result = "请求错误,code=" + conn.getResponseCode();
   }
GET连接
URL url = new URL(apiUrl);
   HttpURLConnection conn = (HttpURLConnection) url.openConnection();
   conn.setRequestMethod("GET");//POST
   conn.setDoOutput(false);//true
   conn.connect();
   String result = "";
   if (conn.getResponseCode() == 200) {
    int len = 0;
    byte[] buf = new byte[1024];
    InputStream in = conn.getInputStream();
    
    try {
     while ((len = in.read(buf)) > 0) {
      result += new String(buf, 0, len,"GBK");
     }
    } catch (Exception e) {
     Logger.error("失败code="+code,e);
    }finally{
     if(null != in){
      try {
       in.close();
      } catch (Exception e) {
       
      }finally{
       in = null;
      }
     }
    }
   }

com.alibaba.fastjson.JSON
JSONObject tmp = JSON.parseObject(result);