public static String httpURLConnectionPOST (String url, String data) {
        StringBuffer strBf = new StringBuffer();
        try {
            URL realUrl = new URL(url);
            //將realUrl以 open方法返回的urlConnection  連接強(qiáng)轉(zhuǎn)為HttpURLConnection連接  (標(biāo)識(shí)一個(gè)url所引用的遠(yuǎn)程對(duì)象連接)
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();// 此時(shí)cnnection只是為一個(gè)連接對(duì)象,待連接中
            //設(shè)置連接輸出流為true,默認(rèn)false (post請(qǐng)求是以流的方式隱式的傳遞參數(shù))
            connection.setDoOutput(true);
            //設(shè)置連接輸入流為true
            connection.setDoInput(true);
            //設(shè)置請(qǐng)求方式為post
            connection.setRequestMethod("POST");
            //post請(qǐng)求緩存設(shè)為false
            connection.setUseCaches(false);
            //設(shè)置該HttpURLConnection實(shí)例是否自動(dòng)執(zhí)行重定向
            connection.setInstanceFollowRedirects(true);
            //設(shè)置請(qǐng)求頭里面的各個(gè)屬性 (以下為設(shè)置內(nèi)容的類(lèi)型,設(shè)置為經(jīng)過(guò)urlEncoded編碼過(guò)的from參數(shù))
            connection.setRequestProperty("Content-Type", "application/json;charset=utf-8");
            //建立連接 (請(qǐng)求未開(kāi)始,直到connection.getInputStream()方法調(diào)用時(shí)才發(fā)起,以上各個(gè)參數(shù)設(shè)置需在此方法之前進(jìn)行)
            connection.connect();
            //創(chuàng)建輸入輸出流,用于往連接里面輸出攜帶的參數(shù),(輸出內(nèi)容為?后面的內(nèi)容)
            DataOutputStream dataout = new DataOutputStream(connection.getOutputStream());
            String query = data.toString();
            //將參數(shù)輸出到連接
            dataout.write(query.getBytes("UTF-8"));
            // 輸出完成后刷新并關(guān)閉流
            dataout.flush();
            dataout.close(); // 重要且易忽略步驟 (關(guān)閉流,切記!)
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
            String lines;
            while ((lines = reader.readLine()) != null) {
                lines = new String(lines.getBytes(), "utf-8");
                strBf.append(lines);
            }
            reader.close();
            connection.disconnect();
            System.out.println("返回?cái)?shù)據(jù)："+strBf.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return strBf.toString();
    }

  public static void main(String[] args) {
        String strJson = httpURLConnectionPOST("URL","data");
        JSONObject jsonObject = JSONObject.parseObject(strJson);
        System.out.println("json"+jsonObject);
    }