传入接收POST请求的接口地址，以及接口需要的JSON参数获取返回的JSON信息

/**
     * 往指定的URL发送POST请求。
     * @param url
     * @param content
     * @return
     * @throws IOException
     */
    public static String sendMessage(String url,String content) throws IOException{
        URL uRL;
        HttpURLConnection conn;
        OutputStream outputStreamWriter = null;
        BufferedReader bufferedReader = null;
        try {
            uRL = new URL(url); 
            conn = (HttpURLConnection)uRL.openConnection();
            //设置连接超时。
            conn.setConnectTimeout(ContextUtil.getConnectTimeout());
            //设置读取超时。
            conn.setReadTimeout(ContextUtil.getReadTimeout());
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true)
            conn.setRequestProperty("Content-Type","application/json;charset=UTF-8");
　　　　　　　byte[] sendContents = content.getBytes("utf-8");

 conn.setRequestProperty("Content-Length",String.valueOf(sendContents.length)); conn.setRequestProperty("User-Agent",""); outputStreamWriter=conn.getOutputStream(); outputStreamWriter.write(sendContents, 0, sendContents.length); outputStreamWriter.flush(); outputStreamWriter.close(); bufferedReader = new BufferedReader(new InputStreamReader(conn.getInputStream())); StringBuffer response = new StringBuffer(); String line; while((line = bufferedReader.readLine()) != null){ response.append(line); } String result = response.toString(); return result; } catch (MalformedURLException e) { return ""; } catch (IOException e) { String msg=ExceptionUtils.getStackTrace(e); log.error(msg); return ""; } finally{ if(outputStreamWriter!=null) outputStreamWriter.close(); if(bufferedReader!=null) bufferedReader.close(); } }