public static String getSuiteTokenToJson2(String ticket){
    String returnStr = HttpRequestUtil.sendPost("https://qyapi.weixin.qq.com/cgi-bin/service/get_suite_token",
            "suite_id="+WxCfg.WX_COMP_SECRET+"&suite_secret="+WxCfg.WX_COMP_SECRET+"&suite_ticket="+ticket);
    return returnStr;
}

public static String sendPost(String url, String param) {
     PrintWriter out = null;
     BufferedReader in = null;
     StringBuilder result = new StringBuilder();
     try {
         log.info("\n\n=====================sendPost 请求报文：========================="+
                 "\n>>url:"+url+
                 "\n>>param:"+param+
                 "\n===================================================================\n");
         URL realUrl = new URL(url);
         // 打开和URL之间的连接
         URLConnection conn = realUrl.openConnection();
         // 设置通用的请求属性
         conn.setRequestProperty("accept", "*/*");
         conn.setRequestProperty("connection", "Keep-Alive");
         conn.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
         conn.setRequestProperty("Accept-Charset", "UTF-8");
         conn.setRequestProperty("contentType", "UTF-8");
         // 发送POST请求必须设置如下两行
         conn.setDoOutput(true);
         conn.setDoInput(true);
         // 获取URLConnection对象对应的输出流
         out = new PrintWriter(conn.getOutputStream());
         // 发送请求参数
         out.print(param);
         // flush输出流的缓冲
         out.flush();
         // 定义BufferedReader输入流来读取URL的响应
         in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
         String line;
         while ((line = in.readLine()) != null) {
             result.append(line);
         }
     } catch (Exception e) {
         og.error("发送 POST 请求出现异常！" + e.getMessage());
         result = new StringBuilder("{\"resCode\":\"1\",\"errCode\":\"1001\",\"resData\":\"\"}");
         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();
         }
     }
     log.info("\n\n=====================sendPost 响应报文：========================="+
             "\n>>url:"+url+
             "\n>>报文体:"+result.toString()+
             "\n===================================================================\n");
     return result.toString();
 }