JAVA发送xml格式的接口请求

/**
    * 
    * @param urlStr  接口地址
    * @param xmlInfo   xml格式参数数据
    * @return
    */
   public static String sendMsgXml(String urlStr, String xmlInfo) {
       StringBuffer buffer = new StringBuffer();
       try {
           URL url = new URL(urlStr);
           URLConnection con = url.openConnection();
           con.setDoOutput(true);
           OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream(), "utf-8");
           System.out.println("Exedata start\n" + xmlInfo + "\nExe end");
           out.write(xmlInfo);
           //out.write(new String(request.getBytes("ISO-8859-1")));
           out.flush();
           out.close();
           BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(), "utf-8"));
           String line = "";
           for (line = br.readLine(); line != null; line = br.readLine()) {
               buffer.append(line);
           }
       } catch (MalformedURLException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
       return buffer+"";
   }