public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 request.setCharacterEncoding("UTF-8");
 response.setCharacterEncoding("UTF-8"); 
 
  String msg_signature = request.getParameter("msg_signature"); 
  
  String timestamp = request.getParameter("timestamp"); 
  
  String nonce = request.getParameter("nonce"); 
  
  InputStream inputStream = request.getInputStream(); 
  String postData = IOUtils.toString(inputStream, "UTF-8"); 
  System.out.println(postData); 
  
  String msg = ""; 
  WXBizMsgCrypt wxcpt = null; 
  try { 
   wxcpt = new WXBizMsgCrypt(sToken , sEncodingAESKey , sCorpID ); 
   msg = wxcpt.DecryptMsg(msg_signature, timestamp, nonce, postData); 
  } catch (AesException e) { 
   e.printStackTrace(); 
  } 
  System.out.println("msg=" + msg); 
   
  //获取接口访问凭证
  String accessToken = CommonUtil.getToken("wxe510946434680dab", "eWTaho766INvp4e1MCsz1mHYuT2DAleb62REQ3vsFizhY4vtmwZpKweuxUVh33G0").getAccessToken();
  try {
 @SuppressWarnings("unused")
 boolean flag = ChatService1.sendMessage(accessToken,msg);
 } catch (Exception e) {
 e.printStackTrace();
 }
} 

public class ChatService1 {

 public static boolean sendMessage(String accessToken,String msg) throws Exception{
 boolean flag = false;
 Map<String, String> requestMap = MessageUtil.parseXml(msg); 
 // 发送者
 String fromUserName = requestMap.get("FromUserName");
 // 消息类型
 String msgType = requestMap.get("MsgType");
 
 if(msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_TEXT)){//如果是文本客服消息
 String Content = requestMap.get("Content");//文本消息的消息内容
 //组装文本客服消息,参数1：用户id；参数2：发送的内容
 jsonMsg = AdvancedUtil.makeTextCustomMessage("lishehe|zhisheng|zhangwenyuan|lixinjiang", Content);
 }else if(msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_IMAGE)){//发送的是图片
 String mediaId = requestMap.get("MediaId");
 jsonMsg = AdvancedUtil.makeImageCustomMessage("lishehe|zhisheng|zhangwenyuan|lixinjiang", mediaId);
 }else if(msgType.equals(MessageUtil.REQ_MESSAGE_TYPE_VOICE)){
 String mediaId = requestMap.get("MediaId");
 jsonMsg= AdvancedUtil.makeVoiceCustomMessage("lishehe|zhisheng|zhangwenyuan|lixinjiang", mediaId);
 }
 flag = AdvancedUtil.sendCustomMessage(accessToken, jsonMsg);
 return flag;
 }
}

public class AdvancedUtil {
 private static Logger log = LoggerFactory.getLogger(AdvancedUtil.class);

 /**
 * 组装发送文本消息
 * @return
 */
 public static String makeTextCustomMessage(String openId, String content) {
 content = content.replace("\"", "\\\"");
 String jsonMsg = "{\"touser\":\"%s\",\"msgtype\":\"text\",\"agentid\":\"%s\",\"text\":{\"content\":\"%s\"}}";
 return String.format(jsonMsg, openId, 14,content);
 }

 /**
 * 组装发送图片消息
 * 
 * @return
 */
 public static String makeImageCustomMessage(String openId, String mediaId) {
 String jsonMsg = "{\"touser\":\"%s\",\"msgtype\":\"image\",\"agentid\":\"%s\",\"image\":{\"media_id\":\"%s\"}}";
 return String.format(jsonMsg, openId,14, mediaId);
 }

 /**
 * 组装发送语音消息
 * 
 * @return
 */
 public static String makeVoiceCustomMessage(String openId, String mediaId) {
 String jsonMsg = "{\"touser\":\"%s\",\"msgtype\":\"voice\",\"agentid\":\"%s\",\"voice\":{\"media_id\":\"%s\"}}";
 return String.format(jsonMsg, openId,14, mediaId);
 }