content: package com.ansitech.weixin4j.example.controller;
  
  import java.io.IOException;
  import javax.servlet.ServletInputStream;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.weixin4j.WeixinException;
  import org.weixin4j.spi.HandlerFactory;
  import org.weixin4j.spi.IMessageHandler;
  import org.weixin4j.util.TokenUtil;
  
  /**
   * 微信开发者接入
   *
   * @author yangqisheng
   */
  @Controller
  @RequestMapping("/weixin/jieru")
  public class WeixinJieruController {
  
      //开发者接入验证
      @RequestMapping(method = RequestMethod.GET)
      public void get(HttpServletRequest request, HttpServletResponse response) throws IOException {
          //消息来源可靠性验证
          String signature = request.getParameter("signature");// 微信加密签名
          String timestamp = request.getParameter("timestamp");// 时间戳
          String nonce = request.getParameter("nonce");       // 随机数
          //Token为weixin4j.properties中配置的Token
          String token = TokenUtil.get();
          //1.验证消息真实性
          //http://mp.weixin.qq.com/wiki/index.php?title=验证消息真实性
          //成为开发者验证
          String echostr = request.getParameter("echostr");
          //确认此次GET请求来自微信服务器，原样返回echostr参数内容，则接入生效，成为开发者成功，否则接入失败
          if (TokenUtil.checkSignature(token, signature, timestamp, nonce)) {
              response.getWriter().write(echostr);
          }
      }
  
      //接收微信消息
      @RequestMapping(method = RequestMethod.POST)
      public void post(HttpServletRequest request, HttpServletResponse response) throws IOException {
          //消息来源可靠性验证
          String signature = request.getParameter("signature");// 微信加密签名
          String timestamp = request.getParameter("timestamp");// 时间戳
          String nonce = request.getParameter("nonce");       // 随机数
          //Token为weixin4j.properties中配置的Token
          String token = TokenUtil.get();
          //确认此次GET请求来自微信服务器，原样返回echostr参数内容，则接入生效，成为开发者成功，否则接入失败
          if (!TokenUtil.checkSignature(token, signature, timestamp, nonce)) {
              //消息不可靠，直接返回
              response.getWriter().write("");
              return;
          }
          //用户每次向公众号发送消息、或者产生自定义菜单点击事件时，响应URL将得到推送
          try {
              response.setCharacterEncoding("UTF-8");
              response.setContentType("text/xml");
              //获取POST流
              ServletInputStream in = request.getInputStream();
              //非注解方式，依然采用消息处理工厂模式调用
              IMessageHandler messageHandler = HandlerFactory.getMessageHandler();
              //处理输入消息，返回结果
              String xml = messageHandler.invoke(in);
              //返回结果
              response.getWriter().write(xml);
          } catch (IOException | WeixinException ex) {
              response.getWriter().write("");
          }
      }
  }
  