@Controller

@RequestMapping("/messageProcessing")

public class WechatPushController {

    @Autowired

    private WechatPushService wechatPushService;

    @Autowired

    private WechatOAuthService wechatOAuthService;

    @Autowired

    private WechatUserService wechatUserService;

    /**

     * 确认请求来自微信服务器

     */

    @RequestMapping(value="/doGet",method=RequestMethod.GET)

    public void doGet(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        // 微信加密签名

        String signature = request.getParameter("signature");

        // 时间戳

        String timestamp = request.getParameter("timestamp");

        // 随机数

        String nonce = request.getParameter("nonce");

        // 随机字符串

        String echostr = request.getParameter("echostr");  

        PrintWriter out = response.getWriter();

        // 通过检验signature对请求进行校验，若校验成功则原样返回echostr，表示接入成功，否则接入失败

        if (WechatSignUtil.checkSignature(signature, timestamp, nonce)) {

            out.print(echostr);

        }

        out.close();

        out = null;

    }

    /**

     * 处理微信服务器发来的消息

     */

    @RequestMapping(value="/doGet",method=RequestMethod.POST)

    public void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        // 将请求、响应的编码均设置为UTF-8（防止中文乱码）

        request.setCharacterEncoding("UTF-8");

        response.setCharacterEncoding("UTF-8");

        // 调用核心业务类接收消息、处理消息

        String respMessage = wechatPushService.processRequest(request);

        // 响应消息

        PrintWriter out = response.getWriter();

        out.print(respMessage);

        out.close();

    }