为什么我微信访问会告诉我redirect_uri 错误,但控制台能显示welogin的doget方法已经进入

@WebServlet("/wxLogin")
public class LoginServlet extends HttpServlet {
    //引导用户进行授权
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

System.out.printf("in /WxAuth/wxLogin");

控制台有打印