springmvc add interceptor

The springmvc.xml configuration is as follows:

Except for all interfaces under sysFile and the loginUser interface under user, all other interfaces will be processed by the interceptor UserInterceptor

<mvc:interceptors>
    <mvc:interceptor>
        <mvc:mapping path="/**" />
        <mvc:exclude-mapping path="/sysFile/**" />
        <mvc:exclude-mapping path="/users/loginUser.do" />
        <bean class="com.test.interceptor.UserInterceptor" />
     </mvc:interceptor>
</mvc:interceptors>

public class UserInterceptor extends HandlerInterceptorAdapter{
    
    @Autowired
    private IUsersService usersService;
    
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        
        try {
            request.setCharacterEncoding("UTF-8");
        } catch (UnsupportedEncodingException e) {
            return false;
        } 
　　　　　//Get the incoming userId from the foreground
        String userId = request.getParameter("userId" ); 
　　　　 //Get the token passed in by the foreground
        String token = request.getParameter("token" ); 
　　　　 //Get user information from database according to userId
        UsersVo usersVo = usersService.findUserById(userId);
        if(usersVo == null){
            return false;//拦截
        }
        
　　　　 //Compare the token passed in by the foreground with the token obtained from the data
         if (usersVo.getToken() == null || "".equals(usersVo.getToken()) || ! usersVo.getToken().equals(token )){
             return  false ;//Intercept
        } 
　　　　　//Do not intercept
         return  true ;
    }
}