spring boot使用拦截器

package com.example.demo.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 拦截器类
 */
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("已经进去了登陆拦截器...");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}

package com.example.demo.config;

import com.example.demo.interceptor.LoginInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * 配置类
 */
@Configuration
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {

        //需要拦截的路径
        String[] addPathPatterns = {
                "/boot/**"
        };
        //不拦截路径
        String[] excludePathPatterns = {
                "/boot/hello"
        };

        //注册登录拦截器
        InterceptorRegistration interceptorRegistration = registry.addInterceptor(new LoginInterceptor());
        interceptorRegistration.addPathPatterns(addPathPatterns);//添加拦截路径
        interceptorRegistration.excludePathPatterns(excludePathPatterns);//添加不拦截路径
    }
}