Spring一步到位精通拦截器

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

package com.example.demo.Interceptor;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class EasyLogControllerInterceptor implements HandlerInterceptor {
    /**
     * 在controller调用之前执行
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        System.out.println(request.getRequestURI()+"开始执行");
        return true;
    }
    /**
     * 在controller调用中执行
     */
    public void postHandle(
            HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)
            throws Exception {
        System.out.println(request.getRequestURI()+"执行中");
    }
    /**
     * 在controller调用后执行
     */
    public void afterCompletion(
            HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        System.out.println(request.getRequestURI()+"执行结束");
     }
}

package com.example.demo.Interceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class IntercepterConfig implements WebMvcConfigurer {
    @Autowired
    private EasyLogControllerInterceptor easyLogControllerInterceptor;
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //addPathPatterns用于添加拦截路径
        //excludePathPatterns用于添加不拦截的路径
        registry.addInterceptor(easyLogControllerInterceptor).addPathPatterns("/hello");
    }
    //此方法用于配置静态资源路径
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**").addResourceLocations("classpath:/my/");
    }
}