一文详解Java拦截器与过滤器的使用

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.7.RELEASE</version>
    </parent>

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

package com.test.filtertest.inter;

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 TestInter1 implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("TestInter1 preHandle...");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("TestInter1 postHandle...");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("TestInter1 afterCompletion...");
    }
}

package com.test.filtertest.config;

import com.test.filtertest.inter.TestInter1;
import com.test.filtertest.inter.TestInter2;
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.WebMvcConfigurer;


@Configuration
public class WebConfig implements WebMvcConfigurer {

    @Autowired
    private TestInter1 testInter1;

    @Autowired
    private TestInter2 testInter2;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //默认
@WebFilter(filterName = "TestFilter1", urlPatterns = "
@Configuration
public class FilterConfig {

    @Bean
    public FilterRegistrationBean testFilter1() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        Filter testFilter1 = new TestFilter1();
        filterRegistrationBean.setFilter(testFilter1);
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.setName("testFilter1");
        filterRegistrationBean.setOrder(2);//指定过滤顺序，数值越小优先级越高
        return filterRegistrationBean;
    }

    @Bean
    public FilterRegistrationBean testFilter2() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        Filter testFilter2 = new TestFilter2();
        filterRegistrationBean.setFilter(testFilter2);
        filterRegistrationBean.setName("testFilter2");
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.setOrder(1);//指定过滤顺序，数值越小优先级越高
        return filterRegistrationBean;
    }
}