SpringBoot加入拦截器过滤请求

2023-01-12 21:59:03 by 极墨笔记 in SpringBoot

新建一个Interceptor命令放置拦截器类

在Interceptor命令下新建一个MyInterceptor类，实现HandlerInterceptor接口

package com.zeromemos.Interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("这里执行控制器方法前的拦截方法");
        return true;//true放行，false拦截
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("这里执行控制器方法后的方法");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("这里执行最后的结束方法，一般用于释放资源");
    }
}

config目录里再加入一个配置类WebConfig，实现WebMvcConfigurer接口

package com.zeromemos.config;

import com.zeromemos.Interceptor.MyInterceptor;
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 {
    /**
     * 添加拦截器
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 对所有访问路径，都通过MyInterceptor类型的拦截器进行拦截
        registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**")
                .excludePathPatterns("/index");//放行/index路径
    }
}

访问http://localhost:9001/会进入拦截器

访问http://localhost:9001/index不会进入拦截器

拦截器执行流程

目录