springbloot过滤器方式二

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本文详细介绍了一个使用Spring Boot实现的Filter示例，包括MyFilter2的实现、配置类FilterConfig的设置以及Filter2Controller的测试。文章展示了如何通过FilterRegistrationBean注册过滤器，设置过滤路径，并在Controller中进行登录和中心页面的响应。

Filter实现

package com.cc.boot.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;

public class MyFilter2 implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("进入到filter222222222 = " + servletRequest);
        filterChain.doFilter(servletRequest,servletResponse);
    }
}

Filter配置类

package com.cc.boot.config;

import com.cc.boot.filter.MyFilter2;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class FilterConfig {

    @Bean
    FilterRegistrationBean myFilterRegistrationBean() {
        //注册过滤器
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new MyFilter2());
        //添加过滤器路径,如果是user,下的一级,写一个*号,2个过滤会失效.例如:/user/**
        filterRegistrationBean.addUrlPatterns("/user/*");
        return filterRegistrationBean;
    }


}

Filter测试类

package com.cc.boot.controller;

import com.cc.boot.model.User;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;

@Controller
@Slf4j
public class Filter2Controller {


    @RequestMapping(value = "/user/filter")
    public @ResponseBody
    Object login(HttpServletRequest request) {
        User user = new User();
        user.setId("1009");
        user.setUserName("张飞机");
        request.getSession().setAttribute("user", user);
        return "登录成功";
    }


    @RequestMapping(value = "/center")
    public @ResponseBody
    Object center() {
        log.info("被拦截了吗-----------------------");
        return "登录后可以访问center";
    }


}

localhost:8080//user/filter