springBoot(filter配置)

最新推荐文章于 2025-05-25 18:27:18 发布

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本文介绍如何在SpringBoot项目中配置自定义过滤器，包括创建过滤器配置类，实现过滤器接口，以及在控制台输出过滤器执行信息。通过示例代码展示了过滤器的注册和使用。

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1.创建filter配置类：

package com.csy.springbootstart.Configuration;
import org.apache.catalina.filters.RemoteIpFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

@Configuration
public class WebConfiguration {
    @Bean
    public RemoteIpFilter remoteIpFilter() {
        return new RemoteIpFilter();
    }

    @Bean
    public FilterRegistrationBean testFilterRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new MyFilter());
        registration.addUrlPatterns("/*");
        registration.addInitParameter("name", "value");
        registration.setName("MyFilter");
        registration.setOrder(1);
        return registration;
    }

}

package com.csy.springbootstart.Configuration;


import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

public class MyFilter implements Filter {
    @Override
    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain filterChain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) srequest;
        System.out.println("this is MyFilter,url :"+request.getRequestURI());
        filterChain.doFilter(srequest, sresponse);
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException {
    }
}

2.通过前端访问

3.控制台输出

this is MyFilter,url :/hello
this is MyFilter,url :/favicon.ico