springboot写Filter

最新推荐文章于 2025-06-16 13:04:13 发布

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#springboot #filter

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本文介绍如何在SpringBoot项目中配置并使用自定义过滤器。通过实现Filter接口创建过滤器类，并利用@WebServletComponentScan注解激活过滤器。该文详细展示了过滤器的初始化、请求处理及销毁过程。

1、创建一个实现Filter接口的过滤器类，并添加springboot注解。

package sibd.filter;

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

/**
 * Description:
 * Cteated by yangbin
 * 2018/4/26 9:27
 */
@WebFilter(urlPatterns = "/*")
public class FilterController implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.print("initing...");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.print("doFilter...");
    }

    @Override
    public void destroy() {
        System.out.print("destroied...");
    }
}

2、在应用程序入口上添加注解@ServletComponentScan

package sibd;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;

/**
 * Description:
 * Cteated by wangpeng
 * 2018/4/16 10:57
 */
@SpringBootApplication
@ServletComponentScan
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class,args);
    }
}