springboot配置filter

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

@WebFilter(urlPatterns = "/*")
public class MyFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // 初始化操作
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        // 在请求到达 Controller 之前执行的代码
        System.out.println("Filter is invoked before request reaches Controller");

        chain.doFilter(request, response); // 继续处理请求

        // 在响应返回客户端之前执行的代码
        System.out.println("Filter is invoked after response is returned");
    }

    @Override
    public void destroy() {
        // 销毁操作
    }
}

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class FilterConfig {

    @Bean
    public FilterRegistrationBean<MyFilter> loggingFilter(){
        FilterRegistrationBean<MyFilter> registrationBean = new FilterRegistrationBean<>();
        registrationBean.setFilter(new MyFilter());
        registrationBean.addUrlPatterns("/*"); // 设置过滤的 URL 模式
        registrationBean.setOrder(1); // 设置 Filter 的执行顺序
        return registrationBean;
    }
}