import java.io.IOException;

import java.util.Date;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Component;

@Component // 表明作为spring的一个bean

public class TimeFilter implements Filter {

    private HttpServletRequest request;

    private HttpServletResponse response;

    @Override

    public void destroy() {

    }

    @Override

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)

            throws IOException, ServletException {

        this.request = (HttpServletRequest) servletRequest;

        this.response = ((HttpServletResponse) servletResponse);

        long start = new Date().getTime();

        // 过滤器主要逻辑，整个处理流程

        chain.doFilter(request, response);

        System.out.print(request.getRequestURL());

        System.out.println(" time filter 耗时:" + (new Date().getTime() - start)+"ms");

        ;

    }

    @Override

    public void init(FilterConfig arg0) throws ServletException {

    }

}