过滤器的使用

package cn.hopetesting.filter;

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

/**
 * @author newcityman
 * @date 2019/9/12 - 21:29
 */
//@WebFilter(value = "/index.jsp",dispatcherTypes=DispatcherType.REQUEST)
//@WebFilter(value = "/index.jsp",dispatcherTypes=DispatcherType.FORWARD)
@WebFilter(value = "/index.jsp",dispatcherTypes={DispatcherType.REQUEST,DispatcherType.FORWARD})
public class FilterDemo05 implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        System.out.println("filterDemo5被执行了。。。。");
        chain.doFilter(req, resp);
    }

    public void init(FilterConfig config) throws ServletException {

    }

}