帮忙看看为什么没有输出

源自：3-1 [Java Web] 第一个过滤器案例

帮忙看看为什么没有输出

//Filter类

package com.Filter;

import java.io.IOException;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

public class MyfirstFilter implements javax.servlet.Filter {

@Override

public void destroy() {

System.out.println("销毁过滤器");

}

@Override

public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)

throws IOException, ServletException {

System.out.println("开始调用doFilter方法");

arg2.doFilter(arg0, arg1);

System.out.println("结束调用doFilter方法");

}

@Override

public void init(FilterConfig arg0) throws ServletException {

System.out.println("过滤器初始化");

}

//web.xml配置

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5"

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

<display-name></display-name>

<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list>

<filter-name>FirstFilter</filter-name>

<filter-class>com.Filter.MyfirstFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>FirstFilter</filter-name>

<url-pattern>/index.jsp</url-pattern>

</filter-mapping>

</web-app>

//index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>Insert title here</title>

</head>

<body>

<hr>

</body>

</html>

提问者：Workar 2017-08-17 11:14

帮忙看看为什么没有输出

个回答