struts2在web.xml中配置自定义的Filter后访问所有页面都报404错误

iii_am_haomiaozi 2018-10-25 04:26:34

struts2框架下的工程，在web.xml中配置struts2的核心Filter，工程运行一切正常。
但是自己写了一个过滤器AccessFilter（功能是不允许未登录用户访问除登录和注册页面外的其他任何页面），
将其配置到web.xml中后，访问工程中的任何页面都报404错误。
这是为什么呢？网上查了好久，也还是解决不了，谁能帮帮我

引入的包：

web.xml文件：



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

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

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

	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

	id="WebApp_ID" version="3.0">

	<display-name>struts-prj3</display-name>

	<welcome-file-list>

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

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

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

		<welcome-file>default.html</welcome-file>

		<welcome-file>default.htm</welcome-file>

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

	</welcome-file-list>

    <!-- 定义自定义过滤器AccessFilter -->

	<filter>

		<filter-name>accessFilter</filter-name>

		<filter-class>cn.edu.zjut.filters.AccessFilter</filter-class>

	</filter>

	<!-- 让AccessFilter过滤所有SP页面 -->

	<filter-mapping>

		<filter-name>accessFilter</filter-name>

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

	</filter-mapping>

	<!-- 定义Struts2 的核心Filter -->

	<filter>

		<filter-name>struts2</filter-name>

		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>

	</filter>

	<!-- 让Struts2 的核心Filter 拦截所有请求 -->

	<filter-mapping>

		<filter-name>struts2</filter-name>

		<url-pattern>/*</url-pattern>

	</filter-mapping>

</web-app>

AccessFilter.java文件：



package cn.edu.zjut.filters;



import java.io.IOException;

import java.nio.file.DirectoryStream.Filter;

import javax.servlet.*;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;



public  class AccessFilter implements Filter<Object>

{

	public FilterConfig config;

	public void destroy() {

		// TODO Auto-generated method stub

		this.config=null;

	}

	public void init(FilterConfig filterConfig) throws ServletException {

		// TODO Auto-generated method stub

		config = filterConfig;  

	}



	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain filterChain) throws IOException, ServletException 

	{

		System.out.println("Access Filter executed!");

		HttpServletRequest request = (HttpServletRequest)arg0;

		HttpServletResponse response = (HttpServletResponse)arg1; 

		HttpSession session = request.getSession(); 

		if(session.getAttribute("user")== null && request.getRequestURI().indexOf("login.jsp")==-1 && request.getRequestURI().indexOf("register.jsp")==-1)

		{ 

			response.sendRedirect("login.jsp");

		    return ;

        }

		filterChain.doFilter(arg0, arg1);

		

	}

	@Override

	public boolean accept(Object entry) throws IOException {

		// TODO Auto-generated method stub

		return false;

	}

}