Filter过滤器 不登陆无法访问其他页面

package com.cscy.Filter;

import java.io.IOException;

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 javax.servlet.http.HttpSession;

public class LoginFilter implements Filter {

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,    
			FilterChain chain) throws IOException, ServletException {  
		// 获得在下面代码中要用的request,response,session对象   
		HttpServletRequest servletRequest = (HttpServletRequest) request;   
		HttpServletResponse servletResponse = (HttpServletResponse) response;   
		HttpSession session = servletRequest.getSession();   
		// 获得用户请求的URI   
		String path = servletRequest.getRequestURI();   
		//System.out.println(path);   
		// 从session里取信息   
		String name = (String) session.getAttribute("name");     
		// 登陆页面无需过滤   
		if(path.indexOf("/login.jsp") > -1) {    
			chain.doFilter(servletRequest, servletResponse);    
			return;   }   
		// 判断如果没有取到信息,就跳转到登陆页面   
		if (name == null || "".equals(name)) {    
			// 跳转到登陆页面    
			servletResponse.sendRedirect("/dome/login.jsp");  
			} else {    
				// 已经登陆,继续此次请求    
				chain.doFilter(request, response);   				
		}
	}

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

}

　　

<!-- 配置 登陆 过滤器 -->
    <filter>
        <filter-name>login</filter-name>
        <filter-class>com.cscy.Filter.LoginFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>login</filter-name>
        <url-pattern>*.jsp</url-pattern>
<!--此处写/*代表浏览器地址栏中的所有请求都会被拦截 包括css文件和js文件 .jsp这是仅拦截以.jsp结尾的请求 -->
    </filter-mapping>