JavaWeb: localhost 将您重定向的次数过多

JavaWeb开发遇到到的问题：

该网页无法正常运作
localhost 将您重定向的次数过多。
尝试清除 Cookie.
ERR_TOO_MANY_REDIRECTS

原因是Filter把自己也给过滤了：
我这里是对所有页面都进行过滤，不满足条件则跳转到login.jsp，然而忘了给login.jsp加判断了

package top.hsocode.Filters;

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 StudentLoginFilter implements Filter {

    private FilterConfig config;
    @Override
    public void destroy() {
        // TODO Auto-generated method stub

    }

    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
            throws IOException, ServletException {
        // TODO Auto-generated method stub
        HttpServletRequest request = (HttpServletRequest)arg0;
        HttpServletResponse response = (HttpServletResponse)arg1;
        HttpSession session = request.getSession();


        String noLoginPaths = config.getInitParameter("noLoginPaths");
        if (noLoginPaths != null) {
            String[] strArray = noLoginPaths.split(";");
            for (int i = 0; i < strArray.length; i++) {
                if (strArray[i] == null || "".equals(strArray[i])) {
                    continue;
                }
                if(request.getRequestURI().indexOf(strArray[i]) != -1){
                    arg2.doFilter(arg0, arg1);
                    return;
                }
            }
        }


        if (session.getAttribute("email") != null) {
            arg2.doFilter(arg0, arg1);
        }else {
            response.sendRedirect(request.getContextPath() + "/login.jsp");
        }
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException {
        // TODO Auto-generated method stub
        config = arg0;
    }

}

所以做以下修改就可以了

package top.hsocode.Filters;

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 StudentLoginFilter implements Filter {

    private FilterConfig config;
    @Override
    public void destroy() {
        // TODO Auto-generated method stub

    }

    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
            throws IOException, ServletException {
        // TODO Auto-generated method stub
        HttpServletRequest request = (HttpServletRequest)arg0;
        HttpServletResponse response = (HttpServletResponse)arg1;
        HttpSession session = request.getSession();


        String noLoginPaths = config.getInitParameter("noLoginPaths");
        if (noLoginPaths != null) {
            String[] strArray = noLoginPaths.split(";");
            for (int i = 0; i < strArray.length; i++) {
                if (strArray[i] == null || "".equals(strArray[i])) {
                    continue;
                }
                if(request.getRequestURI().indexOf(strArray[i]) != -1){
                    arg2.doFilter(arg0, arg1);
                    return;
                }
            }
        }
        /*修改部分*/
        if(request.getRequestURI().indexOf("/login.jsp") > -1){
            arg2.doFilter(arg0, arg1);
        } else if (session.getAttribute("email") != null) {
            arg2.doFilter(arg0, arg1);
        }else {
            response.sendRedirect(request.getContextPath() + "/login.jsp");
        }
        /*修改部分*/
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException {
        // TODO Auto-generated method stub
        config = arg0;
    }

}

现在就可以正常访问了