Login登陆过滤器

/*
 * Copyright (C) NLS
 * 担当者：朱慧鵬
 * 更新者：朱慧鵬
 * 最終更新日：2012/12/20
 */
package com.nls.dispatch.common;

import java.io.IOException;
import java.io.PrintWriter;

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;

/**
 * 機能名称：ログインフィルタ
 * 機能概要：ログインフィルタ基本機能
 * バージョン：１．０
 */
public class LoginFilter implements Filter{

    @Override
    public void destroy() {
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException {}

    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {

        // リクエスト
        HttpServletRequest re = (HttpServletRequest) request;
        HttpServletResponse res = (HttpServletResponse) response;
        HttpSession session = re.getSession();
        // ログインユーザー
        String loginUser  = (String)session.getAttribute("userCode");
        String servicePath = re.getServletPath();

        if(loginUser == null){
            if (servicePath.toLowerCase().endsWith(".js")
                    || servicePath.toLowerCase().endsWith(".css")
                    || servicePath.toLowerCase().endsWith(".jpg")
                    || servicePath.toLowerCase().endsWith(".gif")
                    || servicePath.toLowerCase().endsWith(".png")
                    || servicePath.toLowerCase().endsWith(".bmp")
                    || servicePath.toLowerCase().endsWith(".htc")
                    || "/LoginK!check.action".equalsIgnoreCase(servicePath)
                    || "/Login!login.action".equalsIgnoreCase(servicePath)
                    || "/jsp/common/top.jsp".equalsIgnoreCase(servicePath)
                    || "/Menu.action".equalsIgnoreCase(servicePath)
                    || "/jsp/common/default.jsp".equalsIgnoreCase(servicePath)
                    || "/jsp/Login.jsp".equalsIgnoreCase(servicePath)
                    ) {
                chain.doFilter(request, response);
            }else{
//                res.sendRedirect(re.getContextPath());
                 PrintWriter out = res.getWriter();
                 out.println("<script type='text/javascript'>window.parent.location='"+re.getContextPath()+"'</script>");
                return;
            }
        } else {
            chain.doFilter(request, response);
        }
    }
}