package?com.dongbest.servlet;

import?java.io.IOException;
import?java.util.ArrayList;
import?java.util.List;

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;
/*
?*?過濾器
?*/
public?class?LoginFilter?implements?Filter?{
	//?需要定義系統頁面訪問中可放行的連接
	private?List?list?=?new?ArrayList（）;

	public?void?init（FilterConfig?arg0）?throws?ServletException?{
	list.add（“/index.jsp“）;
		list.add（“/LoginAction.do“）;

	}

	public?void?doFilter（ServletRequest?servletRequest
			ServletResponse?servletResponse?FilterChain?chain）
			throws?IOException?ServletException?{
		HttpServletRequest?request?=?（HttpServletRequest）?servletRequest;
		HttpServletResponse?response?=?（HttpServletResponse）?servletResponse;
		//?1、獲取頁面中的訪問的路徑連接
		String?path?=?request.getServletPath（）;
		if?（list?!=?null?&&?list.contains（path））?{
			//?如果頁面中獲取的訪問連接于定義的可放行的連接一致，則放行
			chain.doFilter（request?response）;
			return;
		}
		//?2、從session（flag）對象中獲取當前登錄的用戶標志
		object?flag?=?request.getSession（）.getAttribute（“flag“）;
		if?（flag?!=?null）?{
			//?如果從session中獲取的用戶對象不為空，則放行
			chain.doFilter（request?response）;
			return;
		}
		//?如果不滿足條件1和2，則不能放行，回到系統的登錄頁面
		response.sendRedirect（request.getContextPath（）?+?“/“）;
	}

	public?void?destroy（）?{

	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????834??2014-01-21?12:40??FilterLearn\.classpath

?????文件???????1044??2014-01-21?12:40??FilterLearn\.project

?????文件????????503??2014-01-21?12:40??FilterLearn\.settings\.jsdtscope

?????文件????????364??2014-01-21?12:40??FilterLearn\.settings\org.eclipse.jdt.core.prefs

?????文件????????487??2014-01-21?12:40??FilterLearn\.settings\org.eclipse.wst.common.component

?????文件????????345??2014-01-21?12:40??FilterLearn\.settings\org.eclipse.wst.common.project.facet.core.xml

?????文件?????????49??2014-01-21?12:40??FilterLearn\.settings\org.eclipse.wst.jsdt.ui.superType.container

?????文件??????????6??2014-01-21?12:40??FilterLearn\.settings\org.eclipse.wst.jsdt.ui.superType.name

?????文件???????2379??2014-01-21?12:40??FilterLearn\build\classes\com\dongbest\servlet\LoginFilter.class

?????文件???????1284??2014-01-21?12:40??FilterLearn\build\classes\com\dongbest\web\action\HomeAction.class

?????文件???????1792??2014-01-21?12:40??FilterLearn\build\classes\com\dongbest\web\action\LoginAction.class

?????文件???????1040??2014-01-21?12:40??FilterLearn\build\classes\項目說明.txt

?????文件???????1782??2014-01-21?12:40??FilterLearn\src\com\dongbest\servlet\LoginFilter.java

?????文件????????838??2014-01-21?12:40??FilterLearn\src\com\dongbest\web\action\HomeAction.java

?????文件???????1158??2014-01-21?12:40??FilterLearn\src\com\dongbest\web\action\LoginAction.java

?????文件???????1040??2014-01-21?12:40??FilterLearn\src\項目說明.txt

?????文件????????392??2014-01-21?12:40??FilterLearn\WebContent\index.jsp

?????文件?????????39??2014-01-21?12:40??FilterLearn\WebContent\meta-INF\MANIFEST.MF

?????文件????????382??2014-01-21?12:40??FilterLearn\WebContent\WEB-INF\page\home.jsp

?????文件????????363??2014-01-21?12:40??FilterLearn\WebContent\WEB-INF\page\index.jsp

?????文件????????907??2014-01-21?12:40??FilterLearn\WebContent\WEB-INF\web.xml

?????目錄??????????0??2014-01-21?12:40??FilterLearn\build\classes\com\dongbest\web\action

?????目錄??????????0??2014-01-21?12:40??FilterLearn\build\classes\com\dongbest\servlet

?????目錄??????????0??2014-01-21?12:40??FilterLearn\build\classes\com\dongbest\web

?????目錄??????????0??2014-01-21?12:40??FilterLearn\src\com\dongbest\web\action

?????目錄??????????0??2014-01-21?12:40??FilterLearn\build\classes\com\dongbest

?????目錄??????????0??2014-01-21?12:40??FilterLearn\src\com\dongbest\servlet

?????目錄??????????0??2014-01-21?12:40??FilterLearn\src\com\dongbest\web

?????目錄??????????0??2014-01-21?12:40??FilterLearn\build\classes\com

?????目錄??????????0??2014-01-21?12:40??FilterLearn\src\com\dongbest

............此處省略14個文件信息