loginfilter.java

来自「J2ee开发的 人事管理系统 使用oracle数据库 myeclips平台开」· Java 代码 · 共 43 行

package com.galaxy.filter;

import java.io.IOException;
import java.util.HashMap;

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;

public class LoginFilter implements Filter{
	private String loginPath = "";
	
	public void destroy() {
		loginPath = "";
	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
	throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest)arg0;
		HashMap upHashMap = (HashMap)request.getSession().getAttribute("upHashMap");
		
		if(upHashMap == null || upHashMap.get("U_LoadName") == null
				|| "".equals((String)upHashMap.get("U_LoadName")))
		{
			request.getRequestDispatcher(loginPath).forward(arg0, arg1);
		}
		else
		{
			arg2.doFilter(arg0, arg1);
		}
	}

	public void init(FilterConfig arg0) throws ServletException {
		loginPath = arg0.getInitParameter("loginPath");				
	}

}