backgroundfilter.java

java开发购物车+网上书城

package com.xaccp.aj3q8073.controller;

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 com.xaccp.aj3q8073.vo.AdminInfoVo;

public class BackgroundFilter implements Filter {

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

	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request= (HttpServletRequest)arg0;
		HttpServletResponse response=(HttpServletResponse) arg1;
		
		AdminInfoVo name= (AdminInfoVo) request.getSession().getAttribute("name");
		if(name==null){
			response.sendRedirect(request.getContextPath()+"/adminlogin.jsp");
//			request.getRequestDispatcher("/adminlogin.jsp").forward(request, response);
			return;
		}else{
			chain.doFilter(request, response);
		}
	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub
//		arg0.getServletContext();
	}

}