adminloginfilter.java

一套购物车项目。电子商务系统。实现了前台和后台的业务逻辑。

package com.softfz.jn0708.filter;

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.HttpSession;

/**
 * 系统登录用户过滤器
 * @author student
 *
 */
public class AdminLoginFilter implements Filter{

	public void init(FilterConfig arg0) throws ServletException {
		
		
	}

	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest)req;
		HttpSession session = request.getSession();
			
		if(session.getAttribute("adminuname")!=null){
			
			chain.doFilter(req,res);
		}else{

			request.getRequestDispatcher("/admin/login.jsp").forward(req,res);
		}
		
	}
	
	public void destroy() {
	
	}

}