loginfilter.java

该系统可以实现邮件的收发

package com.filter;

import java.io.IOException;
import javax.servlet.*;

//判断姓名密码是否存在的过滤器
public class LoginFilter implements Filter {

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

	public void doFilter(ServletRequest req, ServletResponse resp,
			FilterChain chain) throws IOException, ServletException {
		
//		HttpServletRequest request = (HttpServletRequest)req;
//		String url = request.getRequestURI().toUpperCase();
//
//		RequestDispatcher rd = null;
//		if (url.indexOf("LOGIN.DO") != -1) {
//			chain.doFilter(req, resp);
//		}
//
//		else {
//			HttpSession session = request.getSession(false);
//			if (session == null) {
//				rd = request.getRequestDispatcher("/Index/login.jsp");
//				rd.forward(req, resp);
//			} else {
//				Users user = (Users) session.getAttribute("users");
//				
//				if (user != null && user.getUserName() != null) {
//					chain.doFilter(req, resp);
//				} else {
//					rd = request.getRequestDispatcher("/Index/login.jsp");
//					rd.forward(req, resp);
//				}
//			}
//		}
		chain.doFilter(req, resp);
	}

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