filterall.java

主要是用net开发的 用mvc模式 有酒店管理

package com.apache.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.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class FilterAll implements Filter {

	public void destroy() {

	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) arg0;
		HttpServletResponse response = (HttpServletResponse) arg1;
		HttpSession ss = request.getSession(false);

		
		
		if (ss == null ) {
			if(request.getRequestURI().contains("login"))
			{
				arg2.doFilter(arg0, arg1);//向下执行
			}
			else
			{
				response.sendRedirect("login.jsp");
			}
		}
		else
		{
			arg2.doFilter(arg0, arg1);//向下执行
		}
	}

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

	}

}