adminfilter.java

Java购物车及JSTL的应用

package org.qhit.li.store.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.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class AdminFilter extends HttpServlet implements Filter {

	/**
	 * 
	 */
	private static final long serialVersionUID = 11;

	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) res;
		HttpSession session = request.getSession();
		chain.doFilter(req, res);
		String isLogin = (String) session.getAttribute("isLogin");
		if (isLogin == null) {
			response.sendRedirect("../Stage/AdminLogin.jsp");
		}
	}

	public void init(FilterConfig config) throws ServletException {

	}

}