ecportfilter.java

本系统是网上购物的详细代码

package cn.com.tarena.ecport.web.filter;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class ECPortFilter extends HttpFilter {

	@Override
	public void doFilter(HttpServletRequest request,
			HttpServletResponse response, FilterChain chain)
			throws ServletException, IOException {
		HttpSession session = request.getSession(false);

		if (session == null || !("1".equals(session.getAttribute("loginSuccess")))) {
			request.setAttribute("unlogin", "您还没有登录！请先登录");
			request.getRequestDispatcher("/user/login.do").forward(request,response);
		} else {
			chain.doFilter(request, response);
		}
	}

}