forumuserfilter.java

来自「struts+hibernate BBS mysql数据库 功能基本齐全」· Java 代码 · 共 45 行

package com.elan.forum.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;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class ForumUserFilter extends HttpServlet implements Filter {
	private static final Log log = LogFactory.getLog(ForumUserFilter.class);
	protected FilterConfig filterConfig = null;
	public void destroy() {
		this.filterConfig = null;
	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) arg0;
		HttpServletResponse response = (HttpServletResponse) arg1;
		HttpSession session = request.getSession();
		System.out.println("UserFilter++++++++++++++++++++++");
		if(session.getAttribute("user") == null) {
			System.out.println("用户没有登陆");
			response.sendRedirect(request.getContextPath() + "/forum/jsp/user/UserLogon.jsp");
		}else {
			chain.doFilter(arg0, arg1);
		}
		System.out.println("UserFilter++++++++++++++++++++++");
	}
	public void init(FilterConfig arg0) throws ServletException {
		this.filterConfig = arg0;
	}

}