authorizationfilter.java

ssh 实例spring对hibernate的封装

package com.ssh.struts.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.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

public class AuthorizationFilter extends Action implements Filter {
	private FilterConfig config;
	
	private String login = "/login.jsp";

	@Override
	public void destroy() {
		// TODO Auto-generated method stub
		this.config = null;
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		HttpServletRequest req = (HttpServletRequest)request;
		HttpSession session = req.getSession(true);
		String user = (String)session.getAttribute("user");
		if(user != null && !"".equals(user)){
			chain.doFilter(request, response);
		}else{
			session.invalidate();
			ActionMessages errors = new ActionMessages();
			errors.add(ActionMessages.GLOBAL_MESSAGE, new ActionMessage("error.authorization.no"));
			this.saveErrors(req, errors);
			req.getRequestDispatcher(login).forward(request, response);
		}
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		// TODO Auto-generated method stub
		this.config = config;
		if(this.config.getInitParameter("login") != null){
			login = this.config.getInitParameter("login");
		}
	}

}