loginfilter.java

基于J2EE的办公自动化系统。实现流程定义流程办理等。运用了hibernate+struts+spring框架综合运用的系统。

package com.oa.filter;

import java.io.IOException;
import java.io.PrintWriter;

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;

/**
 * 登录过滤器
 * @author student
 *
 */
public class LoginFilter implements Filter {

	public void init(FilterConfig arg0) throws ServletException {
		// TODO 自动生成方法存根

	}

	/**
	 * 过滤方法
	 */
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)req;
		HttpServletResponse response=(HttpServletResponse)res;
		PrintWriter out = response.getWriter();
		HttpSession session = request.getSession();
		if(session.getAttribute("user")==null){			
			request.getRequestDispatcher("/Jsp_file/login/login.jsp").forward(req,res);
		}else{
			chain.doFilter(req,res);
		}		
	}

	public void destroy() {
		// TODO 自动生成方法存根

	}

}