teacherfilter.java

使用JSP+Servlet+Hibernate+Struts实现的一个学生软件发布平台

package edu.neu.sspp.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.HttpServletResponse;

import edu.neu.sspp.SSPPLogger;
import edu.neu.sspp.hibernate.TProject;
import edu.neu.sspp.hibernate.TProjectDAO;
import edu.neu.sspp.hibernate.TTeacher;
import edu.neu.sspp.hibernate.TTeacherDAO;
import edu.neu.sspp.hibernate.TUser;

public class TeacherFilter implements Filter{

	  public void doFilter(ServletRequest request, ServletResponse response,
				FilterChain chain) 
      
        throws ServletException, IOException {
			
      HttpServletRequest httpRequest = (HttpServletRequest) request;
      HttpServletResponse httpResponse = (HttpServletResponse) response;

		if (httpRequest.getSession().getAttribute("login") == null || !httpRequest.getSession().getAttribute("login").equals("teacher"))
		{
			SSPPLogger.logWarn("非教师用户越权操作" + "IP:" + request.getRemoteAddr());
			
			httpResponse.sendRedirect(httpRequest.getContextPath() + "/error_page/error_500.jsp");
		}
		else
		   
		    chain.doFilter(request, response);
			return;
	  }
		public void init(FilterConfig config) throws ServletException {
		}

		public void destroy() {
		}

	
	
	
}