www.pudn.com > SSPP.rar > TeacherFilter.java

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() { 
		} 
 
	 
	 
	 
}