www.pudn.com > online-trading.rar > AuthFilter.java

package com.bjsxt.shopping.util.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; 
 
public class AuthFilter implements Filter { 
 
	public void destroy() { 
		System.out.println("authfilter destroy"); 
	} 
 
	public void doFilter(ServletRequest req, ServletResponse resp, 
			FilterChain chain) throws IOException, ServletException { 
		//System.out.println("authfilter dofilter"); 
		HttpServletRequest request = (HttpServletRequest)req; 
		HttpServletResponse response = (HttpServletResponse)resp; 
		HttpSession session = request.getSession(false); 
		 
		if(session == null || (String)session.getAttribute("admin") == null ||!((String)session.getAttribute("admin")).equals("admin")) { 
			System.out.println(request.getContextPath()); 
			response.sendRedirect( request.getContextPath() + "/AdminLogin.jsp"); 
			return; 
		} 
		chain.doFilter(req, resp); 
	} 
 
	public void init(FilterConfig config) throws ServletException { 
		System.out.println("authfilter init"); 
	} 
 
}