securityfilter.java

运用jsp/servlet技术 通过bs方式 在网上购买MP3

package com.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 javax.servlet.http.HttpSession;

public class SecurityFilter implements Filter {


	public void destroy() {
		// TODO Auto-generated method stub

	}


	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)arg0;
		HttpServletResponse response=(HttpServletResponse)arg1;
		
		String path=request.getServletPath();
		System.out.println(path);
		
		if(path.equals("/jsp/Login.jsp") ||path.equals("/servlet/LoginServlet")||path.endsWith(".jpg")){
			arg2.doFilter(request, response);
		}
		else{
			HttpSession session=request.getSession();
			Boolean flag=(Boolean)session.getAttribute("isLogin");
			if(flag!=null&flag){
				arg2.doFilter(request, response);
			}
			else{
				response.sendRedirect("/TaglibMp3/jsp/Login.jsp");
			}
			
		}
	}

	
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

}