Jsp/Servlet

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Java

AdminFilter.java：源码内容

							package com.appspot.cindyblog.common;
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;
public class AdminFilter implements Filter {
	public void doFilter(HttpServletRequest request, HttpServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		
	}
	public void init(FilterConfig filterConfig) throws ServletException {
	}
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest h = (HttpServletRequest) request;
		HttpServletResponse r = (HttpServletResponse) response;
		String username = (String) h.getSession().getAttribute("username");
		if(username == null){
			r.sendRedirect("/");
		}else{
			arg2.doFilter(request, response);
		}
	}
	public void destroy() {
		// TODO Auto-generated method stub
		
	}
}

						