Jsp/Servlet

开发平台：

Java

FilterAdmin.java：源码内容

							package org.yufeng.utils;
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 FilterAdmin implements Filter{
	
	public void destroy() {
	}
	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) res;
		HttpSession session = request.getSession();
		Object name = session.getAttribute("AdminLock");
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");
		PrintWriter out = response.getWriter();
		if (name != null) {
			chain.doFilter(req, res);
		} else {
			out.print("<script language="javascript">alert("非法访问!请您重新登录！");window.location.href='../admin_login.jsp';</script>");
		}
	}
	public void init(FilterConfig arg0) throws ServletException {
	}
}

						