accessfilter.java

来自「又一个课程设计 简易 JSP 论坛 功能较简单的那种, 界面上模仿了 Disc」· Java 代码 · 共 27 行

package cn.ialvin.bbs.filter;

import java.io.IOException;

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 AccessFilter implements javax.servlet.Filter {
	public void destroy() {}

	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest)arg0;
		if ("YES".equals(request.getSession().getAttribute("isLogin"))) {
			arg2.doFilter(arg0, arg1);
		} else {
			String path = request.getContextPath() + "/Index";
			((HttpServletResponse)arg1).sendRedirect(path);
		}
	}
	public void init(FilterConfig arg0) throws ServletException {}
}