JSP使用Servlet过滤器进行身份验证的方法_JSP编程_

 @WebFilter("/FilterStation") public class FilterStation extends HttpServlet implements Filter { private FilterConfig filterConfig; public FilterStation() { super(); } public void destroy() { } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpSession session=((HttpServletRequest)request).getSession(); response.setCharacterEncoding("gb2312"); if(session.getAttribute("me")==null){ PrintWriter out=response.getWriter(); out.print(""); } else{ // pass the request along the filter chain chain.doFilter(request, response); } } public void init(FilterConfig fConfig) throws ServletException { // TODO Auto-generated method stub this.filterConfig=fConfig; } } 

filterstationzhou.FilterStationfilterstation/chap08/*

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<%@ page contentType="text/html;charset=GB2312" %><% if (request.getParameter("user")!=null && request.getParameter("pass")!=null) { String strName=request.getParameter("user"); String strPass=request.getParameter("pass"); if (strName.equals("admin") && strPass.equals("admin")) { session.setAttribute("login","OK"); session.setAttribute("me",strName); response.sendRedirect("chap08/welcome.jsp"); } else { out.print(""); } } %>