毕业论文选题系统

package org.aaron.subject; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class SessionChecker implements Filter { private ServletContext context; private String targetURI; public void init(FilterConfig config) throws ServletException { context = config.getServletContext(); targetURI = config.getInitParameter("targetURI"); } public void doFilter( ServletRequest request, ServletResponse response, FilterChain chain)throws IOException, ServletException { HttpServletRequest httpRequest = (HttpServletRequest) request; HttpServletResponse httpResponse = (HttpServletResponse) response; HttpSession session = httpRequest.getSession(false); System.out.println("runing sessionchecker "); if (session != null) { String passed = (String) session.getAttribute("passed"); if ("true".equals(passed)) { if (targetURI=="/subject/manage/index.jsp"){ if ("admin".equals((String)(session.getAttribute("userName")))){ return; } httpRequest.getRequestDispatcher("/subject").forward(httpRequest, httpResponse); } chain.doFilter(httpRequest, httpResponse); System.out.println("runing sessionchecker passed"); return; } else if ("passing".equals(passed)) { if (new String(httpRequest.getRequestURI()) .equals("/subject/LoginChecker")) { chain.doFilter(httpRequest, httpResponse); System.out.println("runing sessionchecker passing"); return; } } else { } session.removeAttribute("passed"); } StringBuffer requestURL = httpRequest.getRequestURL(); String query = httpRequest.getQueryString(); if (query != null) requestURL.append(query); httpRequest.setAttribute("originalURI", new String(requestURL)); httpRequest.getRequestDispatcher(targetURI).forward(httpRequest, httpResponse); } public void destroy() { } }