关于如何清空session的例子

import java.io.IOException; import java.io.PrintWriter; import java.util.Enumeration; import javax.mail.Session; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class sessionClose extends HttpServlet { /** * Constructor of the object. */ public sessionClose() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Enumeration em = request.getSession().getAttributeNames(); System.out.println(em.hasMoreElements() + "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); while (em.hasMoreElements()) { String sessionName = (String) em.nextElement(); System.out.println("存在的session有：" + sessionName); request.getSession().removeAttribute(sessionName); } request.getRequestDispatcher("/index.jsp").forward(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to * post. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } /** * Initialization of the servlet. <br> * * @throws ServletException * if an error occurs */ public void init() throws ServletException { // Put your code here } }