java特性--cookie保存用户和密码

package servlet; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import biz.UserBiz; import entity.User; public class LoginServlet extends HttpServlet { /** * 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 { doPost(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 { response.setContentType("text/html"); String username=request.getParameter("loginname"); String password = request.getParameter("password"); String timestr = request.getParameter("time"); User user = new User(); user.setPassword(password); user.setUsername(username); UserBiz ubiz = new UserBiz(); if(ubiz.checkUser(user)){ //保存用户密码到cookie Cookie uco = new Cookie("uname",username);//新建名称为uname的cookie对象，并将其内容设置为用户名 uco.setMaxAge(Integer.parseInt(timestr));//设置cookie的保存时间，以秒单位 Cookie pco = new Cookie("upass",password); pco.setMaxAge(Integer.parseInt(timestr)); response.addCookie(uco); //保存cookie到客户端 response.addCookie(pco); request.getSession().setAttribute("username", username); response.sendRedirect("test.jsp"); } else{ request.setAttribute("msg", "用户或密码错误"); request.getRequestDispatcher("/login.jsp").forward(request, response); } } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occure */ public void init() throws ServletException { // Put your code here } }