Cookie自动登录用户名密码

package servlet; import java.io.IOException; 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 com.ysl.DBoracle; import com.ysl.User; public class AutomUser extends HttpServlet { /** * Constructor of the object. */ public AutomUser() { 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 { 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"); /** * 判断cookie是否存在该用户的信息 * */ Cookie[] cokies = request.getCookies(); String cookiesName = ""; String cookiesPass = ""; for (int i = 0; i < cokies.length; i++) { if ("cookieName".equals(cokies[i].getName())) { cookiesName = cokies[i].getValue(); } if ("cookiePass".equals(cokies[i].getName())) { cookiesPass = cokies[i].getValue(); } } /** * 判断用户是否自动登录 */ if (cookiesName != "" && cookiesPass != "") { //登录成功 System.out.println("cookie......"); response.sendRedirect("../index.jsp"); return; } else { String name = request.getParameter("username"); String pass = request.getParameter("password"); //是否自动保存用户名或密码 String flag = request.getParameter("checked"); System.out.println(flag); /** * 判断用户是否保存用户名和密码 * 注意：通过用户名、密码到后台判断 如果判断成功后才保存到cookie中 * 例如：User * */ User user = null; if (user == null) { System.out.println("User....."); //保存cookie if (flag != null) { Cookie cookieName = new Cookie("cookieName", name); Cookie cookiePass = new Cookie("cookiePass", pass); cookieName.setMaxAge(60*60*100*1000); cookiePass.setMaxAge(60*60*100*1000); response.addCookie(cookieName); response.addCookie(cookiePass); System.out.println("savecookie......"); } //登录成功 response.sendRedirect("../index.jsp"); System.out.println("newUser....."); return; } } //登录失败 System.out.println("endstart...."); response.sendRedirect("../User/Login.jsp"); System.out.println("end...."); } /** * Initialization of the servlet. <br> * * @throws ServletException * if an error occurs */ public void init() throws ServletException { // Put your code here } }