jsp中不能提取cookie!?

发布网友发布时间：2023-07-13 07:37

共3个回答

热心网友时间：2024-10-22 14:37

//这是一个servlet的，你改成JSP的就可以用，你可以参照里面的逻辑去做一下，说不定可以帮你（这道题是记住用户自动登陆）

package servlets;

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;

public class Login extends HttpServlet {

public Login() {
super();
}

public void destroy() {
super.destroy();
}

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html;charset=GBK");
PrintWriter out = response.getWriter();

Cookie[] cookies = request.getCookies();
if(cookies != null){
for(Cookie cookie : cookies){
out.println("用户名："+cookie.getName()+"<br />");
out.println("密码："+cookie.getValue()+"<br />");
out.println(cookie.getName() + "，您好！欢迎来到登陆页面！！");
}
}else{
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>Login Servlet</TITLE></HEAD>");
out.println(" <BODY><form action='Login' method='post'>");
out.print("<p>用户名：<input name='name' type='text' /></p>" +
"<p>密码：<input name='pwd' type='password' /></p>" +
"<p><input name='jizhu' type='checkbox' />记住我</p>" +
"<p><input name='sub' type='submit' value='登录' /></p>");
out.println("</form> </BODY>");
out.println("</HTML>");
}
out.flush();
out.close();
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html;charset=GBK");
PrintWriter out = response.getWriter();

String name = request.getParameter("name");
String pwd = request.getParameter("pwd");
String jizhu = request.getParameter("jizhu");

if(jizhu != null){
Cookie mycookie = new Cookie(name,pwd);
mycookie.setMaxAge(60*60*24*7);
mycookie.setPath("/");
response.addCookie(mycookie);
}

if(name.equals("haha") && pwd.equals("123")){
out.println(name + "，您好！欢迎来到登陆页面！！");
}else{
out.println("登陆失败！！");
}

out.flush();
out.close();
}

public void init() throws ServletException {
}

}

热心网友时间：2024-10-22 14:37

读取的时候判断一下coocie是否为空，还有在用户退出的时候要保存cookie到本地。

热心网友时间：2024-10-22 14:38

砸了它!!!