每日记录

今天研究了javaweb的记住用户，就是用户登陆过之后可以选择记住用户，下次登录时不用再输入密码账号

具体实现如下

import wmx.bean.User;

import wmx.service.UserService;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.Cookie;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.sql.SQLException;

@WebServlet(name = "LoginServlet",urlPatterns = "/login")

public class LoginServlet extends HttpServlet {

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

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

String password = request.getParameter("password");

UserService userService=new UserService();

User user=null;

try {

//调用service中登录方法

user = userService.login(name, password);

} catch (SQLException e) {

e.printStackTrace();

}

if (user!=null){

//登录成功后我们再获取是否保存密码的信息，如果失败了保存密码就没有意义了

String remember = request.getParameter("remember");

if (remember.equals("yes")){

// 将用户名和密码加入到cookie中

Cookie nameCookie = new Cookie("name", name);

Cookie passwordCookie = new Cookie("password", password);

//设置cookie的有效期 防止销毁

nameCookie.setMaxAge(60*10);//10分钟

passwordCookie.setMaxAge(60*10);

//将cookie发送给客户端保存

response.addCookie(nameCookie);

response.addCookie(passwordCookie);

}

//登录成功跳转生鲜种类列表界面

response.sendRedirect(request.getContextPath()+"/category-list.jsp");

}else {

//登录失败提示

response.setContentType("text/html;charset=utf-8");

response.getWriter().write("用户登录失败");

}

}

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

}

}

~~~

在LoginServlet.java中加入代码段

~~~

//登录成功后我们再获取是否保存密码的信息，如果失败了保存密码就没有意义了

String remember = request.getParameter("remember");

if (remember.equals("yes")){

// 将用户名和密码加入到cookie中

Cookie nameCookie = new Cookie("name", name);

Cookie passwordCookie = new Cookie("password", password);

//设置cookie的有效期 防止销毁

nameCookie.setMaxAge(60*10);//10分钟

passwordCookie.setMaxAge(60*10);

//将cookie发送给客户端保存

response.addCookie(nameCookie);

response.addCookie(passwordCookie);

}