java ee完成以下功能: 在登录页面中输入用户名和密码,单击“提交”按钮 (1) 如果session中包含该用户,则跳转到登录成功页面 (2) 如果不包含该用户,则跳转到注册页面 注册页面注册成功之后,再次跳转到登录页面进行登录
时间: 2024-05-01 17:17:04 浏览: 15
以下为Java EE代码实现:
登录页面:
```html
<!DOCTYPE html>
<html>
<head>
<title>Login</title>
</head>
<body>
<h1>Login</h1>
<form method="POST" action="login">
<label>Username:</label>
<input type="text" name="username"><br><br>
<label>Password:</label>
<input type="password" name="password"><br><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
```
登录Servlet:
```java
@WebServlet("/login")
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
HttpSession session = request.getSession();
if (session.getAttribute(username) != null && session.getAttribute(username).equals(password)) {
response.sendRedirect("success");
} else {
response.sendRedirect("register");
}
}
}
```
注册页面:
```html
<!DOCTYPE html>
<html>
<head>
<title>Register</title>
</head>
<body>
<h1>Register</h1>
<form method="POST" action="register">
<label>Username:</label>
<input type="text" name="username"><br><br>
<label>Password:</label>
<input type="password" name="password"><br><br>
<input type="submit" value="Submit">
</form>
</body>
</html>
```
注册Servlet:
```java
@WebServlet("/register")
public class RegisterServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username = request.getParameter("username");
String password = request.getParameter("password");
HttpSession session = request.getSession();
session.setAttribute(username, password);
response.sendRedirect("login");
}
}
```
登录成功页面:
```html
<!DOCTYPE html>
<html>
<head>
<title>Login Success</title>
</head>
<body>
<h1>Login Success</h1>
</body>
</html>
```
以上代码实现了在登录页面中输入用户名和密码,单击“提交”按钮,如果session中包含该用户,则跳转到登录成功页面;如果不包含该用户,则跳转到注册页面。注册页面注册成功之后,再次跳转到登录页面进行登录。