mvc三层架构实现用户登录
时间: 2023-11-14 09:08:49 浏览: 50
好的,针对您的问题,我可以给出以下的回答:
MVC三层架构是一种常见的软件架构模式,它将应用程序分为三个主要部分:模型(Model)、视图(View)和控制器(Controller)。其中,模型负责处理数据,视图负责展示数据,控制器负责协调模型和视图之间的交互。下面是一个简单的MVC三层架构实现用户登录的示例:
1. 模型层:定义用户数据模型和数据访问接口
```java
public class User {
private String username;
private String password;
public User(String username, String password) {
this.username = username;
this.password = password;
}
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
}
public interface UserDao {
User getUserByUsername(String username);
}
```
2. 控制器层:定义用户登录控制器和视图接口
```java
public class LoginController {
private UserDao userDao;
public LoginController(UserDao userDao) {
this.userDao = userDao;
}
public boolean login(String username, String password) {
User user = userDao.getUserByUsername(username);
if (user != null && user.getPassword().equals(password)) {
return true;
}
return false;
}
}
public interface LoginView {
void showLoginSuccess();
void showLoginFailed();
}
```
3. 视图层:实现用户登录界面和视图接口
```java
public class LoginFrame extends JFrame implements LoginView {
private JTextField usernameField;
private JPasswordField passwordField;
private JButton loginButton;
private LoginController loginController;
public LoginFrame(LoginController loginController) {
this.loginController = loginController;
// 初始化界面组件
// ...
// 绑定登录按钮事件
loginButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String username = usernameField.getText();
String password = new String(passwordField.getPassword());
boolean success = loginController.login(username, password);
if (success) {
showLoginSuccess();
} else {
showLoginFailed();
}
}
});
}
@Override
public void showLoginSuccess() {
JOptionPane.showMessageDialog(this, "登录成功");
}
@Override
public void showLoginFailed() {
JOptionPane.showMessageDialog(this, "登录失败");
}
}
```