1. 用户注册与登录功能:用户注册后可以登录,如忘记密码可以找回密码,登陆后可以修改除用户名以外的注册资料;注册时用户名不能重复。密码必须是8位以上的字母和数字组合,并且在数据库中进行加密存储。找回密码时使用注册资料进行验证。JPA完成增删改查。代码
时间: 2024-02-27 07:55:56 浏览: 24
好的,以下是一个简单的基于JPA实现用户注册、登录、找回密码和修改个人资料的示例代码:
User实体类:
```
@Entity
@Table(name = "user")
public class User implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(unique = true)
private String username;
private String password;
private String email;
// 省略getter和setter方法
}
```
UserDAO类:
```
@Stateless
public class UserDAO {
@PersistenceContext(unitName = "myPU")
private EntityManager em;
public void register(User user) {
em.persist(user);
}
public User findByUsername(String username) {
TypedQuery<User> query = em.createQuery("SELECT u FROM User u WHERE u.username = :username", User.class);
query.setParameter("username", username);
List<User> users = query.getResultList();
return users.isEmpty() ? null : users.get(0);
}
public User login(String username, String password) {
User user = findByUsername(username);
if (user != null && user.getPassword().equals(encrypt(password))) {
return user;
} else {
return null;
}
}
public void update(User user) {
em.merge(user);
}
public User findByEmail(String email) {
TypedQuery<User> query = em.createQuery("SELECT u FROM User u WHERE u.email = :email", User.class);
query.setParameter("email", email);
List<User> users = query.getResultList();
return users.isEmpty() ? null : users.get(0);
}
private String encrypt(String password) {
// TODO: 使用加密算法对密码进行加密
return password;
}
}
```
UserManager类:
```
@Stateful
public class UserManager {
@EJB
private UserDAO userDao;
private User currentUser;
public void register(User user) {
User existingUser = userDao.findByUsername(user.getUsername());
if (existingUser != null) {
throw new RuntimeException("用户名已经存在");
}
user.setPassword(userDao.encrypt(user.getPassword()));
userDao.register(user);
}
public void login(String username, String password) {
User user = userDao.login(username, password);
if (user == null) {
throw new RuntimeException("用户名或密码不正确");
}
currentUser = user;
}
public void update(User user) {
currentUser.setEmail(user.getEmail());
currentUser.setPassword(userDao.encrypt(user.getPassword()));
userDao.update(currentUser);
}
public void forgotPassword(String email) {
User user = userDao.findByEmail(email);
if (user == null) {
throw new RuntimeException("该邮箱未注册");
}
// TODO: 发送修改密码的链接或临时密码到用户的邮箱
}
}
```
以上是一个简单的示例代码,实现了基本的用户注册、登录、找回密码和修改个人资料功能。需要根据具体的需求进行适当的修改和完善。
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