public class User {
@NotNull
private String username;
@Email
private String email;
// Getters and Setters
}
public class Main {
public static void main(String[] args) {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
User user = new User();
user.setUsername(null);
user.setEmail("invalid_email");
Set<ConstraintViolation<User>> violations = validator.validate(user);
for (ConstraintViolation<User> violation : violations) {
System.out.println(violation.getMessage());
}
}
}
public class Main {
public static void main(String[] args) {
String email = "invalid_email";
boolean isValidEmail = EmailValidator.getInstance().isValid(email);
if (isValidEmail) {
System.out.println("Email is valid");
} else {
System.out.println("Email is invalid");
}
}
}
public class User {
@NotEmpty
private String username;
@Email
private String email;
// Getters and Setters
}
@Controller
public class UserController {
@RequestMapping(value = "/user", method = RequestMethod.POST)
public String createUser(@Valid User user, BindingResult result) {
if (result.hasErrors()) {
return "error";
}
// Save the user to database
return "success";
}
}
