1. Hibernate Validator:
public class User {
private String username;
private String email;
// getters and setters
}
public class Main {
public static void main(String[] args) {
User user = new User();
user.setUsername("");
user.setEmail("example-email");
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Set<ConstraintViolation<User>> violations = validator.validate(user);
for (ConstraintViolation<User> violation : violations) {
System.out.println(violation.getMessage());
}
}
}
2. Bean Validation:
public class User {
private String username;
private String password;
// getters and setters
}
public class Main {
public static void main(String[] args) {
User user = new User();
user.setUsername(null);
user.setPassword("12345");
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Set<ConstraintViolation<User>> violations = validator.validate(user);
for (ConstraintViolation<User> violation : violations) {
System.out.println(violation.getMessage());
}
}
}
