Hibernate Validator Engine Relocation Artifact Work Principles Analysis
Hibernate Validator is a verification framework implemented based on the Bean Validation specification.It provides a lightweight and easy -to -use way to verify the status of the object and the legitimacy of the data.In Hibernate Validator, Engine RELOCATION Artifact is one of the important components.This article will analyze the working principle of Hibernate Validator Engine Relocation Artifact and provide some Java code examples.
In Hibernate Validator, Engine RELOCATION Artifact is used to provide support and resources for verifying engines.These resources include verification rules and internationalization.Engine RELOCATION Artifact is implemented by packing these resources into an independent executable jar file.When using Hibernate Validator in the application, you can simply add this jar file to the class path to use a powerful verification function.
The following is an example of the Java code, which demonstrates how to use Hibernate Validator Engine Relocation Artifact to verify:
import org.hibernate.validator.HibernateValidator;
import org.hibernate.validator.cfg.ConstraintMapping;
import org.hibernate.validator.cfg.defs.EmailDef;
import org.hibernate.validator.cfg.defs.NotEmptyDef;
import org.hibernate.validator.constraintvalidation.HibernateConstraintValidatorInitializationContext;
import org.hibernate.validator.constraintvalidation.HibernateConstraintValidatorInitializationListener;
import org.hibernate.validator.engine.ConfigurationImpl;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import java.util.Set;
public class ValidatorExample {
public static void main(String[] args) {
// Create the configuration object of the verification engine
ConfigurationImpl configuration = new ConfigurationImpl(new HibernateValidator());
// Register HibernateConstraintValidatorInitializationListener
configuration.registerBootstrapListener(new HibernateConstraintValidatorInitializationListener() {
@Override
public void onInitialize(
HibernateConstraintValidatorInitializationContext initializationContext) {
// Here
}
});
// Create and configure verification rules
ConstraintMapping constraintMapping = configuration.createConstraintMapping();
constraintMapping.type(User.class)
.property("name", ElementType.FIELD)
.constraint(new NotEmptyDef())
.property("email", ElementType.FIELD)
.constraint(new EmailDef());
configuration.addMapping(constraintMapping);
// Construct the verification device
Validator validator = configuration.buildValidatorFactory().getValidator();
// Create the object to be verified
User user = new User();
user.setName("");
user.setEmail("invalid-email");
// Execute verification
Set<ConstraintViolation<User>> violations = validator.validate(user);
// Output verification results
for (ConstraintViolation<User> violation : violations) {
System.out.println(violation.getPropertyPath() + ": " + violation.getMessage());
}
}
static class User {
@NotEmpty
private String name;
@Email
private String email;
// omitted getters and setters
}
}
In the above code, the configuration object of a Hibernate Validator was created first.Various configurations can be performed through this object, such as registered CONSTRAINTVALIDATOR, creating verification rules, etc.In the sample code, we register a HibernateConstraintValidatorInitializationListener for initialization of customizedValidator.
Then, a ConstraintMapping object was created and used it to define the verification rules.In the sample code, we add @NoteMPty annotations to the name property of the User class, adding @Email annotations to the email attribute.
Then, a verification device is constructed by the configuration object's BuildValidatorFactory () method.You can use the verification device to verify the object.
Finally, a User object to be verified is created, and the value method of the verification device is called to verify.The verification results will be returned in the form of the Constraintvilation object and traversed and output in the sample code.
Through the above example code, you can see the working principle of Hibernate Validator Engine RELOCATION Artifact.It provides a way to pack the verification engine and its related resources into an independent jar file, making the use of the verification device simpler and flexible.
