How to integrate Jersey Ext Bean Validation framework in the Java library
How to integrate Jersey Ext Bean Validation framework in the Java library
Introduction:
Jersey is a popular Java library to build a RESTFUL Web service.Bean Validation is part of the Java EE specification and is used to verify the constraints of JavaBean.Jersey Ext Bean Validation is part of the Jersey extension. By integrating the Bean Validation framework, it provides verification functions for requesting entities and response entities.
Step 1: Introduce jersey dependencies
Add Jersey dependencies in the pom.xml file of the project.You can find the latest Jersey version in the Maven Central Conservation.
<dependency>
<groupId>org.glassfish.jersey.ext</groupId>
<artifactId>jersey-bean-validation</artifactId>
<version>2.34</version>
</dependency>
Step 2: Create the Resource class
Create a class containing Jersey resources and add `@path` to define resources on the class to define resources.
@Path("example")
public class ExampleResource {
// Resource methods
}
Step 3: Create a request entity and response entity class
Create the entity class used to request and respond, and add verification constraints to their attributes.For example, you can use the@notnull` notes to ensure that the attribute is not empty.
public class RequestEntity {
@NotNull
private String name;
// Getters and Setters
}
public class ResponseEntity {
@NotNull
private String message;
// Getters and Setters
}
Step 4: Add Bean Validation Notes
Add annotations of Bean Validation to the request entity and response entity class to meet your verification needs.You can use predetermined annotations, such as `@notnull`,`@siZe`, etc., or create custom notes.
public class RequestEntity {
@NotNull
@Size(min=3, max=20)
private String name;
// Getters and Setters
}
public class ResponseEntity {
@NotNull
private String message;
// Getters and Setters
}
Step 5: Use verification annotations in the Resource method parameter
Add verification notes to the parameter of the Resource method to perform verification before processing the request.For example, you can use the@Valid` notes in the post method to verify the request entity.
@Path("example")
public class ExampleResource {
@POST
public ResponseEntity createExample(@Valid RequestEntity requestEntity) {
// Process the request and return the response
}
}
Step 6: Register Jersey ValidationFeature
In the application classes of the application, create a `validationFeature` instance by calling the` ValidationFeature` method of the `valueFeature` and register it into Jersey's application configuration.
public class ApplicationConfig extends ResourceConfig {
public ApplicationConfig() {
register(ValidationFeature.builder().build());
}
}
Step 7: Start the application
You can start your Jersey application using an embedded server (such as Grizzly or Undertow) or Java Ee container (such as Tomcat or Wildfly).After starting the application, you can test the verification function by sending HTTP requests.
in conclusion:
By integrated Jersey Ext Bean Validation framework, you can easily implement the verification of request entities and response entities in the Java class library.Follow the above steps, applying Bean Validation annotations in your RESTFUL Web service to ensure the effectiveness and consistency of the data, and improve the stability and security of the application.
I hope this article will help you integrate Jersey Ext Bean Validation framework in the Java library.If you have any questions, please ask us at any time.
