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Developing Middleware in Java EE 8

You're reading from   Developing Middleware in Java EE 8 Build robust middleware solutions using the latest technologies and trends

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Product type Paperback
Published in Jun 2018
Publisher Packt
ISBN-13 9781788391078
Length 252 pages
Edition 1st Edition
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Author (1):
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Abdalla Mahmoud Abdalla Mahmoud
Author Profile Icon Abdalla Mahmoud
Abdalla Mahmoud
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Table of Contents (12) Chapters Close

Preface 1. Delving into Java EE 8 2. Dependency Injection Using CDI 2.0 FREE CHAPTER 3. Accessing the Database with JPA 2.1 4. Validating Data with Bean Validation 2.0 5. Exposing Web Services with JAX-RS 2.1 6. Manipulating JSON with JSON-B 1.0 7. Communicating with Different Systems with JMS 2.0 8. Sending Mails with JavaMail 1.6 9. Securing an Application with Java Security 1.0 10. Making Interactive Applications with WebSockets 1.1 11. Other Books You May Enjoy

Mapping objects

The first thing to learn in JSON-B API, is basically mapping Java objects from/to JSON strings. The entry point to use mapping and other JSON-B features are the Jsonb object. The Jsonb object is instantiated through a JsonbBuilder class, as will be shown in the following example.

After creating the jsonb object, the methods toJson() and fromJson() serialize an object to a JSON string and deserialize an object from a JSON string, respectively. In the following example, we will show how to serialize a movie object into a JSON string:

public class Movie { 
 
    private long id; 
    private String title; 
 
    // setters and getters here 
 
} 
 
// instantiating a jsonb object 
Jsonb jsonb = JsonbBuilder.create(); 
jsonb.toJson(jsonb); 
 
//creating a movie object 
Movie movie = new Movie(); 
movie.setId(15); 
movie.setTitle("Beauty and The Beast...
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