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  • Book Overview & Buying Instant GSON
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Instant GSON

Instant GSON

By : Sandeep Patel
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Instant GSON

Instant GSON

By: Sandeep Patel
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Overview of this book

GSON is a specialized Java-based library for handling JSON data, developed by Google. GSON demonstrates an efficient use of CPU time, memory efficiency, the library, and developer productivity. This book will help you implement GSON in your Java project. Instant GSON is a practical, hands-on guide that provides you with all the implementation features of the GSON API through coded examples, which will help you take advantage of the real power that is behind the GSON API, and give you a good grounding to use it in your projects. Instant GSON starts with an introduction to the JSON data format and GSON library. It will take you through the configuration steps required to set up a GSON-based Java project. You will learn about the top features of the GSON library, which includes handling generic type and nested class objects in Java, implementing versioning support, exclusion strategies, and pretty printing. At the end of the book you will find some useful references to articles, blogs, and active communities.
Table of Contents (7 chapters)
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Instant GSON
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Instant GSON
Credits
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Credits
About the Author
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About the Author
About the Reviewers
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About the Reviewers
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Instant GSON
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Instant GSON
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So, what is GSON?
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Configuring GSON in Eclipse
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Quick start – creating your first JSON in GSON
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Top 12 features you need to know about
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People and places you should get to know

Configuring GSON in Eclipse

In this section, you will learn about configuring the GSON library in Eclipse IDE for a simple Java project and a Maven type project.

Getting the GSON library

The GSON library project is an open source project and is hosted by Google. This project is free for download and its use is based on Apache License 2.0. The current release of this library is 2.2.2.

The base URL of this library is http://code.google.com/p/google-gson. Navigate to the download section of this page and download the zipped version (google-gson-2.2.2-release.zip). To verify the correct download of this ZIP file, you can compare the checksum that is provided at the base site of GSON.

You can see the following five files when you unzip the downloaded file. Two of them are text files and the other three are JAR files:

File

Type

Details

License

Text

This text file has all the description about Apache License 2.0 and its use

ReadMe

Text

This text file contains the information and purpose of the GSON library

gson-2.2.2-sources

JAR

This JAR file contains all the source code for the GSON library

gson-2.2.2-javadoc

JAR

This JAR file contains the entire Java document generated by the GSON project

gson-2.2.2

JAR

This JAR file is your required GSON library

Configuring a Java project

To configure the GSON library in Eclipse for a Java project, a developer needs to execute the following steps:

  1. Create a new Java project in the Eclipse workspace. For example, GsonDemo.

  2. Create a new folder, say lib, inside the GsonDemo Java project and paste the gson-2.2.2.jar file in it.

  3. Add the JAR file in CLASSPATH of the project, and GSON is now all set to be used:

The preceding screenshot shows that the gson library is added to the Java project. Now, the GSON JAR file is listed in the Referenced Libraries.

Configuring a Maven project

All Maven project file dependencies are maintained by a project object model. In Maven 2, this file is known as pom.xml. All project specific configurations are added as dependencies in the plugin section of pom.xml.

There is a standard format to add a dependency to a Maven type of project. It requires certain tags and values to be included. To add the GSON dependency to a Maven-type project, perform the following steps:

  1. Create a Maven Java/Web project of JAR/WAR archetype, GsonMavenDemo.

  2. Add the GSON dependency in the plugin tag by using the dependency XML tag.

    The XML file looks as follows:

    <dependencies>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.2</version>
<scope>compile</scope>
</dependency>
</dependencies>

  3. Save the pom.xml file and use the install Maven option. Maven install looks through the Maven repository on the network and downloads the GSON library to the Maven dependency:

In the preceding screenshot, after the Maven installation, the GSON library JAR file gets added to the Maven Dependencies folder.

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