JavaScript Object Notation (JSON) is a lightweight data-interchange format that is commonly used in web services to send and receive data. Currently, Java web applications use different implementation libraries to consume/produce JSON. JSR-353 introduces the Java API for JSON processing for generating, parsing, transforming, and querying JSON. With standardized JSON API implementation, libraries are not required, which makes the applications more portable. The objective of JSR-353 is to provide JSON APIs to produce/consume streaming JSON and to build a Java object model for JSON. Support for Java API for JSON has been added to Java EE 7. In this chapter, we will discuss support for generating and parsing JSON. This chapter has the following sections:
- Setting the environment
- Creating a Maven project
- Creating JSON
- Parsing JSON
- Processing JSON in a RESTful web service
We need to download and install the following software:
- WildFly 8.1.0.Final: Download
wildfly-8.1.0.Final.zipfrom http://wildfly.org/downloads/. - MySQL 5.6 Database-Community Edition: Download this edition from http://dev.mysql.com/downloads/mysql/. When installing MySQL, also install Connector/J.
- Eclipse IDE for Java EE Developers: Download Eclipse Luna from https://www.eclipse.org/downloads/packages/release/Luna/SR1.
- JBoss Tools (Luna) 4.2.0.Final (or the latest version): Install this as a plugin to Eclipse from Eclipse Marketplace (http://tools.jboss.org/downloads/installation.html).
- Apache Maven: Download version 3.05 or higher from http://maven.apache.org/download.cgi.
- Java 7: Download Java 7 from http://www.oracle.com/technetwork/java/javase/downloads/index.html?ssSourceSiteId=ocomcn.
Set the JAVA_HOME, JBOSS_HOME, and MAVEN_HOME environment variables Add %JAVA_HOME%/bin, %MAVEN_HOME%/bin, and %JBOSS_HOME%/bin to the PATH environment variable.
Create a WildFly 8.1.0 runtime as discussed in Chapter 1, Getting Started with EJB 3.x.