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JAXB Tutorial

JAXB tutorial provides concepts and API to convert object into XML and XML into object. Our JAXB tutorial is designed for beginners and professionals.

JAXB stands for Java Architecture for XML Binding. It provides mechanism to marshal (write) java objects into XML and unmarshal (read) XML into object. Simply, you can say it is used to convert java object into xml and vice-versa.

JAXB 2 Tutorial

Features of JAXB 2.0

JAXB 2.0 includes several features that were not present in JAXB 1.x. They are as follows:

1) Annotation support: JAXB 2.0 provides support to annotation so less coding is required to develop JAXB application. The javax.xml.bind.annotation package provides classes and interfaces for JAXB 2.0.

2) Support for all W3C XML Schema features: it supports all the W3C schema unlike JAXB 1.0.

3) Additional Validation Capabilities: it provides additional validation support by JAXP 1.3 validation API.

4) Small Runtime Library: it required small runtime library that JAXB 1.0.

5) Reduction of generated schema-derived classes: it reduces a lot of generated schema-derived classes.


Simple JAXB Marshalling Example: Converting Object into XML

Let's see the steps to convert java object into XML document.

  • Create POJO or bind the schema and generate the classes
  • Create the JAXBContext object
  • Create the Marshaller objects
  • Create the content tree by using set methods
  • Call the marshal method
File: Employee.java

@XmlRootElement specifies the root element for the xml document.

@XmlAttribute specifies the attribute for the root element.

@XmlElement specifies the sub element for the root element.

File: ObjectToXml.java

Output:

The generated xml file will look like this:

File: employee.xml

Simple JAXB UnMarshalling Example: Converting XML into Object

File: XMLToObject.java

Output:

1 Vimal Jaiswal 50000.0






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