CODEWITHSUNDEEP
javaxmljaxb
user1010399
user1010399

Reputation: 2348

How to Populate the data from xml to java bean class

I want to populate all the xml data to java bean class, 

<employee>
    <empId>a01</empId>
    <dptName>dev</dptName>
    <person>
        <name>xyz</name>
        <age>30</age>
        <phone>123456</phone>
    </person>
</employee>

Below is the java bean class in which i want to store the xml data.

class employee{
 private String empId;
 private String dptName;
 private Person person;
    //getter setter below
    }

class Person{
    String name;
    private String age;
    private String phone;
    //getter setter below
}

I think this can be done using JAXB but how ?

Note : further i have to save the data into data base.

Upvotes: 1

Views: 4943

Answers (2)

bdoughan
bdoughan

Reputation: 149047

Without any annotations you could do the following with JAXB (JSR-222) which is included in the JDK/JRE since Java SE 6:

Without Annotations

Your model appears to match all the default naming rules necessary to map to the XML that you have posted. This means that you can use your model without adding any metadata in the form of annotations. One thing to note is that if you don't specify metadata to associate root elements with classes then you need to specify a Class parameter when unmarshalling and wrap the root object in an instance of JAXBElement when marshalling.

Demo

In the demo code below we will convert the XML to objects and then convert the objects back to XML.

JAXBContext jc = JAXBContext.newInstance(Employee.class);

Unmarshaller unmarshaller = jc.createUnmarshaller();
JAXBElement<Employee> je = unmarshaller.unmarshal(xml, Employee.class);
Employee employee = je.getValue();

Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(je, System.out);

For More Information

Removing the Need to JAXBElement with @XmlRootElement

When a class is associated with a root element using @XmlRootElement (or @XmlElementDecl) then you don't need to specify the Class parameter when unmarshalling or wrap the result in a JAXBElement when marshalling.

Employee

@XmlRootElement
class Employee {

Demo

JAXBContext jc = JAXBContext.newInstance(Employee.class);

Unmarshaller unmarshaller = jc.createUnmarshaller();
Employee employee = (Employee) unmarshaller.unmarshal(xml);

Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(employee, System.out);

For More Information

Upvotes: 5

Satyam Koyani
Satyam Koyani

Reputation: 4274

You can do this thing easily with the xstream api

XStream is a simple library to serialize objects to XML and back again.

Here you will find documentation XStream Core 1.4.5-SNAPSHOT documentation

Upvotes: -2

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