<?xml version="1.0" encoding="UTF-8" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
	targetNamespace="http://jaxb.sample"
	xmlns:ns="http://jaxb.sample">
	<xsd:element name="accounts" type="ns:accounts">
	</xsd:element>
	
	<xsd:complexType name="accounts">
		<xsd:sequence>
			<xsd:element name="data" type="ns:data" minOccurs="0" maxOccurs="unbounded" />
		</xsd:sequence>
	</xsd:complexType>
	
	<xsd:complexType name="data">
		<xsd:sequence>
			<xsd:element name="cost" type="xsd:long" />
			<xsd:element name="comment" type="xsd:string" minOccurs="0"/>
		</xsd:sequence>
		<xsd:attribute name="date" type="xsd:date" />
	</xsd:complexType>
</xsd:schema>

> xjc accounts.xsd

• Accounts.java
• Data.java
• ObjectFactory.java
• package-info.java

public class Jaxb {
	private JAXBContext jc;
	private ObjectFactory factory = new ObjectFactory();

	public Jaxb() throws JAXBException {
		jc = JAXBContext.newInstance("sample.jaxb");
	}

	public void write(Accounts accounts, String fileName) throws JAXBException,FileNotFoundException {
		Marshaller marshaller = jc.createMarshaller();
		marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, new Boolean(true));

		FileOutputStream fo = new FileOutputStream(new File(fileName));
		JAXBElement<Accounts> element = factory.createAccounts(accounts);
		try {
			marshaller.marshal(element, fo);
		} finally {
			try {
				fo.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	public Accounts read(File xmlFile) throws JAXBException{
		Unmarshaller unmarshaller = jc.createUnmarshaller();
		JAXBElement<Accounts> o = (JAXBElement<Accounts>) unmarshaller.unmarshal(xmlFile);
		return o.getValue();
	}
	
	public static Data getData(String comment, long cost, Date date) throws DatatypeConfigurationException {
		// Date => XmlGregorianCalender
		GregorianCalendar gc = new GregorianCalendar();
		gc.setTime(date);
		DatatypeFactory factory = DatatypeFactory.newInstance();
		XMLGregorianCalendar xgc = factory.newXMLGregorianCalendar(gc);

		Data data = new Data();
		data.setComment(comment);
		data.setCost(cost);
		data.setDate(xgc);
		return data;
	}

	public static void main(String[] args) throws JAXBException, DatatypeConfigurationException, FileNotFoundException {
		Jaxb jaxb = new Jaxb();
		Accounts accounts = new Accounts();

		accounts.getData().add(Jaxb.getData("朝飯", 150, new Date()));
		accounts.getData().add(Jaxb.getData("昼飯", 500, new Date()));
		accounts.getData().add(Jaxb.getData("晩飯", 1000, new Date()));

		jaxb.write(accounts, "sample.xml");
		
		Accounts accounts2 = jaxb.read(new File("sample.xml"));
		for(Data data : accounts2.getData()){
			System.out.println(data.getComment()+ ":"+ data.getCost());
		}
		
	}
}