jaxb

http://docs.oracle.com/cd/E17802_01/webservices/webservices/docs/1.5/tutorial/doc/JAXBUsing.html
With JAXB you can:
Generate JAXB Java classes from an XML schema
Use schema-derived JAXB classes to unmarshal and marshal XML content in a Java application
Create a Java content tree from scratch using schema-derived JAXB classes
Validate XML content during unmarshalling and at runtime
Customize JAXB schema-to-Java bindings

XSD data types

XSD type	Java type
xsd:string	java.lang.String
xsd:integer	java.math.BigInteger
xsd:int	int
xsd.long	long
xsd:short	short
xsd:decimal	java.math.BigDecimal
xsd:float	float
xsd:double	double
xsd:boolean	boolean
xsd:byte	byte
xsd:QName	javax.xml.namespace.QName
xsd:dateTime	javax.xml.datatype.XMLGregorianCalendar
xsd:base64Binary	byte[]
xsd:hexBinary	byte[]
xsd:unsignedInt	long
xsd:unsignedShort	int
xsd:unsignedByte	short
xsd:time	javax.xml.datatype.XMLGregorianCalendar
xsd:date	javax.xml.datatype.XMLGregorianCalendar
xsd:g	javax.xml.datatype.XMLGregorianCalendar
xsd:anySimpleType	java.lang.Object
xsd:anySimpleType	java.lang.String
xsd:duration	javax.xml.datatype.Duration
xsd:NOTATION	javax.xml.namespace.QName