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

http://docs.oracle.com/javaee/5/tutorial/doc/bnazq.html

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

xjc command generation example

cd /tmp
mkdir -p xjctest/xsd
cd xjctest

nano simple.xjb

<jaxb:bindings xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns:jaxb="http://java.sun.com/xml/ns/jaxb"
           xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
           jaxb:extensionBindingPrefixes="xjc"
           jaxb:version="2.0">
  <jaxb:globalBindings generateValueClass="true">
    <xjc:simple />
    <xjc:serializable uid="12343"/> <!-- marks generated class as Serializable-->
    <jaxb:javaType name="java.util.Calendar" xmlType="xs:dateTime"
      parseMethod="javax.xml.bind.DatatypeConverter.parseDateTime"
      printMethod="javax.xml.bind.DatatypeConverter.printDateTime" />
  </jaxb:globalBindings>
</jaxb:bindings>

nano xsd/test,xsd

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>                                                                                                      
<xs:schema version="1.0" xmlns:xs="http://www.w3.org/2001/XMLSchema">                                                                                        
  <xs:element name="test" type="Test"/>                                                                                                                      
  <xs:complexType name="Test">                                                                                                                               
    <xs:sequence>                                                                                                                                            
      <xs:element name="name" type="xs:string" minOccurs="0"/>
      <xs:element name="birthDate" type="xs:dateTime" minOccurs="0"/>
      <xs:element name="dummyInt" type="xs:int" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
</xs:schema>

Run command

xjc xsd/test.xsd -b simple.xjb -extension -npa

parsing a schema...
compiling a schema...
generated/ObjectFactory.java
generated/Test.java
org/w3/_2001/xmlschema/Adapter1.java

To generate a proper Date it might be necessary to use an adapter for xjb.

== Generate with Maven==