How to generate JAXB classes from XSD

Question

I m a total newbie with XML  I m doing a Java EE project REST implementation and we return a lot of XML  With this we decided to use JAXB  So far  we manually coded the Models for the XML   But there are already these complex structures we don t know how to code  We ve read about generating classes from XSD  We do have an XSD   My questions   1   I ve read about XJC  where can I find it    2   Do we have to install the whole JAXB   so what we used so far  isn t this JAXB

User · Answer

cxf does great support for this kind of stuff e g    lt plugin gt       lt groupId gt org apache cxf lt  groupId gt       lt artifactId gt cxf-xjc-plugin lt  artifactId gt       lt version gt 2 3 0 lt  version gt       lt configuration gt         lt extensions gt           lt extension gt org apache cxf xjcplugins cxf-xjc-dv 2 3 0 lt  extension gt         lt  extensions gt       lt  configuration gt       lt executions gt         lt execution gt           lt id gt generate-sources-trans lt  id gt           lt phase gt generate-sources lt  phase gt           lt goals gt             lt goal gt xsdtojava lt  goal gt           lt  goals gt           lt configuration gt             lt sourceRoot gt   basedir  src main java lt  sourceRoot gt             lt xsdOptions gt               lt xsdOption gt                 lt xsd gt src main resources xxx xsd lt  xsd gt               lt  xsdOption gt             lt  xsdOptions gt           lt  configuration gt         lt  execution gt       lt  executions gt     lt  plugin gt

User · Answer

In intellij click  xsd file                   -  WebServices                    - Generate Java code from Xml Schema JAXB                 then give package path and package name                    - ok

User · Answer

You can download the JAXB jar files from http   jaxb java net 2 2 5  You don t need to install anything  just invoke the xjc command and with classpath argument pointing to the downloaded JAXB jar files

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In Eclipse  right click on the xsd file you want to get --  Generate --  Java    --  Generator   Schema to JAXB Java Classes     I just faced the same problem  I had a bunch of xsd files  only one of them being the XML Root Element and it worked well what I explained above in Eclipse

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XJC is included in the bin directory in the JDK starting with Java SE 6   For an example see    http   blog bdoughan com 2010 09 processing-atom-feeds-with-jaxb html   The contents of the blog are the following   Processing Atom Feeds with JAXB Atom is an XML format for representing web feeds   A standard format allows reader applications to display feeds from different sources   In this example we will process the Atom feed for this blog   Demo  In this example we will use JAXB to convert the Atom XML feed corresponding to this blog to objects and then back to XML   import java io InputStream  import java net URL  import javax xml bind    import javax xml transform stream StreamSource  import org w3  2005 atom FeedType   public class Demo        public static void main String   args  throws Exception           JAXBContext jc   JAXBContext newInstance  org w3  2005 atom             Unmarshaller unmarshaller   jc createUnmarshaller            URL url   new URL  http   bdoughan blogspot com atom xml            InputStream xml   url openStream            JAXBElement lt feedtype gt  feed   unmarshaller unmarshal new StreamSource xml   FeedType class           xml close             Marshaller marshaller   jc createMarshaller            marshaller setProperty Marshaller JAXB FORMATTED OUTPUT  true           marshaller marshal feed  System out              JAXB Model  The following model was generated by the schema to Java compiler  XJC   I have omitted the get set methods and comments to save space   xjc -d generated http   www kbcafe com rss atom xsd xml   package-info   XmlSchema          namespace    http   www w3 org 2005 Atom           elementFormDefault   XmlNsForm QUALIFIED   XmlAccessorType XmlAccessType FIELD  package org w3  2005 atom   import javax xml bind annotation      CategoryType  package org w3  2005 atom   import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    categoryType   public class CategoryType        XmlAttribute required   true      protected String term        XmlAttribute      XmlSchemaType name    anyURI       protected String scheme        XmlAttribute     protected String label        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         Content Type  package org w3  2005 atom   import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    contentType   propOrder     content    public class ContentType        XmlMixed      XmlAnyElement lax   true      protected List lt Object gt  content        XmlAttribute     protected String type        XmlAttribute      XmlSchemaType name    anyURI       protected String src        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         DateTimeType  package org w3  2005 atom   import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml datatype XMLGregorianCalendar  import javax xml namespace QName    XmlType name    dateTimeType   propOrder     value    public class DateTimeType        XmlValue      XmlSchemaType name    dateTime       protected XMLGregorianCalendar value        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         EntryType  package org w3  2005 atom   import java util    import javax xml bind JAXBElement  import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    entryType   propOrder     authorOrCategoryOrContent    public class EntryType        XmlElementRefs            XmlElementRef name    id   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    rights   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    summary   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    title   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    author   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    source   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    updated   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    category   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    content   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    published   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    contributor   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    link   namespace    http   www w3 org 2005 Atom   type   JAXBElement class              XmlAnyElement lax   true      protected List lt Object gt  authorOrCategoryOrContent        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         FeedType  package org w3  2005 atom   import java util    import javax xml bind JAXBElement  import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    feedType   propOrder     authorOrCategoryOrContributor    public class FeedType        XmlElementRefs            XmlElementRef name    link   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    updated   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    category   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    rights   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    contributor   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    title   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    id   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    generator   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    icon   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    subtitle   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    author   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    entry   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    logo   namespace    http   www w3 org 2005 Atom   type   JAXBElement class              XmlAnyElement lax   true      protected List lt Object gt  authorOrCategoryOrContributor        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         GeneratorType  package org w3  2005 atom   import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    generatorType   propOrder     value    public class GeneratorType        XmlValue     protected String value        XmlAttribute      XmlSchemaType name    anyURI       protected String uri        XmlAttribute     protected String version        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         IconType  package org w3  2005 atom   import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    iconType   propOrder     value    public class IconType        XmlValue      XmlSchemaType name    anyURI       protected String value        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         IdType  package org w3  2005 atom   import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    idType   propOrder     value    public class IdType        XmlValue      XmlSchemaType name    anyURI       protected String value        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         LinkType  package org w3  2005 atom   import java math BigInteger  import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    linkType   propOrder     content    public class LinkType        XmlValue     protected String content        XmlAttribute required   true       XmlSchemaType name    anyURI       protected String href        XmlAttribute     protected String rel        XmlAttribute     protected String type        XmlAttribute      XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    NMTOKEN       protected String hreflang        XmlAttribute     protected String title        XmlAttribute      XmlSchemaType name    positiveInteger       protected BigInteger length        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         LogoType  package org w3  2005 atom   import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    logoType   propOrder     value    public class LogoType        XmlValue      XmlSchemaType name    anyURI       protected String value        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         PersonType  package org w3  2005 atom   import java util    import javax xml bind JAXBElement  import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    personType   propOrder     nameOrUriOrEmail    public class PersonType        XmlElementRefs            XmlElementRef name    email   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    name   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    uri   namespace    http   www w3 org 2005 Atom   type   JAXBElement class              XmlAnyElement lax   true      protected List lt Object gt  nameOrUriOrEmail        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         SourceType  package org w3  2005 atom   import java util    import javax xml bind JAXBElement  import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    sourceType   propOrder     authorOrCategoryOrContributor    public class SourceType        XmlElementRefs            XmlElementRef name    updated   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    category   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    subtitle   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    logo   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    generator   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    icon   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    title   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    id   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    author   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    contributor   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    link   namespace    http   www w3 org 2005 Atom   type   JAXBElement class            XmlElementRef name    rights   namespace    http   www w3 org 2005 Atom   type   JAXBElement class              XmlAnyElement lax   true      protected List lt Object gt  authorOrCategoryOrContributor        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         TextType  package org w3  2005 atom   import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    textType   propOrder     content    public class TextType        XmlMixed      XmlAnyElement lax   true      protected List lt Object gt  content        XmlAttribute      XmlJavaTypeAdapter CollapsedStringAdapter class      protected String type        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt         UriType  package org w3  2005 atom   import java util    import javax xml bind annotation    import javax xml bind annotation adapters    import javax xml namespace QName    XmlType name    uriType   propOrder     value    public class UriType        XmlValue      XmlSchemaType name    anyURI       protected String value        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlSchemaType name    anyURI       protected String base        XmlAttribute namespace    http   www w3 org XML 1998 namespace        XmlJavaTypeAdapter CollapsedStringAdapter class       XmlSchemaType name    language       protected String lang        XmlAnyAttribute     private Map lt QName  String gt  otherAttributes   new HashMap lt QName  String gt

User · Answer

Download      http   java net downloads jaxb-workshop IDE 20plugins org jvnet jaxbw zip Extract the zip file   Place the org jvnet jaxbw eclipse 1 0 0 folder into  eclipse plugins folder  Restart the eclipse  Right click on XSD file and you can find contect menu  JAXB 2 0 -  Run XJC

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You can also generate source code from schema using jaxb2-maven-plugin plugin            lt plugin gt               lt groupId gt org codehaus mojo lt  groupId gt               lt artifactId gt jaxb2-maven-plugin lt  artifactId gt               lt version gt 2 2 lt  version gt               lt executions gt                   lt execution gt                       lt goals gt                           lt goal gt xjc lt  goal gt                       lt  goals gt                   lt  execution gt               lt  executions gt               lt configuration gt                   lt sources gt                       lt source gt src main resources your schema xsd lt  source gt                   lt  sources gt                   lt xjbSources gt                       lt xjbSource gt src main resources bindings xjb lt  xjbSource gt                   lt  xjbSources gt                   lt packageName gt some package lt  packageName gt                   lt outputDirectory gt src main java lt  outputDirectory gt                   lt clearOutputDir gt false lt  clearOutputDir gt                   lt generateEpisode gt false lt  generateEpisode gt                   lt noGeneratedHeaderComments gt true lt  noGeneratedHeaderComments gt               lt  configuration gt           lt  plugin gt

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For Eclipse STS  3 5 at least  you don t need to install anything  Right click on schema xsd - gt  Generate - gt  JAXB Classes  You ll have to specify the package  amp  location in the next step and that s all  your classes should be generated  I guess all the above mentioned solutions work  but this seems by far the easiest  for STS users    UPDATE  Eclipse STS version 3 6  based on Kepler  comes with the same functionality

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1  You can use standard java utility xjc -   your java home dir  bin xjc exe   But you need to create  bat  or  sh  script for using it   e g  generate bat    your java home dir  bin xjc exe  1  2  3   e g  test-scheme xsd    lt  xml version  1 0   gt   lt xs schema version  1 0             xmlns xs  http   www w3 org 2001 XMLSchema             elementFormDefault  qualified              targetNamespace  http   myprojects net xsd TestScheme             xmlns  http   myprojects net xsd TestScheme  gt       lt xs element name  employee  type  PersonInfoType   gt        lt xs complexType name  PersonInfoType  gt           lt xs sequence gt               lt xs element name  firstname  type  xs string   gt               lt xs element name  lastname  type  xs string   gt           lt  xs sequence gt       lt  xs complexType gt   lt  xs schema gt    Run  bat file with parameters  generate bat test-scheme xsd -d  your src dir   For more info use this documentation - http   docs oracle com javaee 5 tutorial doc bnazg html   and this - http   docs oracle com javase 6 docs technotes tools share xjc html  2  JAXB  xjc utility  is installed together with JDK6 by default

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If you re using Eclipse  you can also try out JAXB Eclipse Plug-In  You can find more information about XJC Binding Compiler that comes with the jdk installation over here  xjc   Java    Architecture for XML Binding -Binding Compiler   I hope this helps

[java] How to generate JAXB classes from XSD?

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