java中提供了xjc.exe可以将xds转成类方法，但是用命令行导CDA.xds是报如下错误：

Exception in thread "main"java.lang.IllegalArgumentException:tryingtocreatethesamefieldtwice:id

at com.sun.codemodel.JDefinedClass.field(JDefinedClass.java:419)

at com.sun.codemodel.JDefinedClass.field(JDefinedClass.java:390)

at com.sun.tools.xjc.generator.bean.field.AbstractFieldWithVar.createField(AbstractFieldWithVar.java:71)

at com.sun.tools.xjc.generator.bean.field.SingleField.(SingleField.java:89)

at com.sun.tools.xjc.generator.bean.field.SingleField.(SingleField.java:76)

at sun.reflect.GeneratedConstructorAccessor10.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

atjava.lang.reflect.Constructor.newInstance(Unknown Source)

at com.sun.tools.xjc.generator.bean.field.GenericFieldRenderer.generate(GenericFieldRenderer.java:64)

at com.sun.tools.xjc.generator.bean.field.DefaultFieldRenderer.generate(DefaultFieldRenderer.java:75)

at com.sun.tools.xjc.generator.bean.BeanGenerator.generateFieldDecl(BeanGenerator.java:744)

at com.sun.tools.xjc.generator.bean.BeanGenerator.generateClassBody(BeanGenerator.java:532)

at com.sun.tools.xjc.generator.bean.BeanGenerator.(BeanGenerator.java:234)

at com.sun.tools.xjc.generator.bean.BeanGenerator.generate(BeanGenerator.java:174)

at com.sun.tools.xjc.model.Model.generateCode(Model.java:286)

at com.sun.tools.xjc.Driver.run(Driver.java:343)

at com.sun.tools.xjc.Driver.run(Driver.java:191)

at com.sun.tools.xjc.Driver._main(Driver.java:116)

at com.sun.tools.xjc.Driver.access$000(Driver.java:74)

at com.sun.tools.xjc.Driver$1.run(Driver.java:96)

原来是ID和id在Java中冲突所致，参考了一篇技术文档搞定。

1）在源POCD_MT000040.xsd文件中

ID" type="xs:ID">

替换成：

ID" type="xs:ID">

ID1">

2）在源POCD_MT000040.xsd头中添加

xmlns:mif="urn:hl7-org:v3/mif"

xmlns="urn:hl7-org:v3"

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"

elementFormDefault="qualified"

jaxb:version="1.0"

jaxb:extensionBindingPrefixes="xjc">

3）最后执行命令行 xjc -extension CDA.xsd 搞定

-extension         :  allow vendor extensions - do not strictly follow the

Compatibility Rules and App E.2 from the JAXB Spec