将xsd转换为java时已定义错误

Question

我想把一组复杂的xsd文件转换成Java/Hibernate实体。为此，我从这个链接下载了JAXB的2.2.7版本。解压文件，打开cmd.exe，导航到create-marshal示例的目录，运行ant compile以确认一切正常，然后运行ant clean以消除结果，将一切返回到启动条件。

当我试图使用不同的xsd文件作为create-marshal示例的输入时，问题出现了。具体地说，当xsd文件通过更改相同标记类型的属性值来区分数据结构时，我会得到一个错误。在这种情况下，create-marshal示例给出了以下错误：

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<xs:schema targetNamespace="urn:the-publisher:v3" 
  xmlns:mif="urn:the-publisher:v3/mif" 
  xmlns="urn:the-publisher:v3"  
  xmlns:xs="http://www.w3.org/2001/XMLSchema" 
  elementFormDefault="qualified"  
  xmlns:sdtc="urn:the-publisher:sdtc">
<xs:annotation>
    <xs:documentation>Manually edited to add Schema Extensions, July 2012</xs:documentation>
    <xs:documentation>Generated using schema builder version 2.0. Stylesheets: RoseTreeToMIFStaticModel.xsl version: 1.1 StaticMifToXsd.xsl version 2.0</xs:documentation>
</xs:annotation>
<xs:complexType name="POCD_MT000040.InfrastructureRoot.typeId">
    <xs:complexContent>
        <xs:restriction base="II">
            <xs:attribute name="root" type="uid" 
              use="required" 
              fixed="2.16.840.1.113883.1.3"/>
            <xs:attribute name="extension" type="st" 
              use="required"/>
        </xs:restriction>
    </xs:complexContent>
</xs:complexType>
<xs:complexType name="POCD_MT000040.Act">
    <xs:sequence>
        <xs:element name="realmCode" type="CS" 
          minOccurs="0" 
          maxOccurs="unbounded"/>
        <xs:element name="typeId"
          type="POCD_MT000040.InfrastructureRoot.typeId" 
          minOccurs="0"/>
        <xs:element name="templateId" type="II" 
          minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="id" type="II" minOccurs="0" 
          maxOccurs="unbounded"/>
        <xs:element name="code" type="CD"/>
        <xs:element name="text" type="ED" minOccurs="0"/>
        <xs:element name="statusCode" type="CS" 
          minOccurs="0"/>
        <xs:element name="effectiveTime" type="IVL_TS" 
          minOccurs="0"/>
        <xs:element name="priorityCode" type="CE" 
          minOccurs="0"/>
        <xs:element name="languageCode" type="CS" 
          minOccurs="0"/>
        <xs:element name="subject" 
          type="POCD_MT000040.Subject" minOccurs="0"/>
        <xs:element name="specimen" 
          type="POCD_MT000040.Specimen" minOccurs="0" 
          maxOccurs="unbounded"/>
        <xs:element name="performer" 
          type="POCD_MT000040.Performer2" minOccurs="0" 
          maxOccurs="unbounded"/>
        <xs:element name="author" 
          type="POCD_MT000040.Author" minOccurs="0" 
          maxOccurs="unbounded"/>
        <xs:element name="informant" 
          type="POCD_MT000040.Informant12" 
          minOccurs="0" 
          maxOccurs="unbounded"/>
        <xs:element name="participant" 
          type="POCD_MT000040.Participant2" 
          minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="entryRelationship" 
          type="POCD_MT000040.EntryRelationship" 
          minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="reference" 
          type="POCD_MT000040.Reference" 
          minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="precondition" 
          type="POCD_MT000040.Precondition" 
          minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="nullFlavor" 
          type="NullFlavor" use="optional"/>
    <xs:attribute name="classCode" 
          type="x_ActClassDocumentEntryAct" use="required"/>
    <xs:attribute name="moodCode" type="x_DocumentActMood" 
          use="required"/>
    <xs:attribute name="negationInd" type="bl" 
          use="optional"/>
</xs:complexType>
<xs:complexType name="POCD_MT000040.AssignedAuthor">
    <xs:sequence>
        <xs:element name="realmCode" type="CS" 
          minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="typeId" 
          type="POCD_MT000040.InfrastructureRoot.typeId" 
          minOccurs="0"/>
        <xs:element name="templateId" type="II" 
          minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="id" type="II" 
          maxOccurs="unbounded"/>
        <xs:element name="code" type="CE" minOccurs="0"/>
        <xs:element name="addr" type="AD" 
          minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="telecom" type="TEL" 
          minOccurs="0" maxOccurs="unbounded"/>
        <xs:choice>
            <xs:element name="assignedPerson" 
          type="POCD_MT000040.Person" minOccurs="0"/>
            <xs:element name="assignedAuthoringDevice" 
          type="POCD_MT000040.AuthoringDevice" 
          minOccurs="0"/>
        </xs:choice>
        <xs:element name="representedOrganization" 
          type="POCD_MT000040.Organization" minOccurs="0"/>
    </xs:sequence>
    <xs:attribute name="nullFlavor" 
          type="NullFlavor" use="optional"/>
    <xs:attribute name="classCode" 
          type="RoleClassAssignedEntity" 
          use="optional" fixed="ASSIGNED"/>
</xs:complexType>

以下是错误消息的前几次迭代：

目标的构建序列`compile'是[compile]
完整的构建序列是[compile,javadoc,clean,run,]
compile:
[echo]编译架构...
[mkdir]创建dir:C:\temp\jaxb\apps\create-marshal\gen-src
[mkdir]创建dir:C:\temp\jaxb\apps\create-marshal\gen-src\primer\po
[xjc]xjc的构建id是2.2.7
[xjc]检查sdtc.xsd
[xjc]输入的最后修改时间是1409957672397
[xjc]输出的最后修改时间是-9223372036854775808
[xjc]编译文件:/c://temp/jaxb/apps/create-marshal/pocd_mt000040_sdtc.xsd
[xjc][ERROR]'pocd_mt000040.infrastructureroot.typeid'已定义
[xjc]文件sdtc.xsd
[xjc]
[xjc][ERROR]（与上面的错误有关）第一个定义出现在这里
[xjc]文件的第46行：/c://temp/jaxb/apps/create-marshal/infrastructure/cda/pocd_mt000040_sdtc.xsd
[xjc]
[xjc][ERROR]'pocd_mt000040.act'已定义
[xjc]文件：/c://temp/jaxb/apps/create-marshal/pocd_mt000040_sdtc.xsd
[xjc]第81行

....相同的错误重复多次，每次重复xs：complextype一次

[xjc]xjc任务失败。有关详细信息，请使用Ant-verbose开关
compile:duration 2 seconds
BUILD failed
c:\temp\jaxb\apps\create-marshal\BUILD.xml:29:无法解析架构。
在com.sun.tools.xjc.xjc2task._doxjc(xjc2task.java:520)
在com.sun.tools.xjc.xjc2task.doxjc(xjc2task.java:457)
在com.sun.tools.xjc.xjc2task.doxjc(xjc2task.java:457)
在com.sun.tools.xjc.xjc.task.execute(xjc2task.java:380)
accessorimpl.invoke0（原生方法）在sun.reflect.nativeMethodAccessorImpl.invoke(nativeMethodAccessorImpl.java:57)
在sun.reflect.delegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
在java.lang.reflect.Method.invoke(Method.java:606)
在get.execute(Target.java:435)
在org.apache.tools.ant.target.performTasks(Target.java:456)
在org.apache.tools.ant.Project.executeSortedTargets（项目）.java:1393)
在org.apache.tools.ant.project.executeTarget(Project.java:1364)
在org.apache.tools.ant.helper.defaultExecutor.executeTargets(DefaultExecutor.java:41)
在org.apache.tools.ant.project.executeTargets(Project.java:1248)
在org.apache.tools.ant.main.runbuild java:280)
位于org.apache.tools.ant.launch.launcher.main（launcher.java:109)

下面是ant构建文件：

<?xml version="1.0" standalone="yes"?>
<!--  Copyright 2004 Sun Microsystems, Inc. All rights reserved. -->
<project basedir="." default="run">
<description>This sample application demonstrates how to use the ObjectFactory class to create a Java content tree from scratch and marshal it to XML data. It also demonstrates how to add content to a JAXB List property.</description>
<record name="build.log" loglevel="verbose" action="start"/>
<property name="jaxb.home" value="../.." />
<path id="classpath">
    <pathelement path="src" />
    <pathelement path="classes" />
    <pathelement path="schemas" />
    <fileset dir="${jaxb.home}" includes="lib/*.jar" />
</path>
<taskdef name="xjc" classname="com.sun.tools.xjc.XJCTask">
    <classpath refid="classpath" />
</taskdef>
<!--compile Java source files-->
<target name="compile" description="Compile all Java source files">
    <echo message="Compiling the schema..." />
    <mkdir dir="gen-src" />
    <mkdir dir="gen-src/primer/po" />
    <xjc schema="POCD_MT000040_SDTC.xsd" package="primer.po" destdir="gen-src">
        <produces dir="gen-src/primer/po" includes="**/*.java" />
    </xjc>
    <echo message="Compiling the java source files..." />
    <mkdir dir="classes" />
    <javac destdir="classes" debug="on">
      <src path="src" />
      <src path="gen-src" />
      <classpath refid="classpath" />
    </javac>
  </target>
  <target name="run" depends="compile" description="Run the sample app">
    <echo message="Running the sample application..." />
    <java classname="Main" fork="true">
      <classpath refid="classpath" />
    </java>
  </target>
  <target name="javadoc" description="Generates javadoc" depends="compile">
    <echo message="Generating javadoc..." />
    <mkdir dir="docs/api" />
    <javadoc sourcepath="gen-src" destdir="docs/api" windowtitle="create-marshal (formerly SampleApp3)" useexternalfile="yes">
      <fileset dir="." includes="gen-src/**/*.java" excludes="**/impl/**/*.java" />
    </javadoc>
  </target>
  <target name="clean" description="Deletes all the generated artifacts.">
    <delete dir="docs/api" />
    <delete dir="gen-src" />
    <delete dir="schemas" />
    <delete dir="classes" />
  </target>
</project>

Answer 1

您报告的错误表明，不知何故，ant被指示读取相同的XML模式定义两次。实际上，错误消息说一个定义在

C:\Temp\jaxb\apps\create-marshal\POCD_MT000040_SDTC.xsd

另一个是在

...\create-marshal\infrastructure\cda\POCD_MT000040_SDTC.xsd

您应该清理create-marshal下面的文件树。您需要这两个文件中的一个，并且，与此文件相对应的是它所包含的那些，例如：

..\coreschemas\datatypes.xsd
..\coreschemas\voc.xsd
..\coreschemas\NarrativeBlock.xsd

<xs:complexType name="POCD_MT000040.ObservationMedia">
    ...
    <xs:element name="id" type="II" minOccurs="0" maxOccurs="unbounded"/>
    ...
  <xs:attribute name="ID" type="xs:ID"/>

<bindings xmlns="http://java.sun.com/xml/ns/jaxb"
      xmlns:xs="http://www.w3.org/2001/XMLSchema"
      version="2.1">

<bindings schemaLocation="./POCD_MT000040.xsd" node="/xs:schema">
    <bindings node="//xs:complexType[@name='POCD_MT000040.ObservationMedia']/xs:attribute[@name='ID']">
        <property name="xsid"/>
    </bindings>
</bindings>

<bindings schemaLocation="./POCD_MT000040.xsd" node="/xs:schema">
    <bindings node="//xs:complexType[@name='POCD_MT000040.RegionOfInterest']/xs:attribute[@name='ID']">
        <property name="xsid"/>
    </bindings>
</bindings>

<bindings schemaLocation="./POCD_MT000040.xsd" node="/xs:schema">
    <bindings node="//xs:complexType[@name='POCD_MT000040.Section']/xs:attribute[@name='ID']">
        <property name="xsid"/>
    </bindings>
</bindings>
</bindings>

您必须将绑定文件添加到xjc调用中。在ant中，这将是 @binding:

<xjc schema="POCD_MT000040_SDTC.xsd" binding="rename.xjb" ...