不支持的绑定命名空间“”

Question

我有一个架构，JAXB 每次都能完美地生成 java 类。我试图让hyperjaxb 处理相同的模式。为此，我下载并解压了hyperjaxb maven 项目from this link，然后使用cmd.exe 导航到根目录 并通过运行mvn clean install 使用示例数据对其进行测试，以确保它适用于示例模式。然后我用在JAXB 中完美运行的完整shema 替换了schema.xsd、po.xml 和bindings.xjb 文件，包括许多导入的命名空间。然后我再次运行mvn clean install。但是，我收到以下错误消息：

[ERROR] Error while parsing schema(s).Location [ file:/C:/path/to/src/main/resources/schema.xsd{4,32}].
org.xml.sax.SAXParseException; systemId: file:/C:/path/to/src/main/resources/schema.xsd; 
lineNumber: 4; columnNumber: 32; Unsupported binding namespace "". 
Perhaps you meant "http://annox.dev.java.net"?

在示例中，schema.xsd 顶部的模式标记为：

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  xmlns:jaxb="http://java.sun.com/xml/ns/jaxb" jaxb:version="1.0">

相比之下，我的自定义架构使用：

<xs:schema targetNamespace="urn:some-org:v3" xmlns:mif="urn:some-org:v3/mif" xmlns="urn:some-org:v3"
    xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"
    xmlns:sdtc="urn:some-org:sdtc" xmlns:jaxb="http://java.sun.com/xml/ns/jaxb" jaxb:version="1.0">  

请注意我的自定义架构中架构标记中的xmlns="urn:some-org:v3"。它不包括像xmlns:somequalifier="urn:some-org:v3" 这样的限定符。这是造成问题的原因吗？它在没有限定符的 JAXB 中完美运行。遍历整个命名空间并在每种类型前面添加一个限定符将是一个很大的痛苦。

另外，也可能是示例项目的 pom.xml 中定义的结构（在上面链接的 zip 文件中）导致了问题。它们不同于基本的 JAXB 工具。

我怎样才能避免这个问题？最好不要为每种类型添加限定符。我的架构中有几千行。

堆栈跟踪的以下几行可能会有所帮助：

[ERROR] Error while parsing schema(s).Location [ file:/C:/path/to/src/main/resources/schema.xsd{4,32}].
org.xml.sax.SAXParseException; systemId: file:/C:/path/to/src/main/resources/schema.xsd; lineNumber: 4; columnNumber: 32; Unsupported binding namespace "". Perhaps you meant "http://annox.dev.java.net"?
    at com.sun.tools.xjc.reader.AbstractExtensionBindingChecker.error(AbstractExtensionBindingChecker.java:213)
    at com.sun.tools.xjc.reader.AbstractExtensionBindingChecker.checkAndEnable(AbstractExtensionBindingChecker.java:115)
    at com.sun.tools.xjc.reader.ExtensionBindingChecker.startElement(ExtensionBindingChecker.java:133)
    at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:551)
    at com.sun.tools.xjc.reader.xmlschema.parser.IncorrectNamespaceURIChecker.startElement(IncorrectNamespaceURIChecker.java:128)
    at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:551)
    at com.sun.tools.xjc.reader.xmlschema.parser.CustomizationContextChecker.startElement(CustomizationContextChecker.java:193)
    at org.xml.sax.helpers.XMLFilterImpl.startElement(XMLFilterImpl.java:551)
    at com.sun.tools.xjc.reader.internalizer.DOMForestScanner$LocationResolver.startElement(DOMForestScanner.java:147)
    at com.sun.xml.bind.unmarshaller.DOMScanner.visit(DOMScanner.java:244)
    at com.sun.xml.bind.unmarshaller.DOMScanner.scan(DOMScanner.java:127)
    at com.sun.tools.xjc.reader.internalizer.DOMForestScanner.scan(DOMForestScanner.java:92)
    at com.sun.tools.xjc.reader.internalizer.DOMForestScanner.scan(DOMForestScanner.java:100)
    at com.sun.tools.xjc.reader.internalizer.DOMForestParser.parse(DOMForestParser.java:104)
    at com.sun.tools.xjc.ModelLoader$XMLSchemaParser.parse(ModelLoader.java:269)
    at com.sun.xml.xsom.impl.parser.NGCCRuntimeEx.parseEntity(NGCCRuntimeEx.java:347)
    at com.sun.xml.xsom.impl.parser.ParserContext.parse(ParserContext.java:128)
    at com.sun.xml.xsom.parser.XSOMParser.parse(XSOMParser.java:168)
    at com.sun.xml.xsom.parser.XSOMParser.parse(XSOMParser.java:157)
    at com.sun.tools.xjc.ModelLoader.createXSOM(ModelLoader.java:534)
    at com.sun.tools.xjc.ModelLoader.loadXMLSchema(ModelLoader.java:378)
    at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:174)
    at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:119)
    at org.jvnet.mjiip.v_2_2.XJC22Mojo.loadModel(XJC22Mojo.java:50)
    at org.jvnet.mjiip.v_2_2.XJC22Mojo.doExecute(XJC22Mojo.java:40)
    at org.jvnet.mjiip.v_2_2.XJC22Mojo.doExecute(XJC22Mojo.java:28)
    at org.jvnet.jaxb2.maven2.RawXJC2Mojo.doExecute(RawXJC2Mojo.java:318)
    at org.jvnet.jaxb2.maven2.RawXJC2Mojo.execute(RawXJC2Mojo.java:161)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:106)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:317)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:555)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:214)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:158)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)

Answer 1

您看到的错误是由于缺少标记<property name="xsid"/> 上的前缀。正确的标签在下面

<jaxb:bindings node="//xs:complexType[@name='Section']/xs:attribute[@name='ID']">
    <jaxb:property name="xsid"/>
</jaxb:bindings>

无论如何，您的 XSD 有一些问题，因为 maven-jaxb2-plugin 可以生成所有类，而 maven-hyperjaxb3-plugin 是不可能的。

---

我建议解决您的整个问题。如果您不需要将生成的所有类标记为@Entity 或@Table，则可以使用以下配置。

XJB

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<jaxb:bindings
    version="2.1"
    xmlns:jaxb="http://java.sun.com/xml/ns/jaxb"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:annox="http://annox.dev.java.net"  >

    <jaxb:bindings schemaLocation="schema.xsd" node="/xs:schema">
        <jaxb:globalBindings generateIsSetMethod="true"/>
        <jaxb:schemaBindings>
            <jaxb:package name="org.jvnet.hyperjaxb3.ejb.tests.pocustomized"/>
        </jaxb:schemaBindings>
        <jaxb:bindings node="//xs:complexType[@name='InfrastructureRoot.typeId']">
            <annox:annotate>
                <annox:annotate annox:class="javax.persistence.Entity">
                </annox:annotate>
                <annox:annotate annox:class="javax.persistence.Table" name="typeId">
                </annox:annotate>
            </annox:annotate>
        </jaxb:bindings>
        <jaxb:bindings node="//xs:complexType[@name='ObservationMedia']/xs:attribute[@name='ID']">
            <jaxb:property name="xsid"/>
        </jaxb:bindings>
        <jaxb:bindings node="//xs:complexType[@name='RegionOfInterest']/xs:attribute[@name='ID']">
            <jaxb:property name="xsid"/>
        </jaxb:bindings>
        <jaxb:bindings node="//xs:complexType[@name='Section']/xs:attribute[@name='ID']">
            <jaxb:property name="xsid"/>
        </jaxb:bindings>


    </jaxb:bindings>

</jaxb:bindings>

Maven 插件

<plugin>
    <groupId>org.jvnet.jaxb2.maven2</groupId>
    <artifactId>maven-jaxb2-plugin</artifactId>
    <version>0.8.1</version>
    <executions>
        <execution>
            <phase>generate-sources</phase>
            <goals>
                <goal>generate</goal>
            </goals>
        </execution>
    </executions>
    <dependencies>
        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.0-api</artifactId>
            <version>1.0.1.Final</version>
        </dependency>
    </dependencies>
    <configuration>
        <args>
            <arg>-Xannotate</arg>
            <arg>-nv</arg>
        </args>
        <extension>true</extension>
        <schemaDirectory>src/main/resources/</schemaDirectory>
        <schemaIncludes>
            <schemaInclude>schema.xsd</schemaInclude>
        </schemaIncludes>
        <bindingDirectory>src/main/resources/</bindingDirectory>
        <bindingIncludes>
            <include>*.xjb</include>
        </bindingIncludes>
        <debug>true</debug>
        <verbose>true</verbose>
        <episode>true</episode>
        <forceRegenerate>true</forceRegenerate>
        <plugins>
            <plugin>
                <groupId>org.jvnet.jaxb2_commons</groupId>
                <artifactId>jaxb2-basics</artifactId>
                <version>0.6.3</version>
            </plugin>
            <plugin>
                <groupId>org.jvnet.jaxb2_commons</groupId>
                <artifactId>jaxb2-basics-annotate</artifactId>
                <version>0.6.3</version>
            </plugin>
        </plugins>
    </configuration>
</plugin>

不是最佳做法，但效果很好。