JAXB绑定到JAR中的模式 [英] JAXB Bindings to schemas in a JAR

问题描述

我正在使用maven jaxb2插件生成Java类，它是从jar中的模式构建的。但是，我不确定如何从绑定文件中正确定位这些模式。如果从jar中提取模式并将它们放在与绑定相同的目录中，那么一切都很好。但是，这不是一个实际的长期解决方案。

I'm using the maven jaxb2 plugin to generate Java classes, built from schemas in a jar. However, I'm not sure how to correctly locate to these schemas from a bindings file. If Iextract the schemas from the jar and drop them in the same directory as the bindings, all is well. However, this isn't a practical long term solution.

pom.xml：

<plugin>
 <groupId>org.jvnet.jaxb2.maven2</groupId>
  <artifactId>maven-jaxb2-plugin</artifactId>
  <version>0.8.1</version>
  <executions>
    <execution>
     <goals>
      <goal>generate</goal>
     </goals>
    </execution>
   </executions>
   <configuration>
    <schemas>
     <schema>
      <dependencyResource>
       <groupId>com.test</groupId>
       <artifactId>schemas</artifactId>
       <version>1.10-SNAPSHOT</version>
       <resource>schemas/schema.xsd</resource>
      </dependencyResource>
     </schema>
    </schemas>              
    <bindingDirectory>bindings</bindingDirectory>
    <generatePackage>test.package</generatePackage>
    <bindingIncludes>
     <include>*.xml</include>
    </bindingIncludes>
    <extension>true</extension>
   </configuration>
  </plugin>

bindings.xml：

bindings.xml:

<jxb:bindings xmlns:xs="http://www.w3.org/2001/XMLSchema" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
 xsi:schemaLocation="http://java.sun.com/xml/ns/jaxb ./bindingschema_2_1.xsd"
 version="2.1">

<jxb:bindings schemaLocation="classpath:/schemas/schema.xsd" node="/xs:schema">
  <jxb:bindings node="//xs:complexType[@name='AbstractChangeable']">
   <jxb:class implClass="com.test.AbstractEntity" />
  </jxb:bindings>
</jxb:bindings>

推荐答案

我想在这里工作的是什么喜欢：

What I'd like to have working here is something like:

<jaxb:bindings schemaLocation="maven:org.jvnet.jaxb2.maven2:maven-jaxb2-plugin-tests-po!/purchaseorder.xsd" node="/xs:schema">
    <jaxb:schemaBindings>
        <jaxb:package name="org.jvnet.jaxb2.maven2.tests.po"/>
    </jaxb:schemaBindings>      
</jaxb:bindings>

但目前还没有。请提出问题，我会尽力解决。

But it does not at the moment. Please file an issue, I'll try to fix it.

现在工作的是基于SCD的绑定：

What does work now is SCD-based binding:

<jaxb:bindings scd="x-schema::po" xmlns:po="urn:po">
    <jaxb:schemaBindings>
        <jaxb:package name="org.jvnet.jaxb2.maven2.tests.po"/>
    </jaxb:schemaBindings>      
</jaxb:bindings>

因此，您实际上不需要基于特定架构位置进行绑定，您可以基于命名空间URI，理论上更好。

So you don't actually need to bind based on a specific schema location, you can bind based on the namespace URI, which is theoretically better.

实际上，我有一种经验，即SCD绑定并不总能可靠地工作。

Practically I have an experience that SCD-bindings don't always work reliably.

更新

参见此链接了解更多信息JAXB中的SCD使用情况。

See this link for more information SCD usage in JAXB.

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