在我的类路径上选择了 Java 的默认 JAXB 实现
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Java's default JAXB implementation is chosen over my classpath
提问by dacracot
I've written a java application that utilizes JAXB for XSL transforms. I've included the saxon9.jar in my classpath so that I can use XSLT 2.0 rather than XSLT 1.0 on the command line.
我编写了一个 Java 应用程序，它利用 JAXB 进行 XSL 转换。我已经在我的类路径中包含了 saxon9.jar，这样我就可以在命令行上使用 XSLT 2.0 而不是 XSLT 1.0。
java -classpath ./lib/saxon9.jar:./ -jar myApp.jar
I've included code in my XSL to report the XSLT used.
我在我的 XSL 中包含了代码来报告使用的 XSLT。
<xsl:comment><xsl:text >
</xsl:text>XSLT Version: <xsl:value-of select="system-property('xsl:version')" /> <xsl:text >
</xsl:text>XSLT Vendor: <xsl:value-of select="system-property('xsl:vendor')" /> <xsl:text >
</xsl:text>XSLT Vendor URL: <xsl:value-of select="system-property('xsl:vendor-url')" /> <xsl:text >
</xsl:text></xsl:comment>
It reports.
它报告。
XSLT Version: 1.0
XSLT Vendor: Apache Software Foundation (Xalan XSLTC)
XSLT Vendor URL: http://xml.apache.org/xalan-j
This is the default implementation that is part of the JVM.
这是作为 JVM 一部分的默认实现。
How do I get it to use the Saxon that I specified?
我如何让它使用我指定的撒克逊人？
Follow up:
跟进：
So none of these methods worked (except placing the saxon jar in the endorsed directory), but they all should have worked. It seems the combination of my using the "-jar myApp.jar" and wanting an alternative XSLT implementation were incompatible. In other words...
所以这些方法都没有奏效（除了将撒克逊罐放在认可目录中），但它们都应该有效。似乎我使用“-jar myApp.jar”和想要替代 XSLT 实现的组合是不兼容的。换句话说...
java -Djavax.xml.transform.TransformerFactory=net.sf.saxon.TransformerFactoryImpl -classpath ./lib/saxon9.jar:./ -jar myApp.jar
java -Djavax.xml.transform.TransformerFactory=net.sf.saxon.TransformerFactoryImpl -classpath ./lib/saxon9.jar:./ -jar myApp.jar
...does not work, but this does...
......不起作用，但这确实......
java -Djavax.xml.transform.TransformerFactory=net.sf.saxon.TransformerFactoryImpl -classpath ./lib/saxon9.jar:./myApp.jar org.dacracot.myApp
java -Djavax.xml.transform.TransformerFactory=net.sf.saxon.TransformerFactoryImpl -classpath ./lib/saxon9.jar:./myApp.jar org.dacracot.myApp
...interestingly, I don't even have to specify the factory and I get the saxon version...
...有趣的是，我什至不必指定工厂，我就得到了撒克逊版本...
java -classpath ./lib/saxon9.jar:./myApp.jar org.dacracot.myApp
java -classpath ./lib/saxon9.jar:./myApp.jar org.dacracot.myApp
回答by kgiannakakis
回答by nbeyer
Check out the javadoc for TransformerFactory.newInstance()for all the possible ways to configure the factory.
查看TransformerFactory.newInstance()的 javadoc，了解配置工厂的所有可能方法。
- System Property
- lib/jaxp.properties
- Services config file (may be in the saxon JAR, /META-INF/services/javax.xml.transform.TransformerFactory)
- 系统属性
- lib/jaxp.properties
- 服务配置文件（可能在 saxon JAR 中，/META-INF/services/javax.xml.transform.TransformerFactory）
回答by KitsuneYMG
The last example you posted(w/o -Djavax...) works because the META-INF/services directory contains a file named
您发布的最后一个示例（w/o -Djavax...）有效，因为 META-INF/services 目录包含一个名为
java.xml.transform.TransformerFactory
java.xml.transform.TransformerFactory
with the content
与内容
net.sf.saxon.TransformerFactoryImpl
net.sf.saxon.TransformerFactoryImpl
The reason using
使用的原因
java -cp lib/saxon9.jar;myjar.jar
works and
作品和
java -cp lib/saxon9.jar -jar myjar.jar
doesn't is that using the -jar option tells java(w).exe to ignore the rest of the command line and pull everything (classpath included) from the jar's manifest file. If you put saxon9.jar in your jar manifest's classpath it should work.
不是使用 -jar 选项告诉 java(w).exe 忽略命令行的其余部分并从 jar 的清单文件中提取所有内容（包括类路径）。如果您将 saxon9.jar 放在 jar 清单的类路径中，它应该可以工作。
Manifest-Version: 1.0
Main-Class: net.my.MainClass
Class-Path: lib/saxon9.jar
回答by McDowell
This system property should set the replacement TransformerFactory:
此系统属性应设置替换 TransformerFactory：
java -Djavax.xml.transform.TransformerFactory=com.foobar.AcmeTransformer MyApp
I believe the factory class you want is net.sf.saxon.TransformerFactoryImpl
我相信你想要的工厂类是net.sf.saxon.TransformerFactoryImpl
回答by Paul Tomblin
How about
怎么样
java -Xbootclasspath:lib/saxon9.jar -classpath . -jar myApp.jar
