java - 如何使用最新的 JVM 构建 xerces-j 2.11？

Question

我已经从 https://svn.apache.org/repos/asf/xerces/java/tags/Xerces-J_2_11_0 中检查了 xerces-j 2.11| .现在我想构建它，但在编译过程中出现以下错误:

compile:
   [xjavac] Compiling 596 source files to C:\Users\abrieg\workingcopy\xerces-trunk\build\classes
   [xjavac] C:\Users\abrieg\workingcopy\xerces-trunk\build\src\org\apache\html\dom\HTMLFrameElementImpl.java:28: error: HTMLFrameElementImpl is not abstract and does not override abstract method getContentDocument() in HTMLFrameElement
   [xjavac] public class HTMLFrameElementImpl
   [xjavac]        ^
   [xjavac] C:\Users\abrieg\workingcopy\xerces-trunk\build\src\org\apache\html\dom\HTMLIFrameElementImpl.java:28: error: HTMLIFrameElementImpl is not abstract and does not override abstract method getContentDocument() in HTMLIFrameElement
   [xjavac] public class HTMLIFrameElementImpl
   [xjavac]        ^
   [xjavac] C:\Users\abrieg\workingcopy\xerces-trunk\build\src\org\apache\html\dom\HTMLObjectElementImpl.java:28: error: HTMLObjectElementImpl is not abstract and does not override abstract method getContentDocument() in HTMLObjectElement
   [xjavac] public class HTMLObjectElementImpl
   [xjavac]        ^
   [xjavac] Note: Some input files use or override a deprecated API.
   [xjavac] Note: Recompile with -Xlint:deprecation for details.
   [xjavac] Note: Some input files use unchecked or unsafe operations.
   [xjavac] Note: Recompile with -Xlint:unchecked for details.
   [xjavac] 3 errors

问题是 xjavac 任务不使用 /tools/xml-apis.jar 中的类，而是使用 jdk 的 rt.jar。编译在以下 VM 中运行:

java version "1.8.0_31"
Java(TM) SE Runtime Environment (build 1.8.0_31-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.31-b07, mixed mode)

我已经使用认可的库覆盖机制将 xerces-j 2.11 的 xml-apis.jar 放入虚拟机中，但这没有用。

xjavac 调用定义为

<xjavac srcdir="${build.src}"
       destdir="${build.dest}"
       source="${javac.source}"
       target="${javac.target}"
       classpath="${build.dir}/classes:${tools.dir}/${jar.apis}:${tools.dir}/${jar.resolver}:${tools.dir}/${jar.serializer}"
       debug="${debug}"
       debuglevel="${debuglevel}"
       deprecation="${deprecation}"
       optimize="${optimize}"
       includeAntRuntime="false"
       includeJavaRuntime="false"
       excludes="org/xml/sax/** 
            javax/xml/**
            org/w3c/dom/*
            org/w3c/dom/bootstrap/**
            org/w3c/dom/events/**
            org/w3c/dom/ls/**
            org/w3c/dom/html/**
            org/w3c/dom/ranges/**
            org/w3c/dom/traversal/**
            org/w3c/dom/views/**
            org/w3c/dom/xpath/**"
       />

我如何确保 xml-apis.jar 用于编译而不是我的 JVM 中的类？

Answer 1

您需要将 xml-apis.jar添加到bootstrap classes Javac 的。

<xjavac srcdir="${build.src}"
       destdir="${build.dest}"
       source="${javac.source}"
       target="${javac.target}"
       classpath="${build.dir}/classes:${tools.dir}/${jar.apis}:${tools.dir}/${jar.resolver}:${tools.dir}/${jar.serializer}"
       debug="${debug}"
       debuglevel="${debuglevel}"
       deprecation="${deprecation}"
       optimize="${optimize}"
       includeAntRuntime="false"
       includeJavaRuntime="false"
       excludes="org/xml/sax/** 
            javax/xml/**
            org/w3c/dom/*
            org/w3c/dom/bootstrap/**
            org/w3c/dom/events/**
            org/w3c/dom/ls/**
            org/w3c/dom/html/**
            org/w3c/dom/ranges/**
            org/w3c/dom/traversal/**
            org/w3c/dom/views/**
            org/w3c/dom/xpath/**"
       >
       <compilerarg line="-Xbootclasspath/p:${tools.dir}/${jar.apis}"/>
</xjavac>