解决项目和ant库之间的版本冲突

Question

我正在尝试使用Ant和Eclipse构建一个大型Java项目。因此，有许多引用的jar库，包括asm.jar，它由Ant使用（默认情况下，版本2.2.3在我的ANT_HOME / lib中）。现在碰巧我需要为我的项目使用不同版本的asm.jar（具体来说，3.0）。

但是，每当我尝试从命令行运行我的ant构建脚本时，它最终会加载asm-2.2.3.jar而不是asm-3.0.jar。我该如何解决这个冲突？

详细说明：

首先，我的build.xml文件：

<project name="MyProject" default="all" basedir=".">

<property name="runtime.jar" value="mp3.jar"/>
<property name="src" location="src"/>
<property name="build" location="build"/>
<property name="dist" location="dist"/>
<property name="test" location="test/unit/src" />
<property name="testclasses" location="test/unit/classes" />

<property name="project.lib" location="lib"/>
<property name="project.lib.jar" location="${project.lib}/jars"/>
<property name="project.lib.conf" location="${project.lib}/conf"/>
<property name="project.lib.gameconfigs" location="gameconfigs"/>
<property name="project.lib.images" location="${project.lib}/images"/>
<property name="project.classes" location="${build}"/>

<property name="project.doc" location="doc"/>
<property name="project.doc.java" location="${project.doc}/javadoc"/>
<property name="project.src" location="src"/>
<property name="experiments.src" location="experiments"/> 
<property name="project.gui" location="gui"/>
<property name="project.agents" location="agents"/>
<property name="project.webctrl" location="webctrl"/>
<property name="project.web" location="webctrl/web"/>
<property name="project.webinf" location="webctrl/web/WEB-INF"/>

<path id="project.classpath">
    <fileset dir=".">
        <include name="lib/jars/*.jar"/>
    </fileset>

</path>

<path id="test.classpath">
    <pathelement location="lib/jars/junit-4.8.2.jar" />
    <pathelement location="${test}" />
    <pathelement location="${testclasses}" />
    <pathelement location="${project.classes}"/>
    <path refid="project.classpath" />
</path>

<!-- Import build specific targets for building MyProject -->
<import file="lib/conf/ant/ct-build.xml" as="ct-build"/>

</project>

现在，引用导入的相关部分：

<target name="init">
    <!-- Create the time stamp -->
    <tstamp/>
    <!-- Create the build directory structure used by compile -->
    <mkdir dir="${build}"/>
</target>

<available property="unjar.done" file="${build}/org/apache/log4j/Appender.class"/>

<target name="unjar" depends="init" description="unjar the jars" unless="unjar.done">
    <unjar src="${project.lib.jar}/mysql-connector-java-5.1.7-bin.jar" dest="${build}"/>
    <unjar src="${project.lib.jar}/commons-codec-1.3.jar" dest="${build}"/>
    <unjar src="${project.lib.jar}/forms_rt.jar" dest="${build}"/>
    <unjar src="${project.lib.jar}/activemq-all-5.4.2.jar" dest="${build}"/>
    <unjar src="${project.lib.jar}/log4j-1.2.14.jar" dest="${build}"/>
    <unjar src="${project.lib.jar}/junit-4.8.2.jar" dest="${build}"/>
    <unjar src="${project.lib.jar}/asm.jar" dest="${build}"/>
    <unjar src="${project.lib.jar}/javac2.jar" dest="${build}"/>
    <property name="unjar.done" value="true" />
</target>


<target name="compile" depends="unjar"
    description="compile the source " >
    <!-- Compile the java code from ${src} into ${build} -->
    <mkdir dir="${build}/gnu/getopt"/>
    <copy todir="${build}/gnu/getopt">
        <fileset dir="${src}/gnu/getopt">
            <include name="*.properties"/>
        </fileset>
    </copy>


    <taskdef
            name="uidesigner"
            classname="com.intellij.uiDesigner.ant.Javac2"
            classpathref="project.classpath"/>

    <uidesigner
        destdir="${project.classes}"
        debug="on"
        source="1.5"
        includeantruntime="false">
        <src path="${project.src}"/>
        <src path="${project.gui}"/>
        <src path="${project.agents}"/>
        <src path="${experiments.src}"/>
        <include name="**/*.java"/>
        <include name="**/*.form"/>
        <classpath refid="project.classpath"/>
        <classpath path="${project.src}"/>
        <classpath path="${project.classes}"/>
        <exclude name="misc/**"/>
        <exclude name="docs/**"/>
    </uidesigner>
</target>

值得注意的是，在Eclipse中编写此代码会给我一个警告，即无法找到project.classpath（在导入的文件中）。但是，从命令行运行ant时，找到Javac2.class似乎没有问题。相反，我只是得到错误，说asm.jar中的方法丢失（我已经确定是由于加载了错误的版本）。见下文：

compile:
[uidesigner] classpath=
E:\Repositories\MyProject\mp3\build;
E:\Repositories\MyProject\mp3\lib\jars\activemq-all-5.4.2.jar;
E:\Repositories\MyProject\mp3\lib\jars\asm-commons-3.0.jar;
E:\Repositories\MyProject\mp3\lib\jars\asm.jar;
E:\Repositories\MyProject\mp3\lib\jars\bcel.jar;
E:\Repositories\MyProject\mp3\lib\jars\commons-codec-1.3.jar;
E:\Repositories\MyProject\mp3\lib\jars\forms-1.1-preview.jar;
E:\Repositories\MyProject\mp3\lib\jars\forms_rt.jar;
E:\Repositories\MyProject\mp3\lib\jars\javac2.jar;
E:\Repositories\MyProject\mp3\lib\jars\jdom.jar;
E:\Repositories\MyProject\mp3\lib\jars\junit-4.8.2.jar;
E:\Repositories\MyProject\mp3\lib\jars\log4j-1.2.14.jar;
E:\Repositories\MyProject\mp3\lib\jars\mysql-connector-java-5.1.7-bin.jar;
E:\Repositories\MyProject\mp3\lib\jars\xerces.jar;
E:\Repositories\MyProject\mp3\src;E:\Repositories\MyProject\mp3\build;
E:\apache-ant-1.9.2\lib\ant-launcher.jar;
E:\Repositories\MyProject\mp3\.\;
C:\Program Files (x86)\Java\jre7\lib\ext\QTJava.zip;
E:\apache-ant-1.9.2\lib\activation-1.1.jar;
E:\apache-ant-1.9.2\lib\ant-antlr.jar;
E:\apache-ant-1.9.2\lib\ant-apache-bcel.jar;
E:\apache-ant-1.9.2\lib\ant-apache-bsf.jar;
E:\apache-ant-1.9.2\lib\ant-apache-log4j.jar;
E:\apache-ant-1.9.2\lib\ant-apache-oro.jar;
E:\apache-ant-1.9.2\lib\ant-apache-regexp.jar;
E:\apache-ant-1.9.2\lib\ant-apache-resolver.jar;
E:\apache-ant-1.9.2\lib\ant-apache-xalan2.jar;
E:\apache-ant-1.9.2\lib\ant-commons-logging.jar;
E:\apache-ant-1.9.2\lib\ant-commons-net.jar;
E:\apache-ant-1.9.2\lib\ant-jai.jar;
E:\apache-ant-1.9.2\lib\ant-javamail.jar;
E:\apache-ant-1.9.2\lib\ant-jdepend.jar;
E:\apache-ant-1.9.2\lib\ant-jmf.jar;
E:\apache-ant-1.9.2\lib\ant-jsch.jar;
E:\apache-ant-1.9.2\lib\ant-junit.jar;
E:\apache-ant-1.9.2\lib\ant-junit4.jar;
E:\apache-ant-1.9.2\lib\ant-launcher.jar;
E:\apache-ant-1.9.2\lib\ant-netrexx.jar;
E:\apache-ant-1.9.2\lib\ant-swing.jar;
E:\apache-ant-1.9.2\lib\ant-testutil.jar;
E:\apache-ant-1.9.2\lib\ant.jar;
E:\apache-ant-1.9.2\lib\antlr-2.7.7.jar;
E:\apache-ant-1.9.2\lib\asm-2.2.3.jar;
E:\apache-ant-1.9.2\lib\asm-commons-2.2.3.jar;
E:\apache-ant-1.9.2\lib\asm-tree-2.2.3.jar;
E:\apache-ant-1.9.2\lib\bcel-5.1.jar;
E:\apache-ant-1.9.2\lib\bsf-2.4.0.jar;
E:\apache-ant-1.9.2\lib\bsh-2.0b4.jar;
E:\apache-ant-1.9.2\lib\bsh-core-2.0b4.jar;
E:\apache-ant-1.9.2\lib\commons-logging-1.0.4.jar;
E:\apache-ant-1.9.2\lib\commons-logging-api-1.1.jar;
E:\apache-ant-1.9.2\lib\commons-net-1.4.1.jar;
E:\apache-ant-1.9.2\lib\hamcrest-core-1.3.jar;
E:\apache-ant-1.9.2\lib\jai-codec-1.1.3.jar;
E:\apache-ant-1.9.2\lib\jai-core-1.1.3.jar;
E:\apache-ant-1.9.2\lib\jasper-compiler-4.1.36.jar;
E:\apache-ant-1.9.2\lib\jasper-runtime-4.1.36.jar;
E:\apache-ant-1.9.2\lib\jdepend-2.9.1.jar;
E:\apache-ant-1.9.2\lib\jruby-0.9.8.jar;
E:\apache-ant-1.9.2\lib\js-1.6R7.jar;
E:\apache-ant-1.9.2\lib\jsch-0.1.50.jar;
E:\apache-ant-1.9.2\lib\junit-4.11.jar;
E:\apache-ant-1.9.2\lib\log4j-1.2.14.jar;
E:\apache-ant-1.9.2\lib\mail-1.4.jar;
E:\apache-ant-1.9.2\lib\maven-artifact-ant-2.0.4-dep.jar;
E:\apache-ant-1.9.2\lib\NetRexxC.jar;
E:\apache-ant-1.9.2\lib\oro-2.0.8.jar;
E:\apache-ant-1.9.2\lib\regexp-1.2.jar;
E:\apache-ant-1.9.2\lib\regexp-1.3.jar;
E:\apache-ant-1.9.2\lib\serializer-2.7.1.jar;
E:\apache-ant-1.9.2\lib\servlet-api-2.3.jar;
E:\apache-ant-1.9.2\lib\which-1.0.jar;
E:\apache-ant-1.9.2\lib\xalan-2.7.1.jar;
E:\apache-ant-1.9.2\lib\xml-apis-1.3.04.jar;
E:\apache-ant-1.9.2\lib\xml-resolver-1.2.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\lib\tools.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\resources.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\rt.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\jsse.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\jce.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\charsets.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\ext;
C:\Windows\Sun\Java\lib\ext\dnsns.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\ext;
C:\Windows\Sun\Java\lib\ext\localedata.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\ext;
C:\Windows\Sun\Java\lib\ext\sunjce_provider.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\ext;
C:\Windows\Sun\Java\lib\ext\sunmscapi.jar;
C:\Program Files (x86)\Java\jdk1.6.0_26\jre\lib\ext;C:\Windows\Sun\Java\lib\ext\sunpkcs11.jar
BUILD FAILED
E:\Repositories\MyProject\mp3\lib\conf\ant\ct-build.xml:49: java.lang.NoSuchMethodError: org.objectweb.asm.ClassWriter.<init>(I)V
    at com.intellij.ant.AntClassWriter.<init>(AntClassWriter.java:13)
    at com.intellij.ant.Javac2.instrumentForms(Javac2.java:134)
    at com.intellij.ant.Javac2.compile(Javac2.java:50)
    at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:930)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:435)
    at org.apache.tools.ant.Target.performTasks(Target.java:456)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
    at org.apache.tools.ant.Main.runBuild(Main.java:851)
    at org.apache.tools.ant.Main.startAnt(Main.java:235)
    at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
    at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)

最后一点：我不知道为什么ant正在加载Java 6库而不是Java 7。