构建文件的Java与外部罐(Buildfile for Java with external jar

我曾尝试，并试图再次建立一个Ant构建在这里我的项目概要：

NoClassDefFoundError的与外部JAR文件的Windows命令行运行Java时

这是构建文件我试图运行：

 <project> <target name="clean"> <delete dir="build" /> </target> <path id="jarpath"> <fileset dir="C:\JAR"> <include name="**" /> </fileset> </path> <target name="compile"> <mkdir dir="build/classes" /> <javac srcdir="." destdir="build/classes" includeantruntime="false"> <classpath id="jarpath" /> <classpath> <pathelement path="jarpath" /> </classpath> </javac> </target> <target name="jar"> <mkdir dir="build/jar" /> <jar destfile="build/jar/TestCase1.jar" basedir="build/classes"> <manifest> <attribute name="Main-Class" value="NSSR.TestCase1" /> </manifest> </jar> <jar destfile="build/jar/UniversalVariables.jar" basedir="build/classes"> <manifest> <attribute name="Main-Class" value="NSSR.UniversalVariables" /> </manifest> </jar> </target> </project> 

当我把“蚁编译”到Windows命令行中，它给了我一个错误的这个庞然大物：

 Buildfile: C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Case s\src\build.xml compile: [javac] Compiling 4 source files to C:\Documents and Settings\jradcliffe\wor kspace\ITSM_Upgrade_Test_Cases\src\build\classes [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:3: package com.thoughtworks.selenium does not exist [javac] import com.thoughtworks.selenium.*; [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:4: package org.junit does not exist [javac] import org.junit.After; [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:5: package org.junit does not exist [javac] import org.junit.Before; [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:6: package org.junit does not exist [javac] import org.junit.Test; [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:10: cannot find symbol [javac] symbol: class SeleneseTestCase [javac] public class TestCase1 extends SeleneseTestCase { [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:3: package com.thoughtworks.selenium does not exist [javac] import com.thoughtworks.selenium.*; [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:4: package org.junit does not exist [javac] import org.junit.After; [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:5: package org.junit does not exist [javac] import org.junit.Before; [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:6: package org.junit does not exist [javac] import org.junit.Test; [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:10: cannot find symbol [javac] symbol: class SeleneseTestCase [javac] public class TestCase1 extends SeleneseTestCase { [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:23: cannot find symbol [javac] symbol : class Before [javac] location: class NSSR.TestCase1 [javac] @Before [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:30: cannot find symbol [javac] symbol : class Test [javac] location: class NSSR.TestCase1 [javac] @Test [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:65: cannot find symbol [javac] symbol : class After [javac] location: class NSSR.TestCase1 [javac] @After [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:23: cannot find symbol [javac] symbol : class Before [javac] location: class TestCase1 [javac] @Before [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:30: cannot find symbol [javac] symbol : class Test [javac] location: class TestCase1 [javac] @Test [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:65: cannot find symbol [javac] symbol : class After [javac] location: class TestCase1 [javac] @After [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:25: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium = new DefaultSelenium("localhost", 4444, "*fire fox", [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:25: cannot find symbol [javac] symbol : class DefaultSelenium [javac] location: class NSSR.TestCase1 [javac] selenium = new DefaultSelenium("localhost", 4444, "*fire fox", [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:27: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.start(); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:32: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.open(UniversalVariables.loginPage); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:33: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.type("name=USERNAME", UniversalVariables.userna me); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:34: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.type("name=PASSWORD", UniversalVariables.passwo rd); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:35: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.click("link=Submit"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:36: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.waitForPageToLoad("60000"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:37: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.open("/itg/dashboard/app/portal/PageView.jsp?IS _WINDOID=N"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:38: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.click("link=Create"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:39: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.click("link=Request"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:40: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.waitForPageToLoad("30000"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:41: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.select("name=REQUEST_TYPE_CREATE", [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:43: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.click("css=span.secBtn > a"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:44: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.waitForPageToLoad("30000"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:55: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.type("id=REQ.DESCRIPTION", title); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:56: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.type("id=REQ.P.REQUESTORAC_TF", req); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:57: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.select("id=REQ.P.REQUESTOR_DEPT", dept); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:58: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.type("id=REQ.P.DETAIL_DESC", desc); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:59: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.type("REQ.P.REQ_COMPL_DATE", date); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:60: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.click("link=Submit"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:61: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.waitForPageToLoad("30000"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:62: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.refresh(); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\NSSR\TestCase1.java:67: cannot find symbol [javac] symbol : variable selenium [javac] location: class NSSR.TestCase1 [javac] selenium.stop(); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:25: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium = new DefaultSelenium("localhost", 4444, "*fire fox", [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:25: cannot find symbol [javac] symbol : class DefaultSelenium [javac] location: class TestCase1 [javac] selenium = new DefaultSelenium("localhost", 4444, "*fire fox", [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:27: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.start(); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:32: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.open(UniversalVariables.loginPage); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:33: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.type("name=USERNAME", UniversalVariables.userna me); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:34: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.type("name=PASSWORD", UniversalVariables.passwo rd); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:35: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.click("link=Submit"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:36: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.waitForPageToLoad("60000"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:37: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.open("/itg/dashboard/app/portal/PageView.jsp?IS _WINDOID=N"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:38: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.click("link=Create"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:39: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.click("link=Request"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:40: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.waitForPageToLoad("30000"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:41: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.select("name=REQUEST_TYPE_CREATE", [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:43: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.click("css=span.secBtn > a"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:44: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.waitForPageToLoad("30000"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:55: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.type("id=REQ.DESCRIPTION", title); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:56: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.type("id=REQ.P.REQUESTORAC_TF", req); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:57: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.select("id=REQ.P.REQUESTOR_DEPT", dept); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:58: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.type("id=REQ.P.DETAIL_DESC", desc); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:59: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.type("REQ.P.REQ_COMPL_DATE", date); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:60: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.click("link=Submit"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:61: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.waitForPageToLoad("30000"); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:62: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.refresh(); [javac] ^ [javac] C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cas es\src\TestCase1.java:67: cannot find symbol [javac] symbol : variable selenium [javac] location: class TestCase1 [javac] selenium.stop(); [javac] ^ [javac] 64 errors BUILD FAILED C:\Documents and Settings\jradcliffe\workspace\ITSM_Upgrade_Test_Cases\src\build .xml:15: Compile failed; see the compiler error output for details. Total time: 1 second 

基本上说，它似乎并没有从我的jar文件，我想使因为我不引用它们在编译目标感承认什么。 问题是，我不知道引用它们（这是我的第一个构建文件除了我的Hello World）。

谢谢

Answer 1:

你遇到的问题是建立和管理类路径。 这是迄今为止与ANT最常见的问题建立...

当我回顾你的代码看起来你应该运行JUnit ...

我放在一起演示了以下修订构建文件：

1. 使用apache的常春藤来管理所有的第三方依赖的JAR
2. 运行使用ant JUnit测试junit任务
3. 包装一个可执行的JAR完整的类路径

希望能帮助到你。

例

该项目已在以下问题提供了源代码构建：

NoClassDefFoundError的与外部JAR文件的Windows命令行运行Java时

|-- build.xml
`-- src
    `-- NSSR
        |-- TestCase1.java
        `-- UniversalVariables.java

你需要运行一次下面的目标安装常春藤插件

ant bootstrap

构建然后运行如下

ant clean jar

如下生成的JAR然后可以执行;

java -jar build/dist/demo.jar

build.xml文件

<project name="demo" default="jar" xmlns:ivy="antlib:org.apache.ivy.ant">

    <!--
    ==========
    Properties
    ==========
    -->
    <property name="src.dir"     location="src"/>
    <property name="build.dir"   location="build"/>
    <property name="classes.dir" location="${build.dir}/classes"/>
    <property name="dist.dir"    location="${build.dir}/dist"/>

    <property name="jar.file"       location="${dist.dir}/${ant.project.name}.jar"/>
    <property name="jar.main.class" value="NSSR.TestCase1"/>

    <property name="javac.deprecation" value="false"/>
    <property name="junit.haltonfailure" value="false"/>

    <!--
    =======
    Targets
    =======
    -->
    <target name="bootstrap" description="Install ivy">
        <mkdir dir="${user.home}/.ant/lib"/>
        <get src="https://repository.sonatype.org/service/local/artifact/maven/redirect?r=central-proxy&amp;g=org.apache.ivy&amp;a=ivy&amp;v=LATEST&amp;e=jar"
             dest="${user.home}/.ant/lib/ivy.jar"/>
    </target>

    <target name="init" description="Resolve dependencies and set classpaths">
        <ivy:cachepath pathid="build.path" conf="default">
            <dependency org="org.seleniumhq.selenium" name="selenium" rev="2.0rc2"/>
            <dependency org="junit" name="junit" rev="4.10"/>
        </ivy:cachepath>
    </target>

    <target name="compile" depends="init" description="Compile the code">
        <mkdir dir="${classes.dir}" />
        <javac srcdir="." destdir="${classes.dir}" includeantruntime="false" deprecation="${javac.deprecation}" classpathref="build.path"/>
    </target>

    <target name="test" depends="compile" description="Run unit tests">
        <mkdir dir="${build.dir}/tests"/>

        <junit printsummary="yes" haltonfailure="${junit.haltonfailure}">
            <classpath>
                <path refid="build.path"/>
                <pathelement path="${classes.dir}"/>
            </classpath>
            <formatter type="plain"/>
            <batchtest fork="yes" todir="${build.dir}/tests">
                <fileset dir="${src.dir}" includes="**/*Test*.java"/>
            </batchtest>
        </junit>
    </target>

    <target name="jar" depends="test" description="Build jar files">
        <ivy:retrieve pattern="${dist.dir}/lib/[artifact]-[revision](-[classifier]).[ext]"/>

        <manifestclasspath property="jar.classpath" jarfile="${jar.file}">
            <classpath>
                <fileset dir="${dist.dir}/lib" includes="*.jar"/>
            </classpath>
        </manifestclasspath>

        <jar destfile="${jar.file}" basedir="${classes.dir}">
            <manifest>
                <attribute name="Main-Class" value="${jar.main.class}" />
                <attribute name="Class-Path" value="${jar.classpath}" />
            </manifest>
        </jar>
    </target>

    <target name="clean" description="Remove build files">
        <delete dir="${build.dir}" />
    </target>

    <target name="clean-all" depends="clean" description="Additionally purge ivy cache">
        <ivy:cleancache/>
    </target>

</project>

Answer 2:

尝试这个：

 <classpath>
      <pathelement path="${classpath}"/>
      <fileset dir="lib">
        <include name="**/*.jar"/>
      </fileset>
      <pathelement location="classes"/>
      <dirset dir="${build.dir}">
        <include name="apps/**/classes"/>
        <exclude name="apps/**/*Test*"/>
      </dirset>
      <filelist refid="third-party_jars"/>
    </classpath>

见编写一个简单的构建文件

Answer 3:

试着改变你compile目标，使得内<javac>的<classpath>使用refid而不是id如下：

<target name="compile">
    <mkdir dir="build/classes" />
    <javac srcdir="." destdir="build/classes" includeantruntime="false">
        <classpath refid="jarpath" />
    </javac>
</target>

文章来源: Buildfile for Java with external jars