我有Ant的下面构建文件，并尝试使用目标'run'来执行程序。
<property name="springjar" location="E:/Tools/spring-30/dist/" />
<property name="logjar" location="E:/Tools/commons-logging-1.1.1/" />
<patternset id="jar.files"><include name="**/*.jar"/></patternset>
<path id="springlearn.classpath">
<fileset dir="${springjar}"><patternset refid="jar.files"/></fileset>
<fileset dir="${logjar}"><patternset refid="jar.files"/></fileset>
</path>
<target name="run" depends="dist" description="Execute the Java Program">
<java dir ="." fork="true" jar="dist\app.jar" classpathref ="springlearn.classpath">
</java>
</target>
使用相同的classpathref，我能够成功编译＆amp;创建jar，但是当使用目标运行时，我得到以下错误
java.lang.NoClassDefFoundError: org/springframework/core/io/Resource
Caused by: java.lang.ClassNotFoundException: org.springframework.core.io.Resource
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:289)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
线程“main”中的异常
非常感谢任何帮助。感谢
答案 0 :(得分：9)
使用jar属性时，根据Sun's specification忽略所有类路径设置。
因此，您设置的类路径根本没有被查看。
您可以将dist/app.jar添加到类路径并直接调用主类：
<java dir ="." fork="true" classname="com.yourdomain.YourMainClass">
<classpath>
<path refid="springlearn.classpath" />
<pathelement location="dist\app.jar" />
</classpath>
</java>
如果要调用jar，则需要在构建时在清单中设置类路径条目。看看pathconvert任务，它可能很有用。
答案 1 :(得分：7)
这是一个适用于我的通用Ant build.xml。看看它是否也可以帮到你：
<?xml version="1.0" encoding="UTF-8"?>
<project name="ui" basedir="." default="package">
<property name="version" value="1.6"/>
<property name="haltonfailure" value="no"/>
<property name="out" value="out"/>
<property name="production.src" value="src"/>
<property name="production.lib" value="lib"/>
<property name="production.resources" value="config"/>
<property name="production.classes" value="${out}/production/${ant.project.name}"/>
<property name="test.src" value="test"/>
<property name="test.lib" value="lib"/>
<property name="test.resources" value="config"/>
<property name="test.classes" value="${out}/test/${ant.project.name}"/>
<property name="exploded" value="out/exploded/${ant.project.name}"/>
<property name="exploded.classes" value="${exploded}/WEB-INF/classes"/>
<property name="exploded.lib" value="${exploded}/WEB-INF/lib"/>
<property name="reports.out" value="${out}/reports"/>
<property name="junit.out" value="${reports.out}/junit"/>
<property name="testng.out" value="${reports.out}/testng"/>
<path id="production.class.path">
<pathelement location="${production.classes}"/>
<pathelement location="${production.resources}"/>
<fileset dir="${production.lib}">
<include name="**/*.jar"/>
<exclude name="**/junit*.jar"/>
<exclude name="**/*test*.jar"/>
</fileset>
</path>
<path id="test.class.path">
<path refid="production.class.path"/>
<pathelement location="${test.classes}"/>
<pathelement location="${test.resources}"/>
<fileset dir="${test.lib}">
<include name="**/junit*.jar"/>
<include name="**/*test*.jar"/>
</fileset>
</path>
<path id="testng.class.path">
<fileset dir="${test.lib}">
<include name="**/testng*.jar"/>
</fileset>
</path>
<available file="${out}" property="outputExists"/>
<target name="clean" description="remove all generated artifacts" if="outputExists">
<delete dir="${out}" includeEmptyDirs="true"/>
<delete dir="${reports.out}" includeEmptyDirs="true"/>
</target>
<target name="create" description="create the output directories" unless="outputExists">
<mkdir dir="${production.classes}"/>
<mkdir dir="${test.classes}"/>
<mkdir dir="${junit.out}"/>
<mkdir dir="${testng.out}"/>
<mkdir dir="${exploded.classes}"/>
<mkdir dir="${exploded.lib}"/>
<mkdir dir="${reports.out}"/>
</target>
<target name="compile" description="compile all .java source files" depends="create">
<!-- Debug output
<property name="production.class.path" refid="production.class.path"/>
<echo message="${production.class.path}"/>
-->
<javac srcdir="src" destdir="${out}/production/${ant.project.name}" debug="on" source="${version}">
<classpath refid="production.class.path"/>
<include name="**/*.java"/>
<exclude name="**/*Test.java"/>
</javac>
<javac srcdir="${test.src}" destdir="${out}/test/${ant.project.name}" debug="on" source="${version}">
<classpath refid="test.class.path"/>
<include name="**/*Test.java"/>
</javac>
</target>
<target name="junit-test" description="run all junit tests" depends="compile">
<!-- Debug output
<property name="test.class.path" refid="test.class.path"/>
<echo message="${test.class.path}"/>
-->
<junit printsummary="yes" haltonfailure="${haltonfailure}">
<classpath refid="test.class.path"/>
<formatter type="xml"/>
<batchtest fork="yes" todir="${junit.out}">
<fileset dir="${test.src}">
<include name="**/*Test.java"/>
</fileset>
</batchtest>
</junit>
<junitreport todir="${junit.out}">
<fileset dir="${junit.out}">
<include name="TEST-*.xml"/>
</fileset>
<report todir="${junit.out}" format="frames"/>
</junitreport>
</target>
<taskdef resource="testngtasks" classpathref="testng.class.path"/>
<target name="testng-test" description="run all testng tests" depends="compile">
<!-- Debug output
<property name="test.class.path" refid="test.class.path"/>
<echo message="${test.class.path}"/>
-->
<testng classpathref="test.class.path" outputDir="${testng.out}" haltOnFailure="${haltonfailure}" verbose="2">
<classfileset dir="${out}/test/${ant.project.name}" includes="**/*.class"/>
</testng>
</target>
<target name="exploded" description="create exploded deployment" depends="testng-test">
<copy todir="${exploded.classes}">
<fileset dir="${production.classes}"/>
</copy>
<copy todir="${exploded.lib}">
<fileset dir="${production.lib}"/>
</copy>
</target>
<target name="package" description="create package file" depends="exploded">
<jar destfile="${out}/${ant.project.name}.jar" basedir="${production.classes}" includes="**/*.class"/>
</target>
</project>