根据@Jon的建议，我将junit目标更改为针对build / classes文件夹而不是jar运行，并适当地更新了依赖项。
我更新的build.xml文件如下：
<project name="HelloWorld" basedir="." default="main"> <property name="src.dir" value="src"/> <property name="build.dir" value="build"/> <property name="classes.dir" value="${build.dir}/classes"/> <property name="jar.dir" value="${build.dir}/jar"/> <property name="lib.dir" value="lib"/> <property name="report.dir" value="${build.dir}/junitreport"/> <property name="main-class" value="oata.HelloWorld"/> <path id="classpath"> <fileset dir="${lib.dir}" includes="***.java"/> </copy> </target> <target name="jar" depends="junit"> <mkdir dir="${jar.dir}"/> <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}" excludes="**/*Test.class"> <manifest> <attribute name="Main-Class" value="${main-class}"/> </manifest> </jar> </target> <target name="junit" depends="compile"> <mkdir dir="${report.dir}"/> <junit printsummary="yes" haltonfailure="yes" showoutput="yes"> <classpath> <path refid="classpath"/> <path location="${classes.dir}"/> </classpath> <formatter type="xml"/> <batchtest fork="yes"> <fileset dir="${src.dir}" includes="*Test.java"/> </batchtest> </junit> </target> <target name="junitreport" depends="junit"> <junitreport todir="${report.dir}"> <fileset dir="${report.dir}" includes="TEST-*.xml"/> <report todir="${report.dir}"/> </junitreport> </target> <target name="run" depends="jar"> <java fork="true" classname="${main-class}"> <classpath> <path refid="classpath"/> <path refid="application"/> </classpath> </java> </target> <target name="clean-build" depends="clean,jar"/> <target name="main" depends="clean,run"/></project>
