【发布时间】：2016-01-14 07:08:05
【问题描述】：
我正在学习 Java ant。我在 Eclipse 中创建了一个项目，调用 hello world。然后我对项目进行了导出并创建了一个 ant 构建文件。当我运行 ant 文件失败时抱怨：BUILD FAILED C:\Users**\workspace\HelloWorld\build.xml:31：找不到类：javac1.8
并指向这一行：
<javac debug="true" debuglevel="${debuglevel}" destdir="bin" includeantruntime="false" source="${source}" target="${target}">
我正在使用 Eclipse 开普勒。
这是我的 build.xml 文件：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!-- WARNING: Eclipse auto-generated file.
Any modifications will be overwritten.
To include a user specific buildfile here, simply create one in the same
directory with the processing instruction <?eclipse.ant.import?>
as the first entry and export the buildfile again. -->
<project basedir="." default="build" name="HelloWorld">
<property environment="env"/>
<property name="debuglevel" value="source,lines,vars"/>
<property name="target" value="1.2"/>
<property name="source" value="1.3"/>
<path id="HelloWorld.classpath">
<pathelement location="bin"/>
</path>
<target name="init">
<mkdir dir="bin"/>
<copy includeemptydirs="false" todir="bin">
<fileset dir="src">
<exclude name="**/*.java"/>
</fileset>
</copy>
</target>
<target name="clean">
<delete dir="bin"/>
</target>
<target depends="clean" name="cleanall"/>
<target depends="build-subprojects,build-project" name="build"/>
<target name="build-subprojects"/>
<target depends="init" name="build-project">
<echo message="${ant.project.name}: ${ant.file}"/>
<javac debug="true" debuglevel="${debuglevel}" destdir="bin" includeantruntime="false" source="${source}" target="${target}">
<src path="src"/>
<classpath refid="HelloWorld.classpath"/>
</javac>
</target>
<target description="Build all projects which reference this project. Useful to propagate changes." name="build-refprojects"/>
<target name="HelloWorld">
<java classname="HelloWorld" failonerror="true" fork="yes">
<classpath refid="HelloWorld.classpath"/>
</java>
</target>
</project>
有人知道为什么会这样吗？
【问题讨论】：
标签： java eclipse ant build.xml