江湖救急: Ant执行javac出错

Vincent.cc 2011-07-10 11:07:57

最近在学习ant的使用，碰到在使用ant编译java代码出错的问题，不知各位大侠有没有遇到过？

build.xml文件内容:



<?xml version="1.0" encoding="UTF-8"?>

<project name="HelloWorld" default="run" basedir=".">



<property name="src" value="src"/>

<property name="dest" value="build\classes"/>

<property name="hello_jar" value="hello1.jar"/>



<!--  init -->

<target name="init">

<mkdir dir="${dest}"/>

</target>



<!-- compile -->

<target name="compile" depends="init">

<javac includeantruntime="on" srcdir="${src}" destdir="${dest}" executable="C:\Program Files\Java\jdk1.6.0\bin\javac"/>

</target>



<!-- build jar file-->

<target name="build" depends="compile">

<jar jarfile="${hello_jar}" basedir="${dest}"/>

</target>



<!-- run -->

<target name="run" depends="build">

<java classname="test.ant.HelloWorld" classpatn="${hello_jar}"/>

</target>



<!-- clean -->

<target name="clean">

<delete dir="${dest}"/>

<delete file="${hello_jar}"/>

</target>



<!-- rerun -->

<target name="rerun" depends="clean,run">

<ant target="clean"/>

<ant terget="run"/>

</target>

</project>

HelloWorld.java内容很简单，如下:



package test.ant;



public class HelloWorld 

{

	public static void main(String[] args) {

		System.out.println("Test Ant.");

	}

}

在执行build.xml文件的过程中，出现的异常如下:
Buildfile: D:\workspaceOther\Test_Ant\build.xml
init:
compile:
[javac] Compiling 1 source file to D:\workspaceOther\Test_Ant\build\classes
[javac] 编译器 (1.6.0-beta2) 中出现异常。如果在 Bug Parade 中没有找到该错误，请在 Java Developer Connection (http://java.sun.com/webapps/bugreport) 对该错误进行归档。请在报告中附上您的程序和以下诊断信息。谢谢您的合作。
[javac] java.lang.NoClassDefFoundError: javax/lang/model/type/VoidType
[javac] at java.lang.ClassLoader.defineClass1(Native Method)
[javac] at java.lang.ClassLoader.defineClassCond(Unknown Source)
[javac] at java.lang.ClassLoader.defineClass(Unknown Source)
[javac] at java.security.SecureClassLoader.defineClass(Unknown Source)
[javac] at java.net.URLClassLoader.defineClass(Unknown Source)
[javac] at java.net.URLClassLoader.access$000(Unknown Source)
[javac] at java.net.URLClassLoader$1.run(Unknown Source)
[javac] at java.security.AccessController.doPrivileged(Native Method)
[javac] at java.net.URLClassLoader.findClass(Unknown Source)
[javac] at java.lang.ClassLoader.loadClass(Unknown Source)
[javac] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
[javac] at java.lang.ClassLoader.loadClass(Unknown Source)
[javac] at com.sun.tools.javac.jvm.ClassReader.<init>(ClassReader.java:198)
[javac] at com.sun.tools.javac.jvm.ClassReader.instance(ClassReader.java:160)
[javac] at com.sun.tools.javac.main.JavaCompiler.<init>(JavaCompiler.java:263)
[javac] at com.sun.tools.javac.main.JavaCompiler.instance(JavaCompiler.java:72)
[javac] at com.sun.tools.javac.main.Main.compile(Main.java:314)
[javac] at com.sun.tools.javac.main.Main.compile(Main.java:253)
[javac] at com.sun.tools.javac.main.Main.compile(Main.java:244)
[javac] at com.sun.tools.javac.Main.compile(Main.java:69)
[javac] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[javac] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[javac] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[javac] at java.lang.reflect.Method.invoke(Unknown Source)
[javac] at org.apache.tools.ant.taskdefs.compilers.Javac13.execute(Javac13.java:56)
[javac] at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1134)
[javac] at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:912)
[javac] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
[javac] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[javac] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[javac] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[javac] at java.lang.reflect.Method.invoke(Unknown Source)
[javac] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
[javac] at org.apache.tools.ant.Task.perform(Task.java:348)
[javac] at org.apache.tools.ant.Target.execute(Target.java:390)
[javac] at org.apache.tools.ant.Target.performTasks(Target.java:411)
[javac] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
[javac] at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
[javac] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
[javac] at org.eclipse.ant.internal.launching.remote.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
[javac] at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
[javac] at org.eclipse.ant.internal.launching.remote.InternalAntRunner.run(InternalAntRunner.java:423)
[javac] at org.eclipse.ant.internal.launching.remote.InternalAntRunner.main(InternalAntRunner.java:137)
[javac] Caused by: java.lang.ClassNotFoundException: javax.lang.model.type.VoidType
[javac] at java.net.URLClassLoader$1.run(Unknown Source)
[javac] at java.security.AccessController.doPrivileged(Native Method)
[javac] at java.net.URLClassLoader.findClass(Unknown Source)
[javac] at java.lang.ClassLoader.loadClass(Unknown Source)
[javac] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
[javac] at java.lang.ClassLoader.loadClass(Unknown Source)
[javac] ... 43 more

BUILD FAILED
D:\workspaceOther\Test_Ant\build.xml:15: Compile failed; see the compiler error output for details.

Total time: 500 milliseconds

这是怎么回事呢，JDK版本问题，还是JDK和ANT版本的兼容问题，各位大虾支支招，谢谢。。。

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