Ant：线程“main”中的exceptionjava.lang.NoClassDefFoundError：org / apache / tools / ant / launch / Launcher

我已经在我的系统中安装了Ubuntu 10.10，并使用以下命令安装了ant：sudo apt-get install ant

现在，ant在共享文件夹中可见，所以我试图在terminal中运行ant命令，但它给了我这个错误：

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/tools/ant/launch/Launcher Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.launch.Launcher at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) Could not find the main class: org.apache.tools.ant.launch.Launcher. Program will exit. 

然后我再次设置这些：

 JAVA_HOME="/usr/lib/jvm/java-6-sun-1.6.0.22/" ANT_HOME="/usr/share/ant/" PATH="/usr/share/ant/bin/" 

现在它给了我同样的错误，但在开始时有一个不同的路线：

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 /usr/share/ant/bin/ant: 92: uname: not found Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/tools/ant/launch/Launcher Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.launch.Launcher at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) Could not find the main class: org.apache.tools.ant.launch.Launcher. Program will exit. 

 JAVA_HOME="/usr/lib/jvm/java-6-sun" ANT_HOME="/usr/share/ant" # do not add "bin" at the end of the path** PATH="$ANT_HOME/bin:$PATH"