执行ant -version报错：
java.lang.NoClassDefFoundError: org/apache/tools/ant/launch/AntMain
%ANT_HOME%
D:\apache-ant-1.8.4
%CLASSPATH%
D:\apache-ant-1.8.4\lib
%PATH%
C:\Program Files\Java\jdk1.8.0\Bin;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Microsoft\Web Platform Installer\;C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\;C:\Program Files (x86)\Windows Kits\8.0\Windows Performance Toolkit\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;D:\Program Files\TortoiseSVN\bin;C:\Program Files\maven\bin;C:\Program Files\Java\jdk1.8.0\Bin;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Microsoft\Web Platform Installer\;C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\;C:\Program Files (x86)\Windows Kits\8.0\Windows Performance Toolkit\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;D:\Program Files\TortoiseSVN\bin;C:\Program Files\maven\bin;D:\apache-ant-1.8.4\bin