Ant学习-002-ant 执行 TestNG 测试用例时 [testng] java.lang.NoClassDefFoundError: com/beust/jcommander/ParameterException 解决方案

Buildfile: D:\DevTool\autoUI_64\workspace\ReportNG\build.xml
init:
compile:
start_server_and_run_tests:
init:
compile:
run_tests:
   [delete] Deleting directory D:\DevTool\autoUI_64\workspace\ReportNG\test-output
    [mkdir] Created dir: D:\DevTool\autoUI_64\workspace\ReportNG\test-output
   [testng] java.lang.NoClassDefFoundError: com/beust/jcommander/ParameterException
   [testng]     at java.lang.Class.getDeclaredMethods0(Native Method)
   [testng]     at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
   [testng]     at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
   [testng]     at java.lang.Class.getMethod0(Class.java:3018)
   [testng]     at java.lang.Class.getMethod(Class.java:1784)
   [testng]     at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
   [testng]     at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
   [testng] Caused by: java.lang.ClassNotFoundException: com.beust.jcommander.ParameterException
   [testng]     at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
   [testng]     at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
   [testng]     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
   [testng]     at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
   [testng]     ... 7 more
   [testng] Error: A JNI error has occurred, please check your installation and try again

BUILD FAILED
D:\DevTool\autoUI_64\workspace\ReportNG\build.xml:24: The following error occurred while executing this line:
D:\DevTool\autoUI_64\workspace\ReportNG\build.xml:31: The tests failed.

Total time: 832 milliseconds