我一模一样的步骤，运行的时候出错了

Exception in thread "main" java.lang.NoClassDefFoundError: com/gexin/rp/sdk/http/IGtPush

at test.PushTest.main(PushTest.java:24)

Caused by: java.lang.ClassNotFoundException: com.gexin.rp.sdk.http.IGtPush

at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

... 1 more