解决Agent JAR loaded but agent failed to initialize

报该错误的（搞了很久）：

Exception in thread "main" com.sun.tools.attach.AgentInitializationException: Agent JAR loaded but agent failed to initialize
at sun.tools.attach.HotSpotVirtualMachine.loadAgent(HotSpotVirtualMachine.java:121)
at com.sun.tools.attach.VirtualMachine.loadAgent(VirtualMachine.java:540)
at Test.main(Test.java:13)

 

检查下自己的jar包有没有class文件，我用IDEA打包jar包时没有把类打包进去，只把MANIFEST.MF打包进去了