我正在使用@ PreapareForTest（Drivermanager.class）运行PowermockRunner，但看来我遇到了错误。
org.powermock.api.mockito.ClassNotPreparedException：
[Ljava.lang.Object; @ 55f8669d 类java.sql.DriverManager未准备好进行测试。
at org.powermock.api.mockito.expectation.reporter.MockitoPowerMockReporter.classNotPrepared(MockitoPowerMockReporter.java:29)
at org.powermock.api.mockito.internal.mockcreation.MockTypeValidatorFactory$DefaultMockTypeValidator.validate(MockTypeValidatorFactory.java:37)
at org.powermock.api.mockito.internal.mockcreation.AbstractMockCreator.validateType(AbstractMockCreator.java:10)
at org.powermock.api.mockito.internal.mockcreation.DefaultMockCreator.createMock(DefaultMockCreator.java:49)
at org.powermock.api.mockito.internal.mockcreation.DefaultMockCreator.mock(DefaultMockCreator.java:40)
at org.powermock.api.mockito.PowerMockito.mockStatic(PowerMockito.java:62)
at com.xxx.budget.Util.DBTest.setup(DBTest.java:52)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
at