如何使用powermock来存根Instant对象

<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-core</artifactId>
    <version>2.0.9</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-module-junit4</artifactId>
    <version>2.0.9</version>
    <scope>test</scope>
</dependency>

@RunWith(PowerMockRunner.class)
@PrepareForTest({YourClass.class}) // 需要存根的类
public class YourTestClass {
    // 测试方法
}

@Test
public void testYourMethod() {
    PowerMockito.mockStatic(YourClass.class);
    // 存根静态方法的行为
    YourClass yourClassMock = Mockito.mock(YourClass.class);
    Mockito.when(yourClassMock.yourStaticMethod()).thenReturn(yourExpectedResult);
    PowerMockito.when(YourClass.class, "yourStaticMethod").thenReturn(yourExpectedResult);
    
    // 调用被测试方法
    YourClass.yourStaticMethod();
    
    // 断言结果
    // ...
}

@Test
public void testYourMethod() throws Exception {
    YourClass yourClassMock = Mockito.mock(YourClass.class);
    PowerMockito.whenNew(YourClass.class).withNoArguments().thenReturn(yourClassMock);
    
    // 调用被测试方法
    YourClass instance = new YourClass();
    
    // 断言结果
    // ...
}