如何使用PowerMock调用私有方法并获取返回值？

import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
@PrepareForTest(ClassWithPrivateMethod.class)
public class PrivateMethodTest {

    @Test
    public void testPrivateMethod() throws Exception {
        // 创建被测试类的实例
        ClassWithPrivateMethod instance = PowerMockito.mock(ClassWithPrivateMethod.class);

        // 模拟私有方法的返回值
        PowerMockito.when(instance, "privateMethod").thenReturn("mockedValue");

        // 调用私有方法并获取返回值
        String result = PowerMockito.invokeMethod(instance, "privateMethod");

        // 断言返回值是否符合预期
        Assert.assertEquals("mockedValue", result);
    }
}