Mockito - mocked静态方法总是返回null

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

@RunWith(PowerMockRunner.class)
@PrepareForTest(YourClassWithStaticMethod.class)
public class YourTestClass {
    
    @Test
    public void testYourMethod() {
        // 模拟静态方法的返回值
        PowerMockito.mockStatic(YourClassWithStaticMethod.class);
        when(YourClassWithStaticMethod.yourStaticMethod()).thenReturn("mocked value");
        
        // 调用被测试的方法
        YourClass yourClass = new YourClass();
        String result = yourClass.yourMethod();
        
        // 断言结果
        assertEquals("mocked value", result);
    }
}