我無法模擬我的 getUserCards 返回空列表。它總是從數據庫中獲取信息。你有什么想法？我附上我的 get 請求和 mockito 實現。我想設置 getUserCards 方法總是返回一個空列表，但我不能被嘲笑@Beforepublic void setUp() throws Exception{    //cards.add(new Card());    CardService mock = Mockito.mock(CardService.class);    Mockito.when(mock.getUserCards("1234"))            .thenReturn(cards);}@Testpublic void testMockCards() throws Exception{    mockMvc = MockMvcBuilders.standaloneSetup(cardController).build();    MockHttpServletResponse response = mockMvc.perform(            MockMvcRequestBuilders.get("/cards")    )            .andDo(MockMvcResultHandlers.print())            .andExpect(MockMvcResultMatchers.status().isOk())            .andReturn().getResponse();    ObjectMapper mapper = new ObjectMapper();    List<Card> cardResponse = mapper.readValue(response.getContentAsString(),        new TypeReference<List<Card>>(){});    Assert.assertEquals(cards, cardResponse);}得到@RequestMapping(value = "/cards", method = RequestMethod.GET)@JsonView(Views.Public.class)public List<Card> getUserCards({  session.getEntityUserId());}