无法在我的postInvoiceByRestService方法中模拟Rest Template静态对象我已经尝试了很多方法，包括Power Mockito Mockito spy，但对我不起作用什么策略需要使用模拟静态Rest Template对象？
Java类

public class PeopleSoftInvoiceRestPublisher {
    private static final String UPDATED_BY = "DFIINVP";

    private static final String TAX_ACCOUNT = "241900";
    private static URL serverURL;
    private static RestTemplate restTemplate = new RestTemplate();

    public static void main(String[] args) throws DfiException, SQLException {
        getWLConnection();
        PeopleSoftInvoiceRestPublisher peopleSoftInvoiceRestPublisher = new PeopleSoftInvoiceRestPublisher();
        peopleSoftInvoiceRestPublisher.publishInvoices();
    }

    

    public void postInvoiceByRestService(PeopleSoftRecordBuilder builder) {
        HttpHeaders header = new HttpHeaders();

        header.add("Authorization", "Basic " + Base64.getEncoder().encodeToString(
                (DfiResources.getResource("PS_USER") + ":" + DfiResources.getResource("PS_PASSWORD")).getBytes()));
        PostInvoiceRequestDTO postInvoiceRequestDTO = getPostInvoiceRequestDTO(builder);
        HttpEntity<PostInvoiceRequestDTO> httpEntity = new HttpEntity<PostInvoiceRequestDTO>(postInvoiceRequestDTO,
                header);
        try {
            ObjectWriter ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
            DfiLog.info("Request JSON Payload ::  " + ow.writeValueAsString(postInvoiceRequestDTO));
        } catch (JsonProcessingException e) {
            // TODO Auto-generated catch block
        }

        DfiLog.info("Request Payload ::  " + postInvoiceRequestDTO.toString());

        String urlTemplate = UriComponentsBuilder.fromHttpUrl(DfiResources.getResource("PS_POST_URL")).toUriString();
        // .queryParam("From_date", getYesterdayDate()).queryParam("To_date",
        // modifiedDate).toUriString();
        DfiLog.info("Request Rest endpoint :: " + urlTemplate);
        
         ResponseEntity<String> invoiceResponseEntity =  restTemplate.exchange(urlTemplate, HttpMethod.POST, httpEntity,String.class); 
         DfiLog.info("Response Entity :: " + invoiceResponseEntity.toString());
         
    }
}

@RunWith(PowerMockRunner.class)
@PrepareForTest({ DfiResources.class, DfiLog.class, UriComponentsBuilder.class })
//@PrepareEverythingForTest
@PowerMockIgnore("javax.swing.*")
public class PeopleSoftInvoiceRestPublisherTest {

    

    @InjectMocks
    private PeopleSoftInvoiceRestPublisher peopleSoftInvoiceRestPublisher;
      
    /*@Mock 
    RestTemplate restTemplate;
    */ 
       
     
    @Before
    public void setup() {
        
        MockitoAnnotations.initMocks(this);
        
    }

    
    @Test
    public void testCase() throws Exception {

        PeopleSoftRecordBuilder peopleSoftRecordBuilder = new PeopleSoftRecordBuilder();
        
        PowerMockito.mockStatic(DfiResources.class);
        when(DfiResources.getResource("PS_USER")).thenReturn("USER");
        when(DfiResources.getResource("PS_PASSWORD")).thenReturn("PASSWORD");
        when(DfiResources.getResource(Mockito.anyString())).thenReturn("PASSWORD");
        when(DfiResources.getResource("PS_POST_URL")).thenReturn("https://example.com/hotels/42?filter={value}");
        
        PowerMockito.mock(DfiLog.class);

        peopleSoftRecordBuilder.invoiceAmt(new BigDecimal(10.0));
        peopleSoftRecordBuilder.invoiceNum("1234");
        peopleSoftRecordBuilder.supplierNumber("567");
        peopleSoftRecordBuilder.setQtyDelivered(new BigDecimal(210.0));
        
        PowerMockito.mock(UriComponentsBuilder.class);
        //PowerMockito.mockStatic(RestTemplate.class);
        //RestTemplate t1=new RestTemplate();
        ResponseEntity<String> str=new ResponseEntity<String>("dsffdsd",HttpStatus.ACCEPTED);
        RestTemplate restTemplate= Mockito.mock(RestTemplate.class);
        when(restTemplate.exchange(Matchers.any(String.class),Matchers.any(HttpMethod.class),Matchers.<HttpEntity<?>> any() ,Matchers.<Class<?>>any())
        ).thenReturn(null);
        //doNothing().when(restTemplate).exchange(Matchers.any(String.class),Matchers.any(HttpMethod.class),Matchers.<HttpEntity<?>> any() ,Matchers.<Class<?>>any());
        
      peopleSoftInvoiceRestPublisher.postInvoiceByRestService(peopleSoftRecordBuilder);

        

    }
}

无法在我的postInvoiceByRestService方法中模拟RestTemplate静态对象？
我尝试了多种方法使用PowerMockito & Mockito，间谍，但没有得到输出。请让我知道我做错了什么。