我在springboot中尝试了MockMultipartFile类的AcceptanceTest，并且发生了HttpMessageConversionException。
并且我看到许多代码可用于File Object，但是正如您所见，我的dto包含MultipartFile。
您知道我为什么不起作用吗？以及如何解决？
这是杰克逊转换错误，所以我检查了所有的get〜方法和
我尝试制作CustomMultipartFile并覆盖getInputStream方法并附加@JsonIgnore
但这会导致另一个错误，并且不起作用
org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class java.io.ByteArrayInputStream]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class java.io.ByteArrayInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: org.springframework.mock.web.MockMultipartFile["inputStream"])
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:293)
at org.springframework.http.converter.AbstractGenericHttpMessageConverter.writeInternal(AbstractGenericHttpMessageConverter.java:112)
at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:227)
at org.springframework.http.converter.FormHttpMessageConverter.writePart(FormHttpMessageConverter.java:417)
at org.springframework.http.converter.FormHttpMessageConverter.writeParts(FormHttpMessageConverter.java:393)
at org.springframework.http.converter.FormHttpMessageConverter.writeMultipart(FormHttpMessageConverter.java:373)
at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:277)
at org.springframework.http.converter.FormHttpMessageConverter.write(FormHttpMessageConverter.java:95)
at org.springframework.web.client.RestTemplate$HttpEntityRequestCallback.doWithRequest(RestTemplate.java:948)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:733)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:670)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:579)
at org.springframework.boot.test.web.client.TestRestTemplate.exchange(TestRestTemplate.java:774)
at com.mappractice.demo.acceptanceTest.AcceptanceTest.sendFile(AcceptanceTest.java:51)
at com.mappractice.demo.acceptanceTest.ImageAcceptanceTest.이미지_생성_API_성공(ImageAcceptanceTest.java:46)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class java.io.ByteArrayInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: org.springframework.mock.web.MockMultipartFile["inputStream"])
at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:77)
at com.fasterxml.jackson.databind.SerializerProvider.reportBadDefinition(SerializerProvider.java:1191)
at com.fasterxml.jackson.databind.DatabindContext.reportBadDefinition(DatabindContext.java:313)
at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.failForEmpty(UnknownSerializer.java:71)
at com.fasterxml.jackson.databind.ser.impl.UnknownSerializer.serialize(UnknownSerializer.java:33)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:727)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:719)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1396)
at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:913)
at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:287)
... 45 more
测试代码
public class ImageAcceptanceTest extends AcceptanceTest {
private static final String API_IMAGE_URI = "/api/image";
private static MockMultipartFile content;
private static Image image;
private static PositionedImageDTO positionedImageDTO;
@BeforeClass
public static void init() {
content = new MockMultipartFile("file",
"ded.png",
"image/png",
"datdedadsdwdssdwa".getBytes()
);
image = new Image(1L, "테스트 이미지", "12kl312nlk3".getBytes(), new Location("12.1234567", "12.1234566"));
positionedImageDTO = new PositionedImageDTO("테스트 이미지", content, "12.1234567", "12.1234566");
}
@Test
public void image_create_API_success() {
MultiValueMap<String, Object> parameters = new LinkedMultiValueMap<String, Object>();
parameters.add("fileName", "테스트 이미지");
parameters.add("file", content);
parameters.add("xIndex", "123");
parameters.add("yIndex", "454");
ResponseEntity<Image> responseEntity = sendFile(API_IMAGE_URI, parameters, Image.class);
assertThat(responseEntity.getBody().getName()).isEqualTo("테스트 이미지");
}
...
控制器代码
@RestController
@RequestMapping("/api/image")
public class ApiImageController {
...
@PostMapping("")
public ResponseEntity<Image> create(@ModelAttribute PositionedImageDTO positionedImageDTO){
Image image = imageService.create(positionedImageDTO);
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.setLocation(URI.create("/api/image/"+image.getId()));
return new ResponseEntity<>(image, headers, HttpStatus.CREATED);
}
...
}
DTO代码
@Getter
@Setter
@NoArgsConstructor
@ToString
public class PositionedImageDTO {
@NotEmpty
private String fileName;
@NotEmpty
private MultipartFile file;
@NotNull
private String xIndex;
@NotNull
private String yIndex;
public PositionedImageDTO(String fileName, MultipartFile file, String xIndex, String yIndex) {
this.fileName = fileName;
this.file = file;
this.xIndex = xIndex;
this.yIndex = yIndex;
}
public String getExtentionFormat() {
return "." + file.getContentType().split("/")[1];
}
}