使用Spring MockMVC测试Spring的@RequestBody

问题内容：

我正在尝试测试使用Spring的MockMVC框架将对象发布到数据库的方法。我将测试构建如下：

@Test
public void testInsertObject() throws Exception {

    String url = BASE_URL + "/object";

    ObjectBean anObject = new ObjectBean();
    anObject.setObjectId("33");
    anObject.setUserId("4268321");
    //... more

    Gson gson = new Gson();
    String json = gson.toJson(anObject);

    MvcResult result = this.mockMvc.perform(
            post(url)
            .contentType(MediaType.APPLICATION_JSON)
            .content(json))
            .andExpect(status().isOk())
            .andReturn();
}

我正在测试的方法使用Spring的@RequestBody接收ObjectBean，但是测试始终返回400错误。

@ResponseBody
@RequestMapping(    consumes="application/json",
                    produces="application/json",
                    method=RequestMethod.POST,
                    value="/object")
public ObjectResponse insertObject(@RequestBody ObjectBean bean){

    this.photonetService.insertObject(bean);

    ObjectResponse response = new ObjectResponse();
    response.setObject(bean);

    return response;
}

gson在测试中创建的json：

{
   "objectId":"33",
   "userId":"4268321",
   //... many more
}

ObjectBean类

public class ObjectBean {

private String objectId;
private String userId;
//... many more

public String getObjectId() {
    return objectId;
}

public void setObjectId(String objectId) {
    this.objectId = objectId;
}

public String getUserId() {
    return userId;
}

public void setUserId(String userId) {
    this.userId = userId;
}
//... many more
}

所以我的问题是：如何使用Spring MockMVC测试此方法？

问题答案：

用这个

public static final MediaType APPLICATION_JSON_UTF8 = new MediaType(MediaType.APPLICATION_JSON.getType(), MediaType.APPLICATION_JSON.getSubtype(), Charset.forName("utf8"));

@Test
public void testInsertObject() throws Exception { 
    String url = BASE_URL + "/object";
    ObjectBean anObject = new ObjectBean();
    anObject.setObjectId("33");
    anObject.setUserId("4268321");
    //... more
    ObjectMapper mapper = new ObjectMapper();
    mapper.configure(SerializationFeature.WRAP_ROOT_VALUE, false);
    ObjectWriter ow = mapper.writer().withDefaultPrettyPrinter();
    String requestJson=ow.writeValueAsString(anObject );

    mockMvc.perform(post(url).contentType(APPLICATION_JSON_UTF8)
        .content(requestJson))
        .andExpect(status().isOk());
}

如评论中所述，这是有效的，因为对象被转换为json并作为请求主体传递。此外，contentType被定义为Json（APPLICATION_JSON_UTF8）。

有关HTTP请求主体结构的更多信息

使用Spring MockMVC测试Spring的@RequestBody

微信关注