在尝试与RESTTEMPLATE一起使用时，无法读取HTTP消息

Question

我正在学习春季启动。并在下面使用RestTemplate更新REST服务

RestTemplate restTemplate = new RestTemplate();
//        restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
//        restTemplate.getMessageConverters().add(new StringHttpMessageConverter());

        HttpHeaders httpHeaders = restTemplate.headForHeaders("http://localhost:8080/getallblade");
        List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
        messageConverters.add(new FormHttpMessageConverter());
        messageConverters.add(new StringHttpMessageConverter());
        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
        converter.setSupportedMediaTypes(Arrays.asList(MediaType.ALL));
        messageConverters.add(new MappingJackson2XmlHttpMessageConverter());
        messageConverters.add(converter);  
        restTemplate.setMessageConverters(messageConverters);
        BladeView blade  = new BladeView();
        blade.setBladeId(id);
        blade.setAppStatus(false);
        blade.setOperStatus(false);
        blade.setPowerStatus(powerstatus);

        HttpEntity<BladeView> requestUpdate = new HttpEntity<>(blade, httpHeaders);
        restTemplate.exchange("http://localhost:8080"+"/addd", HttpMethod.PUT, requestUpdate, Void.class);

我尝试了上述代码的许多版本，而不是交换，但遇到与以下相同的错误：

Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@696b5835; line: 1, column: 1]
org.springframework.web.client.HttpClientErrorException: 400 null
...................
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:539)
    at com.rhevm.server.COTSSERVER.updatePowerStatus(COTSSERVER.java:102)

这些是我的控制器，服务和模型

@RequestMapping(value="/addd",method=RequestMethod.PUT,consumes = "application/json", produces = "application/json")
    public void add(@RequestBody List<BladeView> bladeView) {
         System.out.println(bladeView);
         bladeViewService.add(bladeView);
    }


public void add(List<BladeView> bladeView) {
         baldeViewRepository.save(bladeView);
     }

@Entity
@Table(name="bladeview")
public class BladeView {
    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    private Integer bladeId;

您可以指导，因为我无法从几天开始解决这个问题。

Answer 1

您可以像这样投掷

  HttpHeaders httpHeaders = restTemplate.headForHeaders("http://localhost:8080/getallblade");
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<String> entity = new HttpEntity<String>(jsonRequest, headers);
        BladeView blade  = new BladeView();
        blade.setBladeId(id);
        blade.setAppStatus(false);
        blade.setOperStatus(false);
        blade.setPowerStatus(powerstatus);
        ArrayList<BladeView> list = new ArrayList();
        list.add(blade)
        ObjectMapper om = new ObjectMapper();
        String jsonRequest = jsonObjectMapper.writeValueAsString(blade);
        restTemplate.put(uri, entity);