呼叫服務異常Jackson日期轉換異常-Error while extracting response for type...省略...while it seems to fit format
阿新 • • 發佈：2018-12-13
寫自動化單元測試用例的時候出錯, 錯誤資訊:
2018-10-03 20:41:47.099 INFO 10068 --- [ main] com.imooc.util.RestUtil : rest-post-json-請求引數:<{"id":"T001","name":"靈活寶1號","status":"AUDITING","thresholdAmount":10,"stepAmount":1,"lockTerm":null,"rewardRate":3.42,"memo":null,"createAt":null,"updateAt":null,"createUser":null,"updateUser":null},{Content-Type=[application/json;charset=UTF-8], Accept=[application/json]}>
2018-10-03 20:41:47.368 INFO 10068 --- [o-auto-1-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-10-03 20:41:47.370 INFO 10068 --- [o-auto-1-exec-2] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2018-10-03 20:41:47.423 INFO 10068 --- [o-auto-1-exec-2] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 53 ms
2018-10-03 20:41:47.540 INFO 10068 --- [o-auto-1-exec-2] c.i.m.controller.ProductController : 增加產品, 引數: 注意這個錯誤資訊:
Error while extracting response for type [class com.imooc.entity.Product] and content type [application/json;charset=UTF-8]; nested exception is org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize value of type `java.util.Date` from String "2018-10-03 20:41:47": not a valid representation (error: Failed to parse Date value '2018-10-03 20:41:47': Cannot parse date "2018-10-03 20:41:47": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSZ', parsing fails (leniency? null)); nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.util.Date` from String "2018-10-03 20:41:47": not a valid representation (error: Failed to parse Date value '2018-10-03 20:41:47': Cannot parse date "2018-10-03 20:41:47": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSZ', parsing fails (leniency? null))
分析如下:
"Error while extracting response for type "拉取響應型別時出錯, "JSON parse error: Cannot deserialize value of type `java.util.Date`", 很明顯無法解析這個日期型別
我的工具類如下:
/**
* 傳送post 請求
*
* @param restTemplate
* @param url
* @param param
* @param responseType
* @param <T>
* @return
*/
public static <T> T postJSON(RestTemplate restTemplate, String url, Object param, Class<T> responseType) {
HttpEntity<String> formEntity = makePostJSONEntiry(param);
T result = restTemplate.postForObject(url, formEntity, responseType);
log.info("rest-post-json 響應資訊:{}", JsonUtil.toJson(result));
return result;
}
/**
* 生成json形式的請求頭
*
* @param param
* @return
*/
public static HttpEntity<String> makePostJSONEntiry(Object param) {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
headers.add("Accept", MediaType.APPLICATION_JSON_VALUE);
HttpEntity<String> formEntity = new HttpEntity<String>(
JsonUtil.toJson(param), headers);
log.info("rest-post-json-請求引數:{}", formEntity.toString());
return formEntity;
}因為jackson在轉換資料的時候預設是 'yyyy-MM-dd'T'HH:mm:ss.SSSZ,這樣的型別,
修改Product實體類, 加上如下註解即可
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
@Entity
public class Product {
/** 建立時間 */
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private Date createAt;
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
/** 更新時間 */
private Date updateAt;因為如下原因: 在呼叫postJSON請求方式的時候, 建立的是 yyyy-MM-dd HH:mm:ss 格式的日期, 而用 Product result 接收的時候,經過了我的程式碼中 toJson--> return mapper.writeValueAsString(obj); 轉換了, 所以就變成yyyy-MM-dd'T'HH:mm:ss.SSSZ, 就出錯了
@Test
@Transactional
public void create(){
normals.forEach(product -> {
Product result = RestUtil.postJSON(restTemplate,baseUrl + "/products",product,Product.class);
Assert.notNull(result.getName(),"建立產品失敗");
});
}