我尝试使用POST方法保存实体的数组,并为其余资源传递数组,但是出现错误:
org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not deserialize instance of br.com.servtech.almox.model.Item out of START_ARRAY token at [Source: org.apache.catalina.connector.CoyoteInputStream@2af1e451; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of br.com.servtech.almox.model.Item out of START_ARRAY token at [Source: org.apache.catalina.connector.CoyoteInputStream@2af1e451; line: 1, column: 1] at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:228) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE] at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readInternal(AbstractJackson2HttpMessageConverter.java:205) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
当我向一个对象发送数据时,数据保存得很好!
我的实体:
@Entity public class Item implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; @Basic private String name; @Basic private Integer quantity; @Basic private Double cash; @ManyToOne private Requirement requirement; //getters and setters }
我的资料库:
@RepositoryRestResource @CrossOrigin public interface ItemDAO extends CrudRepository<Item, Long> { }
数据:
[{ "name": "A1", "quantity": 3, "cash": 5.80 }, { "name": "B2", "quantity": 3, "cash": 5.80 }]
我试图使用Content-Type application / json并与text / uri-list一起使用。怎么了?我还有其他设置吗?
错误的是,它试图读取请求正文Item,而实际上是多个Items。
Item
Items
我相信您在这里有两个选择。在这种情况下,我通常要做的是创建另一个资源,例如ItemCollection,包装多个Items。然后,您可以使用标准的REST功能来ItemCollection处理,这实际上可以处理多个Items。
ItemCollection
您的第二个选择是手动替代一种方法来处理多个项目:http : //docs.spring.io/spring- data/rest/docs/current/reference/html/#customizing-sdr.overriding-sdr- response-处理程序