通过annotation来映射hibernate实体的,基于annotation的hibernate主键标识为@Id, 其⽣成规则由@GeneratedValue设定的.这⾥的@id和@GeneratedValue都是JPA的标准⽤法, JPA提供四种标准⽤法,由@GeneratedValue的源代码可以明显看出. 1Target({METHOD,FIELD}) 2 @Retention(RUNTIME) 3 public @interface GeneratedValue{...
可以在dao类添加org.springframework.stereotype.Repository 注解 或者可以在service类中使用 javax.annotation.Resource(替换org.springframework.beans.factory.annotation.Autowired) 注解注入dao 网上说可以安装 MyBatis mini-plugin插件 用了还是不好使idea解决@Data注解报红问题 lombok是一个可以通过简单的注解的形式来...
* The GeneratedValue annotation * may be applied to a primary key property or field of an entity or * mapped superclass in conjunction with the {@linkId} annotation. * The use of the GeneratedValue annotation is only * required to be supported for simple primary keys. Use of the * Gene...
SEVERE: Servlet.service()forservlet [dispatcher] in context with path [/frontend] threwexception[org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@javax.persistence.Id @javax.persistence.GeneratedValue int]forvalue'${c.catId}'; nest...