新版本的jpa需要变更方法名:将findOne()改为findById
Optional<Employee> employee =employeeJpaRepository.findById(196);
employeeJpaRepository.existsById(102));
Optional<Employee> employee =employeeJpaRepository.findById(196);
employeeJpaRepository.existsById(102));
2018-11-22
最新回答 / 慕UI7532152
import org.junit.After; import org.junit.Before; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class SpringDataTest { /*...
2018-11-21
最新回答 / Youare_my_sunshine
@JoinColumn(name = "appr_coun", referencedColumnName = "dic_key")这个注解 实体类中的上面加上你要关联的实体类里面的字段就可以啦,属性就是那个实体类
2018-11-06
最赞回答 / Future_来
<dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>4.3.6.Final</version> </dependency>导包错误,误导入了 hibernate-core 依赖
2018-08-23