muecho
2019-01-30 14:30
// repository public interface EmployeeJpaRepo extends JpaRepository<Employee,Integer> { }
// EmployeeJpaRepoTest public class EmployeeJpaRepoTest { private ApplicationContext ctx = null; private EmployeeJpaRepo employeeJpaRepo = null; @Before public void setUp(){ ctx = new ClassPathXmlApplicationContext("bean-new.xml"); employeeJpaRepo = ctx.getBean(EmployeeJpaRepo.class); System.out.println(" setup is running..... "); } @After public void close(){ ctx = null; System.out.println(" close is running..... "); } @Test public void findOne(){ Employee employee = employeeJpaRepo.findOne(10); System.out.println(employee); //这个方法在JpaRepository接口中有出现,我开始觉得会返回一个Employee对象,结果看返回值是一个抽象类 //那么这个geOne方法放在类里面主要做什么用,该怎么用 employeeJpaRepo.getOne(11); System.out.println("id102是否存在"+employeeJpaRepo.exists(102)); } }
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