I wrote the code, but the jpa is not saved. select statement works but save or saveall doesn't. No way to solve it? Existing batches except for commercial work well, but only the newly created commercial step does not work. Below is the corresponding code. BatchConfiguration.java @Confi...
I generated a Web application and then reverse engineered a MySQL database into the Web ap using JPA and Hibernate. So far I have been able to use the findAll() method to return a list of table contents. But when I go to an input form, fill out the data and then attempt to do a...
您需要使用JpaTransactionManager,但您说I tried using JPATransactionManager as well, but it failed....
JPA 2.1是在Java 8之前发布的,因此不支持新的日期和时间API。因此,检查horaDevolucion和horaRetiro...
JPA中save和saveAndFlush的区别,首先直接看图: save是CrudRepository下的。 saveAndFlush是JpaRepository下的。 一般情况下save就足够了,但是如果在同一个transaction里,比如你在方法上标了@Transactional,这时你想先保存Order,然后直接在这个Transaction里保存OrderItem,但是OrderItem... ...
My entity id is generated, and it was working fine when I use DAO instead of Spring data JPA. @Id @Column(name = TABLE_COLUM_NAME_ID) @GeneratedValue private int id; Now I have starting to use Spring data JPA, and after I call repository.save(myboject), or repository.saveAndFlush(...
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1 //类似于 Hibernate 的 save 方法,使对象由临时状态变为持久化对象 2 //和 Hibernate 的 save 方法的区别为若有 id 属性,则不会执行插入操作而会抛出异常 3 @Test 4 public void testPersistence() { 5 Customer customer = new Customer();
I believe there are two methods because there are two different ways of working with an EntityManager. One way is to make all changes to the objects while the EntityManager is open (while the objects are in a managed state). The other way is to load your objects in one EntityManager, clo...
If the MapKey is not specified it defaults to the target object's Id. JPA Repository save方法具体实现如下:(SimpleJpaRepository) @Transactionalpublic S save(S paraEntity) {if(entityInformation.isNew(paraEntity)) {//根据id是否存在判断是否为new。这里的new是相对于Persistence Context而言的,而非针对...