如何在类中动态创建Jpa存储库？ [英] How to create Jpa repository dynamically inside a class?

问题描述

如何在类中创建和实例化jpa存储库？我遇到的情况是我必须为泛型类中的不同实体创建存储库。

How do I create and instantiate a jpa repository inside a class? I'm in a situation where I have to create repositories for different entities inside a generic class.

我可以轻松地为Neo4j存储库这样做，

I could do that easily for Neo4j repositories like,

GraphRepository<T> graphRepository;

this.neo4jTemplate = new Neo4jTemplate(new RestGraphDatabase(
    "http://localhost:7474/db/data"));
this.graphRepository = neo4jTemplate.repositoryFor(domainClass); 

对于JpaRepository，我检查了文档并找到了这个，

For JpaRepository, I checked the documentation and found this,

RepositoryFactorySupport factory = … // Instantiate factory here
UserRepository repository = factory.getRepository(UserRepository.class);

我不确定如何在上面的代码中实例化工厂。

I'm not sure how to instantiate factory in the above code.

我也不能通过指定域类来创建像Neo4j那样的存储库吗？

Also Can't I create repository like I did for Neo4j, by specifying the domain class?

推荐答案

我终于以这种方式工作了，

I finally got it working this way,

SimpleJpaRepository<User, Serializable> jpaRepository;
jpaRepository = new SimpleJpaRepository<User, Serializable>(
    User.class, entityManager);

使用SimpleJpaRepository，我可以使用所有存储库方法。

With SimpleJpaRepository, I can use all repository methods.

jpaRepository.save(user);

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