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?我的情况是，我必须为通用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.

对于 Neo4j 存储库，我可以轻松做到这一点，

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，我查看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.

我也不能像 Neo4j 那样通过指定域类来创建存储库吗?

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

推荐答案

我终于可以这样了，

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

通过 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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