JpaQueryProvider (Spring Batch 4.1.4.RELEASE API)

所有已知实现类:
AbstractJpaQueryProvider, JpaNativeQueryProvider
```
public interface JpaQueryProvider
```
Interface defining the functionality to be provided for generating queries for use with JPA ItemReaders or other custom built artifacts.
从以下版本开始:
2.1
作者:
Anatoly Polinsky, Dave Syer

方法概要

所有方法实例方法抽象方法
修饰符和类型	方法	说明
`javax.persistence.Query`	`createQuery()`	Create the query object.
`void`	`setEntityManager(javax.persistence.EntityManager entityManager)`	Provide an `EntityManager` for the query to be built.

- 方法详细资料
  - createQuery
```
javax.persistence.Query createQuery()
```
    Create the query object.
    返回:
    created query
  - setEntityManager
```
void setEntityManager(javax.persistence.EntityManager entityManager)
```
    Provide an EntityManager for the query to be built.
    参数:
    entityManager - to be used by the JpaQueryProvider.