Spring boot jpa 底层封装

pom:

javax.persistence
javax.persistence-api
2.2

org.springframework.boot
spring-boot-starter-data-jpa

1.BaseDao

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.repository.NoRepositoryBean;

@NoRepositoryBean
public interface BaseRepo extends JpaRepository,JpaSpecificationExecutor{

}

2.BaseEntity

import java.io.Serializable;
import javax.persistence.MappedSuperclass;

@MappedSuperclass
public class BaseEntity implements Serializable
{
private static final long serialVersionUID = 5316912770609152144L;

3.BaseService

import javax.annotation.Resource;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.transaction.annotation.Transactional;

/**
* 底层封装Service
* 提供一些基本操作
* @author x_luwl
*
*/
@Transactional(rollbackFor = Exception.class)
public class BaseService, D extends BaseEntity> {

private T dao;

protected void setDao(T dao) {
this.dao = dao;
}
public T getDao() {
return this.dao;
}

@Resource
@PersistenceContext
private EntityManager entityManager;