Hibernate JPA 如何使用SQL文直接查询

public List<Partner> findPartners() {
List<Partner> partnerList = new ArrayList<>();
// 这里的em是注入的EntityManager
        List<Object> partners = this.em.createNativeQuery("select id, no, name from partner").getResultList();

for(Object obj : partners){
Object[] objArray = this.convertToObjectArray(obj);

Partner partner = new Partner();
partner.setId(objArray[0].toString());
partner.setNo(objArray[1].toString());
partner.setName(objArray[2].toString());

partnerList.add(partner);
}

return partnerList;
}

// 将Object转化为数组
private Object[] convertToObjectArray(Object array) {
Class ofArray = array.getClass().getComponentType();
if (ofArray.isPrimitive()) {
List ar = new ArrayList();
int length = Array.getLength(array);
for (int i = 0; i < length; i++) {
ar.add(Array.get(array, i));
}
return ar.toArray();
}
else {
return (Object[]) array;
}
}