【Java】QBC检索和本地SQL检索

Hibenate的QBC查询

1.获取到CriteriaBuilder对象

CriteriaBuilder builder = session.getCriteriaBuilder();

2.获取CriteriaQuery

CriteriaQuery criteriaQuery = builder.createQuery(Department.class);

3.获取到根对象, 构造各种各样的查询条件

Root root=criteriaQuery.from(Department.class);

Predicate predicate = builder.like(root.get("departmentName"), "%A%");

Predicate predicate2 = builder.equal(root.get("departmentId"), 10);

Predicate predicate3 = builder.and(predicate,predicate2);

criteriaQuery.select(root.get("departmentId"));

criteriaQuery.where(predicate3);

4.获取到Query对象

Query query = session.createQuery(criteriaQuery);

5.执行并返回查询结果集

query.list()

直接看本地SQL查询：