批量查詢：原生sql查詢（查詢所有、條件查詢、分頁查詢）

1、查詢所有的學生信息：

（1）查詢結果中，一條信息放入到一個數組中，從list集合中取出數組，並對數組進行遍歷。

public class GeneratorTest {
    public static void testSel() {
            Session session = HibernateUtils.openSession();
            Transaction transaction = session.beginTransaction();
            String sql="Select * from Student";
            SQLQuery sqlQuery=session.createSQLQuery(sql);
            List<Object[]>list= sqlQuery.list();
            for(Object[] objects:list){
                System.out.println(Arrays.toString(objects));
            }
            System.out.println(list);
            transaction.commit();
            session.close();
        }

 （2）直接封裝到學生對象中，將對象存儲到list集合：

public static void testSel() {
            Session session = HibernateUtils.openSession();
            Transaction transaction = session.beginTransaction();
            String sql="Select * from Student";
            SQLQuery sqlQuery=session.createSQLQuery(sql);
            sqlQuery.addEntity(Student.class);
            List<Student>list= sqlQuery.list();
            System.out.println(list);
            transaction.commit();
            session.close();
        }

 

 2、占位符的使用：

    public static void testSel() {
            Session session = HibernateUtils.openSession();
            Transaction transaction = session.beginTransaction();
            String sql="Select * from Student where sex=?";
            SQLQuery sqlQuery=session.createSQLQuery(sql);
            sqlQuery.setParameter(0,"女");
            sqlQuery.addEntity(Student.class);
            List<Student>list= sqlQuery.list();
            System.out.println(list);
            transaction.commit();
            session.close();
        }

3、分頁查詢：

public static void testSel() {
            Session session = HibernateUtils.openSession();
            Transaction transaction = session.beginTransaction();
            String sql="Select * from Student limit ?,?";
            SQLQuery sqlQuery=session.createSQLQuery(sql);
            sqlQuery.setParameter(0,0);
            sqlQuery.setParameter(1,1);
            sqlQuery.addEntity(Student.class);
            List<Student>list= sqlQuery.list();
            System.out.println(list);
            transaction.commit();
            session.close();
        }