Hibernate(5)原生sql查詢（複雜查詢）

 

適用於複雜的多表查詢

查詢所有對象，返回數組

    @Test
    public void test(){
        //1.獲得session
        Session session = HibernateUtils.getCurrentSession();
        //2.獲得事務
        Transaction tx = session.beginTransaction();
        //3.執行操作
        //3.1書寫sql語句
        String sql = "select * from cst_customer";
        //3.2創建sql查詢對象
        NativeQuery sqlQuery = session.createSQLQuery(sql);
        //3.3  調用方法查詢結果
        List<Object[]> list = sqlQuery.list();
        //sqlQuery.uniqueResult();
        for (Object[] objs: list){
            System.out.println(Arrays.toString(objs));

        }
        //4.提交事務
        tx.commit();


    }

查詢所有對象，返回對象

    @Test
    public void test2(){
        //1.獲得session
        Session session = HibernateUtils.getCurrentSession();
        //2.獲得事務
        Transaction tx = session.beginTransaction();
        //3.執行操作
        //3.1書寫sql語句
        String sql = "select * from cst_customer";
        //3.2創建sql查詢對象
        NativeQuery sqlQuery = session.createSQLQuery(sql);
        //將結果集封裝到對象中
        sqlQuery.addEntity(Customer.class);

        //3.3  調用方法查詢結果
        List<Customer> list = sqlQuery.list();
        //sqlQuery.uniqueResult();
        System.out.println(list);
        //4.提交事務
        tx.commit();


    }

條件查詢

@Test
    public void test3(){
        //1.獲得session
        Session session = HibernateUtils.getCurrentSession();
        //2.獲得事務
        Transaction tx = session.beginTransaction();
        //3.執行操作
        //3.1書寫sql語句
        String sql = "select * from cst_customer where cust_id = ?";
        //3.2創建sql查詢對象
        NativeQuery sqlQuery = session.createSQLQuery(sql);
        sqlQuery.setParameter(1,1);
        //將結果集封裝到對象中
        sqlQuery.addEntity(Customer.class);

        //3.3  調用方法查詢結果
        List<Customer> list = sqlQuery.list();
        //sqlQuery.uniqueResult();
        System.out.println(list);
        //4.提交事務
        tx.commit();


    }

 

分頁查詢

@Test
    public void test4(){
        //1.獲得session
        Session session = HibernateUtils.getCurrentSession();
        //2.獲得事務
        Transaction tx = session.beginTransaction();
        //3.執行操作
        //3.1書寫sql語句
        String sql = "select * from cst_customer limit ?,?";
        //3.2創建sql查詢對象
        NativeQuery sqlQuery = session.createSQLQuery(sql);
        sqlQuery.setParameter(1,0);
        sqlQuery.setParameter(2,4);
        //將結果集封裝到對象中
        sqlQuery.addEntity(Customer.class);

        //3.3  調用方法查詢結果
        List<Customer> list = sqlQuery.list();
        //sqlQuery.uniqueResult();
        System.out.println(list);
        //4.提交事務
        tx.commit();


    }