Hibernate中的createQuery查詢一條數據、多條數據、分頁查詢數據

package com.ckinghan.test;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.classic.Session;
import org.junit.Test;

import com.ckinghan.bean.User;

public class HibernateQueryApi {

    /**
     * Hibernate 中的createQuery查詢一條數據、多條數據、分頁查詢數據
     */
    @Test
    public void hibernateQuery1(){
        //加載Hibernate的配置文件信息
        Configuration configuration = new Configuration().configure();
        //通過配置文件信息創建SessionFactory
        SessionFactory buildSessionFactory = configuration.buildSessionFactory();
        //通過SessionFactory獲取與當前線程綁定的Session
        Session currentSession = buildSessionFactory.getCurrentSession();
        //對Session啓動事務 
        Transaction transaction = currentSession.beginTransaction();
        //創建HQL的查詢語句
        Query createQuery = currentSession.createQuery("from User where id = 1");

        //獲取一條數據,但要注意，如果查詢返回的結果集是多條數據，會報錯,如果未查詢到數據，返回null
        User user  = (User) createQuery.uniqueResult();
        System.out.println("查詢一條數據：");
        System.out.println(user);

        //獲取多條數據，不管是調用uniqueResult()方法時還是調用list方法，都會重新執行一次SQL查詢語句
        List<User> users = (List<User>) createQuery.list();
        System.out.println("查詢多條數據:");
        System.out.println(users);

        //分頁功能,設置分頁的起始索引
        createQuery.setFirstResult(0);
        //設置分頁每次獲取的數據數量
        createQuery.setMaxResults(100);
        //查詢數據
        createQuery = currentSession.createQuery("from User");
        List<User> list = createQuery.list();
        //輸出查詢到的結果集
        System.out.println("分頁查詢數據：");
        System.out.println(list);

        //提交事務
        transaction.commit();
        //關閉SessionFactory
        buildSessionFactory.close();
    }
}

執行結果 如下：

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Hibernate: 
    select
        user0_.id as id0_,
        user0_.userName as userName0_,
        user0_.password as password0_ 
    from
        user user0_ 
    where
        user0_.id=1
查詢一條數據：
User [id=1, userName=userName, password=password123]
Hibernate: 
    select
        user0_.id as id0_,
        user0_.userName as userName0_,
        user0_.password as password0_ 
    from
        user user0_ 
    where
        user0_.id=1
查詢多條數據:
[User [id=1, userName=userName, password=password123]]
Hibernate: 
    select
        user0_.id as id0_,
        user0_.userName as userName0_,
        user0_.password as password0_ 
    from
        user user0_
分頁查詢數據：
[User [id=1, userName=userName, password=password123], User [id=2, userName=userName, password=password123]]