Document

注意：本次的记录是在上一篇Hibernate入门的基础上应用的

1.目录

2.实体类修改

package com.itheima.domain;

/*
 * 客户的javaBean
 * @author chenyanlong
 */
public class Customer {
    private Long cust_id;
    private String cust_name;
    private Long cust_user_id;
    private Long cust_create_id;
    private String cust_source;
    private String cust_industry;
    private String cust_level;
    private String cust_linkman;
    private String cust_phone;
    private String cust_mobile;
    public Long getCust_id() {
        return cust_id;
    }
    public void setCust_id(Long cust_id) {
        this.cust_id = cust_id;
    }
    public String getCust_name() {
        return cust_name;
    }
    public void setCust_name(String cust_name) {
        this.cust_name = cust_name;
    }
    public Long getCust_user_id() {
        return cust_user_id;
    }
    public void setCust_user_id(Long cust_user_id) {
        this.cust_user_id = cust_user_id;
    }
    public Long getCust_create_id() {
        return cust_create_id;
    }
    public void setCust_create_id(Long cust_create_id) {
        this.cust_create_id = cust_create_id;
    }
    public String getCust_source() {
        return cust_source;
    }
    public void setCust_source(String cust_source) {
        this.cust_source = cust_source;
    }
    public String getCust_industry() {
        return cust_industry;
    }
    public void setCust_industry(String cust_industry) {
        this.cust_industry = cust_industry;
    }
    public String getCust_level() {
        return cust_level;
    }
    public void setCust_level(String cust_level) {
        this.cust_level = cust_level;
    }
    public String getCust_linkman() {
        return cust_linkman;
    }
    public void setCust_linkman(String cust_linkman) {
        this.cust_linkman = cust_linkman;
    }
    public String getCust_phone() {
        return cust_phone;
    }
    public void setCust_phone(String cust_phone) {
        this.cust_phone = cust_phone;
    }
    public String getCust_mobile() {
        return cust_mobile;
    }
    public void setCust_mobile(String cust_mobile) {
        this.cust_mobile = cust_mobile;
    }
    @Override
    public String toString() {
        return "Customer [cust_id=" + cust_id + ", cust_name=" + cust_name + ", cust_user_id=" + cust_user_id
                + ", cust_create_id=" + cust_create_id + ", cust_source=" + cust_source + ", cust_industry="
                + cust_industry + ", cust_level=" + cust_level + ", cust_linkman=" + cust_linkman + ", cust_phone="
                + cust_phone + ", cust_mobile=" + cust_mobile + "]";
    }

    
}

3.HibernateUtils.java

package com.itheima.utils;

import javax.servlet.jsp.jstl.core.Config;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

/*
 * Hibernate框架的工具
 * @author chenyanlong
 */
public class HibernateUtils {

    //Curl+shift+x
    private static final Configuration CONFIG;
    private static final SessionFactory FACTORY;
    
    //编写静态代码
    static {
        //加载配置文件
        CONFIG =new Configuration().configure();
        //构造工厂
        FACTORY=CONFIG.buildSessionFactory();
    }
    
    /*
     * 从工厂获取Session对象
     * @return
     */
    public static Session getSession() {
        return FACTORY.openSession();
        
    }
}

4. 保存数据

/*
     * 1 保存数据
     */
    @Test
    public void testSave(){
        /*
         * 1.先加载配置文件
         * 2.创建SessionFactory对象，生成Session对象
         * 3.创建Sesison对象
         * 4.开启事务
         * 5.编写保存代码
         * 6.提交事务
         * 7.释放资源
         */
        
        //1.加载配置文件
        Configuration config=new Configuration();
        //默认加载src目录下hibernate.cfg.xml的配置文件
        config.configure();
        //2.创建SessionFactory对象
        SessionFactory factory=config.buildSessionFactory();
        //3.创建session对象
        Session session=factory.openSession();
        //4.开启事务
        Transaction tr=  session.beginTransaction();
        
        //5.编写保存代码
        Customer customer = new Customer();
        customer.setCust_name("小李");
        customer.setCust_source("小广告");

        
        session.save(customer);
        //6.提交事务
        tr.commit();
        
        //7.释放资源
        session.close();
        factory.close();
    }
    

5.测试工具类

    /*
     * 2 测试工具类
     */
    @Test
    public void testSave2(){
        //原来:加载配置文件，获取Factory对象，获取Session
        Session session=HibernateUtils.getSession();
        Transaction tr=session.beginTransaction();
        Customer c=new  Customer();
        c.setCust_name("小陈");
        session.save(c);
        
        //提交事务
        tr.commit();
        //释放资源
        session.close();
        
    }

6.测试get()方法

    /*
     * 3 测试get()方法,获取查询，通过主键查询一条记录
     */
    @Test
    public void testSave3(){
        //原来:加载配置文件，获取Factory对象，获取Session
        Session session=HibernateUtils.getSession();
        Transaction tr=session.beginTransaction();
        
        //测试查询的两个参数，arg0查询javaBean的class对象，arg1主键的值
        Customer c=session.get(Customer.class, 95L);
        System.out.println(c);
        
        
        //提交事务
        tr.commit();
        //释放资源
        session.close();    
    }

7.删除方法

    /*
     * 4 测试删除的方法
     * 注意:删除或者修改，先查询再删除或者修改
     */
    @Test
    public void testDel(){
        //原来:加载配置文件，获取Factory对象，获取Session
        Session session=HibernateUtils.getSession();
        Transaction tr=session.beginTransaction();
        
        //测试查询的两个参数，arg0查询javaBean的class对象，arg1主键的值
        Customer c=session.get(Customer.class, 95L);
        System.out.println(c);
        
        //删除客户
        session.delete(c);
        
        //提交事务
        tr.commit();
        //释放资源
        session.close();    
    }
    

8.测试修改

/*
     *5 测试修改
     */
    @Test
    public void testUpdate(){
        //原来:加载配置文件，获取Factory对象，获取Session
        Session session=HibernateUtils.getSession();
        Transaction tr=session.beginTransaction();
        
        //测试查询的两个参数，arg0查询javaBean的class对象，arg1主键的值
        Customer c=session.get(Customer.class, 94L);
        System.out.println(c);
        
        //设置客户信息
        c.setCust_name("小龙虾");
        
        //修改或是更新
        session.update(c);
        
        //session.saveOrUpdate(c); 添加或是修改
        //提交事务
        tr.commit();
        //释放资源
        session.close();    
    }

9.测试查询方法

/*
     * 测试查询方法
     */
    @Test
    public void testSel() {
        //加载配置文件
        Session session =HibernateUtils.getSession();
        Transaction tr=session.beginTransaction();
        
        //创建查询的接口
        Query query=session.createQuery("from Customer");
        
        //查询所有的数据
        List<Customer> list=query.list();
        for(Customer customer:list) {
            System.out.println(customer);
        }
        
        //提交事务
        tr.commit();
        
        //释放资源
        session.close();
        
    }