Hibernate5.3.6之最簡單demo
阿新 • • 發佈:2018-12-17
剛開始學習hibernate,把自己做第一個demo記錄下來,方便以後檢視
jdk版本:1.8
MySQL版本:8.0
mysql連線驅動版本:8.0.12
Hibernate版本:5.3.6
1.這個是我的目錄結構:
需要的Hibernate包
2.編寫一個持久化類,這裡是一個User類
package com; public class User { private int id; private String name; private String password; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } User(){} User(String name, String password ){ this.name = name; this.password = password; } @Override public String toString() { return "User [name=" + name + ", password=" + password + "]"; } }
3.Hibernate對映
對映檔案的命名規則是*.hbm.xml,我這裡是User.hbm.xml,注意要與持久化類(User.java)放在同一個包下面
<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <!-- Generated 2018??10??16?? ????9:55:19 by Hibernate Tools 3.5.0.Final --> <hibernate-mapping> <class name="com.User" table="USER"> <id name="id" type="int"> <column name="ID" /> <generator class="native" /> </id> <property name="name" type="java.lang.String"> <column name="NAME" /> </property> <property name="password" type="java.lang.String"> <column name="PASSWORD" /> </property> </class> </hibernate-mapping>
4.Hibernate配置檔案
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:3306/test?useSSL=false&serverTimezone=UTC </property> <property name="hibernate.connection.driver_class">com.mysql.cj.jdbc.Driver</property> <property name="hibernate.connection.password">root</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property> <property name="hibernate.show_sql">true</property> <property name="hibernate.format_sql">true</property> <property name="hibernate.hbm2ddl.auto">update</property> <mapping class = "com.User"></mapping> <mapping resource="com/User.hbm.xml"/> </session-factory> </hibernate-configuration>
這裡要引入核心對映檔案,記得寫入完整路徑名:com/User.hbm.xml
5.編寫一個測試類
新建一個Junit測試用例,匯入相關包
package com;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.MetadataSources;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.junit.jupiter.api.Test;
class UserTest {
@Test
void test() {
/*User user = new User("123", "2123");
System.out.println(user.getId());*/
//建立工廠
SessionFactory sessionFaction = null;
//載入
Configuration configuration = new Configuration().configure();
ServiceRegistry serviceRegistry = configuration.getStandardServiceRegistryBuilder().build();
sessionFaction = new MetadataSources(serviceRegistry).buildMetadata().buildSessionFactory();
//建立、開啟會話
Session session = sessionFaction.openSession();
//建立事務
Transaction transaction = session.beginTransaction();
User user = new User("帥比","1433223");
session.save(user);
//提交事務
transaction.commit();
//關閉工廠
session.close();
//關閉工廠類
sessionFaction.close();
}
}