hibernate课程 初探单表映射3-2 基本类型

本节内容：（介绍基本类型）

1　　　　数据类型 简介

2　　　　时间类型 简介

3　　　　时间类型 demo

1　　　　hibernate类型　　　　java类型

　　　　 integer/int　　　　　　java.lang.Integer/int

　　　　 string　　　　　　　　java.lang.String

2　　　 hibernate类型　　　　java类型　

　　　　 date　　　　　　　　java.util.Date或java.sql.Date　　　　　　年月日

　　　　time　　　　　　　　 java.util.Date或java.sql.Time　　　　　　 时分秒

　　　　timestamp　　　　　 java.util.Date或java.sql.Timestamp　　　　年月日时分秒

3　　　　　demo

hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/bendi</property>
<property name="connection.username">root</property>
<property name="connection.password"> </property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>

<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="hbm2ddl.auto">create</property>

<mapping resource = "Student.hbm.xml"/>
</session-factory>
</hibernate-configuration>

Student.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 2017-12-20 0:42:12 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.ddwei.student.Student" table="STUDENT">
<id name="pid" type="int">
<column name="PID" />
<generator class="increment" />
</id>
<property name="name" type="java.lang.String">
<column name="NAME" />
</property>
<property name="sex" type="java.lang.String">
<column name="SEX" />
</property>
<property name="birthday" type="date">
<!-- <property name="birthday" type="time"> -->
<!-- <property name="birthday" type="timestamp"> -->
<column name="BIRTHDAY" />
</property>
<property name="address" type="java.lang.String">
<column name="ADDRESS" />
</property>
</class>
</hibernate-mapping>

StudentTest.java

package hibernate_001;

import java.util.Date;

import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import org.hibernate.service.ServiceRegistry; import org.hibernate.service.ServiceRegistryBuilder; import org.junit.After; import org.junit.Before; import org.junit.Test;

import com.ddwei.student.Student;

public class StudentTest { private SessionFactory sessionFactory; private Session session; private Transaction trasaction; @Test public void testSaveStudent(){ // Student student =new Student(1,"周恩来","男",new Date(),"绍兴");//创建学生对象 Student student = new Student(); // student.setPid(100); student.setName("秦始皇"); student.setSex("男"); student.setBirthday(new Date()); student.setAddress("阿房宫"); session.save(student);//会话保存学生对象进入数据库 } @Before public void init(){ //1 创建配置对象 Configuration config = new Configuration().configure(); //2 创建服务对象 ServiceRegistry serviceRe = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry(); //3 创建会话工厂 sessionFactory = config.buildSessionFactory(serviceRe); //4 打开会话 session = sessionFactory.openSession(); //5 创建事务 trasaction = session.beginTransaction(); } @After public void destroy(){ trasaction.commit(); session.close(); sessionFactory.close(); }

}