Oracle入门案例：
1.创建实体类Student 并重写ToString方法
package cn.happy.entity;
public class Student {
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Student [name=" + name + ", age=" + age + ", id=" + id + "]";
}
private String name;
private Integer age;
private Integer id;
}
2.导入jar包
3.创建大配置关联小配置
<?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="connection.driver_class">oracle.jdbc.OracleDriver</property>
<property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>
<property name="connection.username">scott</property>
<property name="connection.password">0123</property>
<!-- 输出所有 SQL 语句到控制台。 -->
<property name="hibernate.show_sql">true</property>
<!-- 在 log 和 console 中打印出更漂亮的 SQL。 -->
<property name="hibernate.format_sql">true</property>
<!-- 方言 -->
<property name="hibernate.dialect"> org.hibernate.dialect.Oracle10gDialect</property>
<property name="hbm2ddl.auto">update</property>
<mapping resource="cn/happy/entity/Student.hbm.xml"/>
</session-factory>
</hibernate-configuration>
4.编写小配置coding=‘utf-8‘?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.happy.entity">
<class name="Student" table="Student">
<id name="id" type="int" column="id">
</id>
<property name="name" type="string" column="name"/>
<property name="age" type="int" column="age"/>
</class>
</hibernate-mapping>
5.工具类
package cn.happy.entity;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
private static Configuration cfg=new Configuration().configure();
private static SessionFactory factory=cfg.buildSessionFactory();
//01.方法返回session
public static Session getSession(){
return factory.openSession();
}
//02.关闭session
public static void closeSession(){
getSession().close();
}
}
6.测试类
// 1.2 修改学生
@Test
public void updateTest(){
Session session = HibernateUtil.getSession();
//不被上下文跟踪对象
/*Student stu=new Student();
stu.setId(3);
stu.setName("微冷的雨训练营");*/
//方式二：如何用呗上下文跟踪的方式
//检索出一条记录，一个实体对象
Student stu= (Student)session.load(Student.class,3);
stu.setName("金龙加油！！！！");
Transaction tx = session.beginTransaction();
session.update(stu);
tx.commit();
HibernateUtil.closeSession();
System.out.println("update ok!");
}