hibernate 入门案例

1，创建工程，导入jar

ojdbc14.jar 数据库驱动包，我用的是oracle数据库，根据实际的数据库选择驱动包

 

 创建java类，并利用bibernate插件完成orm映射，创建hbm.xml  cfg.xml

调整下表名称和主键生成方式

创建测试代码

 

 

 

package com.lxl.it.vo;

public class Student {
private String name;
private int age;
private int id;
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public int getAge() {
    return age;
}
public void setAge(int age) {
    this.age = age;
}
public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}
@Override
public String toString() {
    return "Student [name=" + name + ", age=" + age + ", id=" + id + "]";
}

}

<?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 2016-9-5 14:36:05 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
 <class name="com.lxl.it.vo.Student" table="STUDENT">
  <id name="id" type="int">
   <column name="ID"/>
    <generator class="sequence">
                <param name="sequence">SEQ_LXL_TEST</param>
    </generator>
  </id>
  <property generated="never" lazy="false" name="name" type="java.lang.String">
   <column name="NAME"/>
  </property>
  <property generated="never" lazy="false" name="age" type="int">
   <column name="AGE"/>
  </property>
 </class>
</hibernate-mapping>

<?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="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="hibernate.connection.password">bspdev</property>
        <property name="hibernate.connection.url">jdbc:oracle:thin:@10.202.6.37:1521:bspdev1</property>
        <property name="hibernate.connection.username">bsp</property>
        <property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
    <!-- 执行操作时是否在控制台打印 SQL -->
  <property name="show_sql">true</property>
  <!-- 是否对 SQL 进行格式化 -->
  <property name="format_sql">true</property>
      <!-- 生成数据表的策略 -->
        <property name="hbm2ddl.auto">update</property>
  <!-- 指定自动生成数据表的策略 -->
  <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
  <!-- 指定关联的 .hbm.xml 文件 -->
  <mapping resource="com/atguigu/hibernate/helloworld/News.hbm.xml"/>
     <mapping resource="com/lxl/it/vo/Student.hbm.xml"/>
 </session-factory>
</hibernate-configuration>

package com.lxl.it.vo;

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;

public class StudentTest {
    private SessionFactory sessionFactory;
    private Session session;
    private Transaction transaction;

    @Before
    public void init() {
        Configuration configuration = new Configuration().configure();
        ServiceRegistry serivceRegistry = new ServiceRegistryBuilder()
                .applySettings(configuration.getProperties())
                .buildServiceRegistry();
        sessionFactory=configuration.buildSessionFactory(serivceRegistry);
        session =sessionFactory.openSession();
        transaction=session.beginTransaction();
    }
    @After
    public void destory(){
        transaction.commit();
        session.close();
        sessionFactory.close();
    }
    @Test
    public void testSessionCache(){
        Student s=(Student)session.get(Student.class, 1);
        System.out.println(s);
        Student s2=(Student)session.get(Student.class, 1);
        System.out.println(s);
    }

    @Test
    public void test() {
        Configuration configuration = new Configuration().configure();
        ServiceRegistry serviceRegistry = new ServiceRegistryBuilder()
                .applySettings(configuration.getProperties())
                .buildServiceRegistry();
        SessionFactory sessionFactory = configuration
                .buildSessionFactory(serviceRegistry);
        Session session = sessionFactory.openSession();
        Transaction transcation = session.beginTransaction();
        Student s = new Student();
        s.setAge(10);
        s.setName("lxl");
        session.save(s);
        transcation.commit();
        session.close();
        sessionFactory.close();
    }
}