享受痛苦就是走向成功的第一步。
一、创建一个项目(lib里面是需要的夹包小奶瓶要导包)
二、书写大配置文件
大配置文件必须放置在项目根目录(专业classpath下):界定:就是src
1名称:hibernate.cfg.xml
<?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> <!-- Database connection settings 数据库连接设置--> <!-- 驱动类 --> <property name="connection.driver_class">oracle.jdbc.OracleDriver</property> <property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property> <property name="connection.username">sa</property> <property name="connection.password">1</property> <!-- SQL dialect (sql的方言)--> <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property> <!-- Echo all executed SQL to stdout 在控制台打印后台的sql语句--> <property name="show_sql">true</property> <!-- 格式化显示sql --> <property name="format_sql">true</property> <!-- Drop and re-create the database schema on startup 序列化--> <property name="hbm2ddl.auto">update</property> <mapping resource="hibernate.hbm.xml" /> </session-factory> </hibernate-configuration>
三、创建小配置
1、名称:hibernate.hbm.xml
<?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"> <hibernate-mapping package="cn.happy.entity"> <class name="Student" table="STUDENT"> <id name="sid" column="SID"> <!-- 主键生成策略:native: native:如果后台是Oracle 后台是MySQL,自动应用自增 --> <generator class="native" /> </id> <property name="name" type="string" column="NAME" /> <property name="age" /> </class> </hibernate-mapping>
四、测试类
import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; import cn.happy.entity.Student; public class Test { /** * @param args */ public static void main(String[] args) { //addAll();//添加信息 //getAll();//查看信息 //deleteAll();//删除信息 UpdateAll();//修改信息 } //添加信息 public static void addAll(){ Student stu = new Student(); //stu.setSid(2); stu.setName("聆听"); stu.setAge(20); // 1.1读取大配置文件,获取要连接的数据库信息 Configuration cfg = new Configuration().configure(); // 1.2创建SessionFactory SessionFactory factory = cfg.buildSessionFactory(); // 1.3加工session Session session = factory.openSession(); Transaction tx = session.beginTransaction(); // 02.Hibernate 帮我保存 session.save(stu); tx.commit(); System.out.println("save ok!"); } //查看全部信息 public static void getAll(){ //读取配置文件 Configuration conf=new Configuration().configure(); //创建SessionFactory SessionFactory sf=conf.buildSessionFactory(); //打开session Session se=sf.openSession(); //加载数据 Student dept=(Student)se.get(Student.class, new Integer( 21)); System.out.println(dept.getName());//输入数据 System.err.println(dept.getAge()); //关闭会话 if(se!=null){ se.close(); } } //删除信息 public static void deleteAll(){ //读取数据文件 Configuration conf=new Configuration().configure(); //创建SessionFactory SessionFactory se=conf.buildSessionFactory(); //打开session Session session=se.openSession(); //开始一个事务 Transaction tx=session.beginTransaction(); //获取部门的对象 Student stu=(Student)session.get(Student.class, new Integer(22)); //删除对象(持久化操作) session.delete(stu); //提交事务 tx.commit(); System.out.println("删除成功"); //回滚事务 tx.rollback(); System.out.println("删除回滚"); //关闭session if(session!=null){ session.close(); } } public static void UpdateAll(){ //读取数据文件 Configuration conf=new Configuration().configure(); //创建SessionFactory SessionFactory se=conf.buildSessionFactory(); //打开session Session session=se.openSession(); //开始一个事务 Transaction tx=session.beginTransaction(); //获取部门的对象 Student stu=(Student)session.get(Student.class, new Integer(2)); //修改信息 stu.setName("女王"); //提交事务 tx.commit(); /*http://blog.csdn.net/woxueliuyun/article/details/3930335*/ System.out.println("修改成功"); //回滚事务 tx.rollback(); System.out.println("修改回滚"); //关闭session if(session!=null){ session.close(); } } }
时间: 2024-10-23 23:38:33