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使用maven构建hibernate
1:建立maven project
2:pom中添加hibernate支持包
1 <dependency> 2 <groupId>mysql</groupId> 3 <artifactId>mysql-connector-java</artifactId> 4 <version>5.1.31</version> 5 </dependency> 6 7 <dependency> 8 <groupId>org.hibernate</groupId> 9 <artifactId>hibernate-core</artifactId>10 <version>4.3.0.Final</version>11 </dependency>
3:创建实体类User
1 public class User {2 private Long id;3 private String title;4 private Date date;5 }
4:配置User.hbm.xml(文件放在工程根目录下)
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE hibernate-mapping PUBLIC 3 "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 4 "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 5 <hibernate-mapping > 6 <class name="com.zlt.hibernatedemo.User" table="user"> 7 <id name="id" column="id"> 8 <generator class="increment"></generator> 9 </id>10 11 <property name="date" column="data" type="timestamp"></property>12 <property name="title"></property>13 </class>14 15 </hibernate-mapping>
5:配置hibernate.cfg.xml(文件放在工程根目录下)
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE hibernate-configuration PUBLIC 3 "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 4 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 5 <hibernate-configuration> 6 <session-factory> 7 <property name="connection.driver_class">com.mysql.jdbc.Driver</property> 8 <property name="connection.url">jdbc:mysql://localhost:3306/hibernatetest</property> 9 <property name="connection.username">root</property>10 <property name="connection.password">root</property>11 12 <property name="dialect">org.hibernate.dialect.MySQLDialect</property>13 <property name="show_sql">true</property>14 <property name="hbm2ddl.auto">create</property>15 16 <mapping resource="User.hbm.xml"/>17 </session-factory>18 19 </hibernate-configuration>
6:创建session工具类 HibernateFactory.java
1 public class HibernateFactory { 2 //sessionFactory是一个线程安全的全局对象,只需要创建一次 3 public static final SessionFactory sessionFactory; 4 5 static { 6 try { 7 sessionFactory = new Configuration().configure().buildSessionFactory(); 8 } catch (Throwable ex) { 9 System.err.println("Initial SessionFactory creation failed." + ex);10 throw new ExceptionInInitializerError(ex);11 }12 }13 14 public static final ThreadLocal session = new ThreadLocal();15 16 public static Session currentSession() throws HibernateException {17 Session s = (Session) session.get();18 // Open a new Session, if this thread has none yet19 if (s == null) {20 s = sessionFactory.openSession();21 // Store it in the ThreadLocal variable22 session.set(s);23 }24 return s;25 }26 27 public static void closeSession() throws HibernateException {28 Session s = (Session) session.get();29 if (s != null)30 s.close();31 session.set(null);32 }33 34 }
7:测试程序
1 public class HibernateTest { 2 public static void main(String[] args) { 3 Session session = HibernateFactory.currentSession(); 4 Transaction tx = session.beginTransaction(); 5 User user = new User(); 6 user.setDate(new Date()); 7 user.setTitle("title"); 8 session.save(user); 9 10 tx.commit();11 session.close();12 }13 }
8:结果
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