Hibernate之通过hibernate.cfg.xml配置文件访问数据库的例子

hibernate.cfg.xml文件内容：

<?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="dialect">org.hibernate.dialect.MySQLDialect</property>
  <property name="connection.autocommit">true</property>
  <property name="connection.useUnicode">true</property>
  <property name="connection.characterEncoding">UTF-8</property>
  <property name="hibernate.current_session_context_class">thread</property>
  <property name="show_sql">true</property>
  <property name="format_sql">true</property>
  <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
  <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test?useUnicode=true&amp;amp;characterEncoding=utf8</property>
  <property name="hibernate.connection.username">root</property>
  <property name="hibernate.connection.password">123456</property>
  <property name="hibernate.hbm2ddl.auto">update</property>
  <mapping resource="com/main/News.hbm.xml"/>
 </session-factory>
</hibernate-configuration>

News.hbm.xml文件内容：

<?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 2015-7-27 16:52:17 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
    <class name="com.main.News" table="NEWS">
        <id name="id" type="int">
            <column name="ID" />
            <generator class="assigned" />
        </id>
        <property name="title" type="java.lang.String">
            <column name="TITLE" />
        </property>
        <property name="content" type="java.lang.String">
            <column name="CONTENT" />
        </property>
    </class>
</hibernate-mapping>

一个简单的insert操作：

Configuration conf = new Configuration().configure();
SessionFactory sf = conf.buildSessionFactory();
Session sess = sf.openSession();
Transaction tx = sess.beginTransaction();
News n = new News();
n.setId(11);
n.setTitle("Title2");
n.setContent("Content2");
sess.save(n);
n.setContent("editedContent");
tx.commit();