hibernate.cfm.xml的配置详解

                xml version='1.0' encoding='gb2312'?>


          "-//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">com.mysql.jdbc.Driver property>

            <property name="hibernate.connection.url">jdbc:mysql://localhost/hibernate hibernate>

          <property name="hibernate.connection.username">root property>

          <property name="hibernate.connection.password">123456 property>

          <property name="hibernate.connection.pool.size">20 property>

        <property name="hibernate.show_sql">true property>

        <property name="jdbc.fetch_size">50 property>

        <property name="jdbc.batch_size">23 property>

        <property name="jdbc.use_scrollable_resultset">false property>

        <property name="Connection.useUnicode">true property>

    <property name="connection.characterEncoding">gbk property>


          <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect property>

          <mapping resource="org/mxg/UserInfo.hbm.xml">
  session-factory>
  hibernate-configuration>



  <bean id="dataSource"
  class="org.apache.commons.dbcp.BasicDataSource"
  destroy-method="close">
//连接驱动
  <property name="driverClassName" value="${jdbc.driverClassName}" />
//连接url,
<property name="url" value="${jdbc.url}" />
//连接用户名
  <property name="username" value="${jdbc.username}" />
//连接密码
  <property name="password" value="${jdbc.password}" />
bean>

<bean id="hbSessionFactory"
  class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="configLocation">
//hibernate配置文件位置
  <value>WEB-INF/hibernate.cfg.xml value>
  property>
  <property name="configurationClass"
  value="org.hibernate.cfg.AnnotationConfiguration" />
  <property name="hibernateProperties">
  <props>
  //针对oracle数据库的方言,特定的关系数据库生成优化的SQL
    <prop key="hibernate.dialect">
    org.hibernate.dialect.OracleDialect
    prop>
  //选择HQL解析器的实现
    <prop key="hibernate.query.factory_class">
    org.hibernate.hql.ast.ASTQueryTranslatorFactory
    prop>
    //是否在控制台打印sql语句
    <prop key="hibernate.show_sql">true prop>
    //在Hibernate系统参数中hibernate.use_outer_join被打开的情况下,该参数用来允许使用outer join来载入此集合的数据。
    <prop key="hibernate.use_outer_join">true prop>
  //默认打开，启用cglib反射优化。cglib是用来在Hibernate中动态生成PO字节码的，打开优化可以加快字节码构造的速度
  <prop key="hibernate.cglib.use_reflection_optimizer">true prop>
  //输出格式化后的sql,更方便查看
  <prop key="hibernate.format_sql">true prop>
  //“useUnicode”和“characterEncoding”决定了它是否在客户端和服务器端传输过程中进行Encode，以及如何进行Encode
  <prop key="hibernate.connection.useUnicode">true prop>
  //允许查询缓存, 个别查询仍然需要被设置为可缓存的.
  <prop key="hibernate.cache.use_query_cache">false prop>
  <prop key="hibernate.default_batch_fetch_size">16 prop>
    //连接池的最大活动个数
    <prop key="hibernate.dbcp.maxActive">100 prop>
  //当连接池中的连接已经被耗尽的时候，DBCP将怎样处理(0 = 失败,1 = 等待,2  =  增长)
    <prop key="hibernate.dbcp.whenExhaustedAction">1 prop>
    //最大等待时间
    <prop key="hibernate.dbcp.maxWait">1200 prop>
    //没有人用连接的时候，最大闲置的连接个数
    <prop key="hibernate.dbcp.maxIdle">10 prop>
    ##以下是对prepared statement的处理，同上。
    <prop key="hibernate.dbcp.ps.maxActive">100 prop>
    <prop key="hibernate.dbcp.ps.whenExhaustedAction">1 prop>
    <prop key="hibernate.dbcp.ps.maxWait">1200 prop>
    <prop key="hibernate.dbcp.ps.maxIdle">10 prop>
  props>
  property>
bean>