hibernate配置文件详细解析

雨点打透心脏的1/2处 2022-08-07 10:51 198阅读 0赞

<?xml version='1.0' encoding='gb2312'?> 
     
    <!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">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>