hibernate配置文件hibernate.cfg.xml的详细解释

川长思鸟来 2022-08-27 07:52 172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>