hibernate连接池

1．Hibernate默认连接池 zLybf:#  
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2．C3P0连接配置 "YaT1`Kr  
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<property name="hibernate.c3p0.timeout">120</property> &TBF
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3．proxool连接池 dYrgL3'  
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(1) 先写proxool的配置文件，文件名：proxool.xml（一般放在与hibernate.cfg.xml文件在同一个目录中）本例配置的是MYSQL数据库，数据库的名字为schoolproject C*b[J  
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<driver-url> 5j`xSG  
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收,超时的销毁--> oK\zyN
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(2)配置hibernate.cfg.xml文件 ]Ucw&B*@  
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(1) hibernate.connection.provider_class定义Hibernate的连接加载类，这里Proxool连接池是用这个，不同的连接池有不同的加载类，可以查阅Hibernate文档获取相关信息 {g.YGO  
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(2) hibernate.proxool.pool_alias这里就是用我们上面提到的连接池的别名 + Tp% *  
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(3) hibernate.proxool.xml是向Hibernate声明连接池的配置文件位置，可以用相对或绝对路径，用相对路径时要注意一定在要Path范围内！不然会抛出异常。 Wo "s;Z  
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(4) dialect是声明ＳＱＬ语句的方言 S a
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(5) show_sql定义是否显示Hibernate生成的ＳＱＬ语言，一般在调试阶段设为true,完成后再改成false，这样有利于调试。 0;
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(6) <mapping >资源文件映射 WOn<;'}M&  
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4． JNDI连接池，数据源已经由应用服务配置好(如Web服务器)，Hibernate需要做的只是通过JNDI名查找到此数据源。应用服务器将连接池对外显示为JNDI绑定数据源，它是javax.jdbc.Datasource类的一个实例。只要配置一个Hibernate文件，如： 8|zavH#P  
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hibernate.connection.datasource=java:/comp/env/jdbc/schoolproject //JNDI名 |yk/iO(  
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hibernate.transaction.factory_class = org.hibernate.transaction.JTATransactionFactory :f[ w  
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hibernate.transaction.manager_loopup_class = 71@eJQ  
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hibernate.dialect=org.hibernate.dialect.MySQLDialect :6(\: