1.Hibernate默认连接池 v7u}nx
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<!-- 连接数据库的URL--> <?}g[]i
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<property name="connection.useUnicode">true</property> .]l2)OlLQ
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<property name="connection.characterEncoding">UTF-8</property> Gnq~1p5^
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<!--连接的登录名--> 0t0:soZx
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<property name="connection.username">root</property> a{.n(M
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<property name="connection.password"></property> m,q<R1
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<!--是否将运行期生成的SQL输出到日志以供调试-->
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<property name="show_sql">true</property> o`Brr:
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<!--指定连接的语言--> xq*yZ5:5Jo
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<property name="dialect">org.hibernate.dialect.MySQLDialect</property> Y>~zt -
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<!--映射Student这个资源--> 9>P(eN
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2.C3P0连接配置 x{5*%}lX8
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<property name="connection.useUnicode">true</property> i9tM]/SP
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<!--连接的登录名--> 2t<CAKBB
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<property name="hibernate.c3p0.timeout">120</property> .E(Ucnz/
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<property name="hibernate.c3p0.max_statements">100</property> wuCODz@~
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<property name="hibernate.c3p0.idle_test_period">120</property> ,
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<property name="hibernate.c3p0.acquire_increment">2</property> lCXo+|$?s
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<!--指定连接的语言--> ^<c?I re
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3.proxool连接池 1jR<H$aS
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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 TeHR,GB
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<driver-class>com.mysql.jdbc.Driver</driver-class> JVRK\A|R
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<!-- proxool自动侦察各个连接状态的时间间隔(毫秒),侦察到空闲的连接就马上回 vI4St;
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(2)配置hibernate.cfg.xml文件 /aP4'U8ov
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<property name="hibernate.proxool.pool_alias">DBPool</property> Ksr.'
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<property name="hibernate.proxool.xml">proxoolconf.xml</property> &z8I@^<
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<!--指定连接的语言--> ~H`~&?
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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
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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 g?-HAk6
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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。 ay4E\=k
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(4) dialect是声明SQL语句的方言 6_1v~#
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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。
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(6) <mapping >资源文件映射 )4u6{-|A
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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: MOp06
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hibernate.connection.datasource=java:/comp/env/jdbc/schoolproject //JNDI名 Y;n;7M<F
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hibernate.transaction.factory_class = org.hibernate.transaction.JTATransactionFactory >AFX}N#
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hibernate.transaction.manager_loopup_class = "kHFt|%@
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hibernate.dialect=org.hibernate.dialect.MySQLDialect TX/Ng+v S