1.Hibernate默认连接池 Yq%9M=#k
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<!DOCTYPE hibernate-configuration mqSQL}vR
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<property name="connection.driver_class">com.mysql.jdbc.Driver</property> )C(?bR
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<property name="connection.useUnicode">true</property> 5yzv|mrx
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<property name="connection.characterEncoding">UTF-8</property> 2&^]k`Aj6D
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<!--连接的登录名--> zhpt%7So
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<property name="connection.username">root</property> |ayVjqJ*
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<property name="connection.password"></property> /M3Y~l$
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2.C3P0连接配置 8_tK4PwP
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<property name="hibernate.c3p0.timeout">120</property> *IY*yR6
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<property name="hibernate.c3p0.max_statements">100</property> "E8zh|m o
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<property name="hibernate.c3p0.idle_test_period">120</property> _`_%Y(Xat
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3.proxool连接池 '^Ql]% _
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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 p8\zG|b5
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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 #CnHf
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<house-keeping-sleep-time>90000</house-keeping-sleep-time> s%!`kWVJ.
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<!-- 指因未有空闲连接可以分配而在队列中等候的最大请求数,超过这个请求数的 qA:#iJ8w
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(2)配置hibernate.cfg.xml文件 45@]:2j
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<property name="hibernate.proxool.pool_alias">DBPool</property> BwJuYH7QJ$
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<property name="hibernate.proxool.xml">proxoolconf.xml</property> (D{Ys'{q
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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 FBsn;,3<W
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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 rF'R>/H
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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。 9B)lGLL}q
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(4) dialect是声明SQL语句的方言 74zSP/G'
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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。 hXX1<~k
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(6) <mapping >资源文件映射 " OGdE_E
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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: +$(0w35V5
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hibernate.connection.datasource=java:/comp/env/jdbc/schoolproject //JNDI名 _@E "7<\
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hibernate.transaction.factory_class = org.hibernate.transaction.JTATransactionFactory {(\(m/!Z
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hibernate.transaction.manager_loopup_class = ^'B-sz{{
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hibernate.dialect=org.hibernate.dialect.MySQLDialect m.V,I}J.q