1.Hibernate默认连接池 fS$;~@p
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<!DOCTYPE hibernate-configuration N6HeZB":
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<property name="connection.driver_class">com.mysql.jdbc.Driver</property> HR;I}J 9
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<property name="connection.useUnicode">true</property> 8S7#tb@3
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<property name="connection.characterEncoding">UTF-8</property> iK=QP+^VN
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<!--连接的登录名--> pI_dV44W
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<property name="show_sql">true</property> d<6m_!L
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<property name="dialect">org.hibernate.dialect.MySQLDialect</property> lQd7p+21
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<!--映射Student这个资源--> hI9q);g
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2.C3P0连接配置 C T\@>!'f
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<property name="connection.username">root</property> 993f6
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<property name="hibernate.c3p0.timeout">120</property> XTo7fbW*
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3.proxool连接池 (-21h0N[V
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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 sD:o
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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 |_;kQ(,
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<maximum-new-connections>20</maximum-new-connections> 74Jx\(d
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<prototype-count>5</prototype-count> d@ZDIy
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(2)配置hibernate.cfg.xml文件 (HAdr5
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<property name="hibernate.proxool.pool_alias">DBPool</property> z(A60b}
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<property name="hibernate.proxool.xml">proxoolconf.xml</property> {L$$"r,
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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 m2m
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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 -medD G
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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。 c{kpgN
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(4) dialect是声明SQL语句的方言 C#[P<=v
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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。 b|V<Kp
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(6) <mapping >资源文件映射 Q0-gU+ig
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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: I`+,I`~u
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hibernate.connection.datasource=java:/comp/env/jdbc/schoolproject //JNDI名 #y&5pP:@
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hibernate.transaction.factory_class = org.hibernate.transaction.JTATransactionFactory otaRA
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hibernate.transaction.manager_loopup_class = w.rcYywI
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hibernate.dialect=org.hibernate.dialect.MySQLDialect 7Tp+]"bL