1.Hibernate默认连接池 [S.zWPX9{
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<!DOCTYPE hibernate-configuration OtT*)8*c
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<property name="connection.username">root</property> YtT:\#D
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<property name="dialect">org.hibernate.dialect.MySQLDialect</property> EnjSio0
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<!--映射Student这个资源--> .\AbE*lZ#
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2.C3P0连接配置 }tH6E
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<property name="hibernate.c3p0.max_size">20</property> E+e:UBeUV
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<property name="hibernate.c3p0.idle_test_period">120</property> FA3YiX(-e
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<property name="hibernate.c3p0.acquire_increment">2</property> 0JM`*f%n
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3.proxool连接池 -"~XI~a@Wo
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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 ?3=y]Vb+
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用户连接就不会被接受--> W:>XXUU
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<maximum-connection-count>100</maximum-connection-count> |7QSr!{_
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(2)配置hibernate.cfg.xml文件 Va[t'%~&zR
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<property name="hibernate.proxool.pool_alias">DBPool</property> PS8^=
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<property name="hibernate.proxool.xml">proxoolconf.xml</property> Lp(i&A
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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 56MY@
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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 |QD#Dx1_
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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。 c3 )jsf
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(4) dialect是声明SQL语句的方言 o/Q|R+yXV
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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。 :K 5?&kT
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(6) <mapping >资源文件映射 )U7fPKQ
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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]oolA:^4s
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hibernate.connection.datasource=java:/comp/env/jdbc/schoolproject //JNDI名 '1(6@5tyWk
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hibernate.transaction.factory_class = org.hibernate.transaction.JTATransactionFactory Ql%B=vgKL
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hibernate.transaction.manager_loopup_class = Nukyvse
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hibernate.dialect=org.hibernate.dialect.MySQLDialect S^;;\0#NK