1.Hibernate默认连接池 e!#:h4I
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<property name="dialect">org.hibernate.dialect.MySQLDialect</property> 8d-_'MXk3
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2.C3P0连接配置 J*.qiUAgW
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<property name="hibernate.c3p0.timeout">120</property> EA8K*>'pv
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<property name="hibernate.c3p0.max_statements">100</property> ^^1rjh1I
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<property name="hibernate.c3p0.idle_test_period">120</property> u6j\@U6 I
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3.proxool连接池 +X#JCLD
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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 Y=94<e[f"
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<maximum-new-connections>20</maximum-new-connections> L!fiW`>0G
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<property name="hibernate.proxool.pool_alias">DBPool</property> T2;%@Ghc
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<property name="hibernate.proxool.xml">proxoolconf.xml</property> .kv/db
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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 ;][
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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 ;n-)4b]\
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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。 GCw<jHw
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(4) dialect是声明SQL语句的方言 f
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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。 "8pfLI
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(6) <mapping >资源文件映射 UV ?.KVD~
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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: |!0R"lv'u
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hibernate.connection.datasource=java:/comp/env/jdbc/schoolproject //JNDI名 $6~
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hibernate.transaction.factory_class = org.hibernate.transaction.JTATransactionFactory 8J&K_JC^
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hibernate.transaction.manager_loopup_class = un+U_|>c
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hibernate.dialect=org.hibernate.dialect.MySQLDialect \\j98(i