几种驱动在Hibernate的配置:
Druid: Hibernate操作数据库文件不会报错,jdts容易报错。
为了方便大家迁移,Druid的配置和DBCP是基本一致的,如果你原来是使用DBCP,迁移是十分方便的,只需要把corg.apache.commons.dbcp.BasicDataSource修改为om.alibaba.druid.pool.DruidDataSource就好了。
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<!-- <bean id="dataSource" class="java.sql.DriverManager.BasicDataSource" destroy-method="close">-->
<property name="url" value="jdbc:sqlserver://192.168.0.167:1433;DatabaseName=test" />
<property name="username" value="sa" />
<property name="password" value="sa" />
<property name="filters" value="stat" />
<property name="maxActive" value="20" />
<property name="initialSize" value="1" />
<property name="maxWait" value="60000" />
<property name="minIdle" value="1" />
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<property name="minEvictableIdleTimeMillis" value="300000" />
<property name="validationQuery" value="SELECT 'x'" />
<property name="testWhileIdle" value="true" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="poolPreparedStatements" value="true" />
<property name="maxPoolPreparedStatementPerConnectionSize" value="50" />
</bean>
在上面的配置中,通常你需要配置url、username、password、maxActive这几项。
在DruidDataSource中,你可以不配置DriverClass,它根据url自动识别。Druid能够自动识别20多中url,常见的JDBC Driver都包括了。
JDTS:
<bean id="dataSource" class="java.sql.DriverManager.BasicDataSource" destroy-method="close">
<!-- <bean id="dataSource" class="com.rh.RHBasicDataSource" destroy-method="close">-->
<property name="driverClassName" value="net.sourceforge.jtds.jdbc.Driver"/>
<property name="url" value="jdbc:jtds:sqlserver://192.168.0.167:1433/test"/>
<property name="username" value="sa"/>
<property name="password" value="sa"/>
<property name="maxActive" value="600"/>
<property name="maxWait" value="10000"/>
<property name="minIdle" value="500"/>
<property name="poolPreparedStatements" value="true"/>
<property name="defaultAutoCommit" value="true"/>
<property name="validationQuery" value="SELECT 1+1"/>
<property name="testOnBorrow" value="true"/>
</bean>
c3p0
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="connection.username">sa</property>
<property name="connection.url">jdbc:sqlserver://192.168.1.100:1433;databaseName=TestDB</property>
<property name="dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="connection.password">sa</property>
<property name="hibernate.c3p0.max_size">50</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.timeout">100</property>
<property name="hibernate.c3p0.idle_test_period">100</property>
<property name="hibernate.c3p0.max_statements">150</property>
<property name="hibernate.c3p0.acquire_increment">3</property>
<property name="hibernate.connection.driver_class">org.hibernate.dialect.SQLServerDialect</property>
<property name="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
<!--实体-->
<mapping class="gk.data.entities.User" />
......
</session-factory>
</hibernate-configuration>
JNDI +dbcp 连接池
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="connection.datasource">java:comp/env/jdbc/ManageDB</property>
<!--实体映射-->
<mapping class="com.data.entities.User" />
.....
</session-factory>
</hibernate-configuration>
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:comp/env/jndi/rh_cpm"> </property>
</bean>
在项目的webRoot/META-INF 文件夹下面新建 context.xml或者tomcat的conf/context.xml添加如下内容
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE XML>
<Context path="/Manage" docBase="Manage" debug="5" reloadable="true"
crossContext="true" >
<!-- 数据库连接 begin-->
<!-- 被操作库 -->
<Resource name="jdbc/ManageDB"
auth="Container"
type="javax.sql.DataSource"
maxActive="5"
maxIdle="5"
maxWait="5000"
factory="org.apache.commons.dbcp.BasicDataSourceFactory"
driverClassName="net.sourceforge.jtds.jdbc.Driver"
url="jdbc:jtds:sqlserver://192.168.1.100:1433/TestDB"
username="sa"
password="sa"
testOnBorrow="true"
testWhileIdle="true"
validationQuery="select getdate()" />
</Context>
连接池c3p0 ,Proxool ,Druid ,Tomcat Jdbc Pool对比测试
[/url]:[url]http://286.iteye.com/blog/1920417, 原文没有jdts的测试。
以下就是此次测试结果(本结果只供参考,更具体更准确的测试可以自行进行):
1.测试次数为10次时:
平均用时(单位:毫秒):
c3p0 32.26
Proxool 33.42
Druid 30.43
Tomcat Jdbc Pool 37.61
2.测试次数为100次时:
平均用时(单位:毫秒):
c3p0 409.94
Proxool 447.49
Druid 382.7
Tomcat Jdbc Pool 386.3
3.测试次数为500次时:
平均用时(单位:毫秒):
c3p0 1700.95
Proxool 2053.85
Druid 1777.36
Tomcat Jdbc Pool 1749.02
4.测试次数为1000次时:
平均用时(单位:毫秒):
c3p0 3549.29
Proxool 3435.8
Druid 3167.59
Tomcat Jdbc Pool 3162.25