spring 整合框架的时候 commons-pool 是啥包，干啥用的？

Posted 2023-02-22

参考技术A “commons-pool.jar”包主要是配置数据池连接用的。
如配置bean.xml。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

<bean id="service" class="com.bluedot.bookAdministrate.service.FindService">
<property name="dao" ref="dao"></property>
</bean>
<bean id="dao" class="com.bluedot.bookAdministrate.dao.FindDao">
<property name="hibernateTemplate" ref="hibernateTemplate"></property>
</bean>

<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:jdbc.properties</value>
</property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="mySessionFactory"></property>
</bean>

<bean id="myDataSource" destroy-method="close"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="$driverClassName" />
<property name="url" value="$url" ></property>
<property name="username" value="$jdbc.username" />
<property name="password" value="$jdbc.password" />
</bean>

<bean id="mySessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<!-- 使用数据源 -->
<property name="dataSource" ref="myDataSource" />
<!-- 设置实体对象映射文件 -->
<property name="mappingResources">
<list>
<value>com/bluedot/bookAdministrate/entity/BorrowBooks.hbm.xml</value>
<value>com/bluedot/bookAdministrate/entity/Books.hbm.xml</value>
<!-- <value>com/bluedot/bookAdministrate/entity/UserList.hbm.xml</value> -->
</list>
</property>
<!-- 设置hibernate的配置信息 -->
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">create</prop>
</props>
</property>
</bean>
<bean id="txManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="mySessionFactory"></property>
</bean>

<tx:advice id="txAd" transaction-manager="txManager">
<tx:attributes>
<tx:method name="get*" read-only="true" />
<tx:method name="*" />
</tx:attributes>
</tx:advice>

<aop:config>
<aop:pointcut expression="execution(public * com.bluedot.bookAdministrate.service.*.*(..))"
id="myPonitcut1" />
<aop:advisor advice-ref="txAd" pointcut-ref="myPonitcut1" />
</aop:config>

</beans> 参考技术B java数据库连接池 包追问

我数据库连接池用的是spring提供的类，为还要导入这个包呢？

追答

那要看你是用哪种链接方式了。
spring 中也有的包要依赖别的包。
如：
DBCP类包commons-dbcp.jar，DBCP是一个依赖commons-pool对象池机制的数据库连接池，所以在类路径下还必须包括commons-pool.jar。

追问

哦 我用的就是dbcp

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