分析共享Spring配置数据源四种方式（附相应jar包）

分析共享Spring配置数据源四种方式（附相应jar包）

使用spring框架时，平常你都使用那种数据源呢？本篇博客将分享spring常用的四种配置数据源方式。
以下使用Oracle10g版本作为例子。
第一种：使用spring自带的DriverManagerDataSource
配置文件如下：

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<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" 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/aop http://www.springframework.org/schema/aop/spring-aop-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/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName"> <value>oracle.jdbc.driver.OracleDriver</value> </property> <property name="url"> <value>jdbc:oracle:thin:@192.168.24.102:1521:sms</value> </property> <property name="username"> <value>test</value> </property> <property name="password"> <value>test</value> </property> </bean> </beans>

<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context" 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/aop http://www.springframework.org/schema/aop/spring-aop-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/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> 
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>oracle.jdbc.driver.OracleDriver</value>
</property>
<property name="url">
<value>jdbc:oracle:thin:@192.168.24.102:1521:sms</value>
</property>
<property name="username">
<value>test</value>
</property>
<property name="password">
<value>test</value>
</property>
</bean>
</beans>

第二种：DBCP数据源。
需要下载的jar包：commons-dbcp.jar，commons-pool.jar
spring的配置文件中如下：

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<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"

destroy-method="close">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />

<property name="url" value="jdbc:oracle:thin:@192.168.24.102:1521:sms" />

<property name="username" value="test"/>

<property name="password" value="test" />

</bean>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:@192.168.24.102:1521:sms" />
<property name="username" value="test"/>
<property name="password" value="test" />

</bean>

第三种：C3P0数据源。
配置文件中如下：

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<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"

destroy-method="close">
<property name="driverClass" value="oracle.jdbc.driver.OracleDriver" />
<property name="jdbcUrl" value="jdbc:oracle:thin:@192.168.24.102:1521:sms " />
<property name="user" value="test" />
<property name="password" value="test" />

</bean>

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="oracle.jdbc.driver.OracleDriver" />
<property name="jdbcUrl" value="jdbc:oracle:thin:@192.168.24.102:1521:sms " />
<property name="user" value="test" />
<property name="password" value="test" />

</bean>

在配置c3p0数据源时，折腾许久，一直提示这个错误：

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java.sql.SQLException: No suitable driver at java.sql.DriverManager.getDriver(Unknown Source)
at com.mchange.v2.c3p0.DriverManagerDataSource.driver(DriverManagerDataSource.java:224)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:135)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)

java.sql.SQLException: No suitable driver	at java.sql.DriverManager.getDriver(Unknown Source)
at com.mchange.v2.c3p0.DriverManagerDataSource.driver(DriverManagerDataSource.java:224)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:135)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)

上网查阅很多资料，发现很多人同样为这个问题头疼，并且也给出了相应的解决办法，这个问题提示驱动不对，但是网上解决办法往往都是配置文件中的xml书写问题，若你在配置过程中出现此问题的话，可以参考这个解决办法，很令人无语的解决办法：http://kangzye.blog.163.com/blog/static/3681922320091033359708/
我在配置过程出现问题是jdbc书写马虎，导致此问题出现。o(︶︿︶)o唉
第四种：使用hibernate数据源
需要hiberante核心jar包。
目前三大框架较流行，spring一般与hiberante做搭档，数据库连接方式写在hiberante的配置文件中，在spring管理hibernate中的配置文件中，直接读取hibernate核心配置文件即可。
其中读取hibernate数据源与访问dao层的方式是配置在一块的。配置如下：

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<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocations"> <list> <value>classpath:com/config/hibernate.cfg.xml</value> </list> </property> <property name="mappingLocations"> <!-- 所有的实体类映射文件 --> <list> <value>classpath:com/hibernate/*.hbm.xml</value> </list> </property>

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocations">
<list>
<value>classpath:com/config/hibernate.cfg.xml</value>
</list>
</property>
<property name="mappingLocations">
<!-- 所有的实体类映射文件 -->
<list>
<value>classpath:com/hibernate/*.hbm.xml</value>
</list>
</property>

这是常用的几种配置方式，数据源配置好了，下一步是读取Dao层，使用spring如何读取dao层呢？
PS：DBCP数据源需要的jar包下载http://download.csdn.net/detail/llhhyy1989/4496980
C3P0数据源需要的jar包下载http://download.csdn.net/detail/llhhyy1989/4496988

原文链接：http://blog.csdn.net/llhhyy1989/article/details/7861212