Spring —— 三种配置数据源的方式：spring内置、c3p0、dbcp

　　

01.Spring内置数据源配置
Class:DriverManagerDataSource
全限定名：org.springframework.jdbc.datasource.DriverManagerDataSource
不需要添加任何jar

02.apache的 dbcp数据源配置
Class:BasicDataSource
全限定名：org.apache.commons.dbcp.BasicDataSource
需要添加：com.springsource.org.apache.commons.dbcp-1.2.2.osgi.jar
com.springsource.org.apache.commons.pool-1.5.3.jar

03.c3p0的 数据源配置
Class：ComboPooledDataSource
全限定名：com.mchange.v2.c3p0.ComboPooledDataSource
需要添加：com.springsource.com.mchange.v2.c3p0-0.9.1.2.jar

引用外部的数据源配置信息设置：${jdbc.*}
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"></property>
<property name="jdbcUrl" value="${jdbc.url}"></property>
<property name="user" value="${jdbc.user}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean>

jdbc.properties

 jdbc.driver=oracle.jdbc.driver.OracleDriver
 jdbc.url=jdbc\:oracle\:thin\:@localhost\:\:orcl
 jdbc.user=zym
 jdbc.password=zymm

jdbc.properties

引用jdbc.properties 的两种方式书写：
<!-- 01.让Spring去寻找jdbc.properties -->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties"></property>
</bean>

<!-- 02.让Spring去寻找jdbc.properties -->
<context:property-placeholder location="classpath:jdb.properties"/>

 <?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:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="
         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
         ">
     <!--. Database connection settings spring内置 数据库连接设置-->
     <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">

         <!-- 驱动类 -->
         <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"></property>
         <!-- url地址 -->
         <property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl"></property>
         <property name="username" value="zym"></property>
         <property name="password" value="zymm"></property>
     </bean>

     <!-- .dbcp 配置数据源 -->
      <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
         <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"></property>
         <property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl"></property>
         <property name="username" value="zym"></property>
         <property name="password" value="zymm"></property>
     </bean>

     <!-- .c3p0 配置数据源 -->
     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
         <property name="driverClass" value="${jdbc.driver}"></property>
         <property name="jdbcUrl" value="${jdbc.url}"></property>
         <property name="user" value="${jdbc.user}"></property>
         <property name="password" value="${jdbc.password}"></property>
     </bean>

     <bean id="MyjdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
         <property name="dataSource" ref="dataSource"></property>
     </bean>
     <bean id="empDao" class="zym.jdbctemplate.dao.impl.EmpDaoImpl">
         <property name="jdbcTemplate" ref="MyjdbcTemplate"></property>
     </bean>

     <bean id="empService" class="zym.jdbctemplate.service.impl.IEmpServiceImpl">
         <property name="dao" ref="empDao"></property>
     </bean>

     <!-- 让Spring去寻找jdbc.properties -->
     <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
         <property name="location" value="classpath:jdbc.properties"></property>
     </bean>
 </beans>

三种方式配置code

三种方式配置code实例，带jar包版：链接：http://pan.baidu.com/s/1c2l2WwC 密码：d2mu