1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xmlns:context="http://www.springframework.org/schema/context"
 5        xsi:schemaLocation="http://www.springframework.org/schema/beans
 6
 
        http://www.springframework.org/schema/beans/spring-beans.xsd
 7        http://www.springframework.org/schema/context
 8        http://www.springframework.org/schema/context/spring-context-4.2.xsd">
 9 
10     <!--測試bean引用外部屬性-->
11     <!--<config id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">-->
12
 
         <!--<property name="username" value="root"/>-->
13         <!--<property name="password" value="123456"/>-->
14         <!--<property name="url" value="jdbc:mysql://127.0.0.1:3306/ylws"/>-->
15         <!--<property name="driverClassName" value="com.mysql.jdbc.Driver"/>-->
16
 
     <!--</config>-->
17 
18     <!--引入外部屬性檔案-->
19    <context:property-placeholder location="classpath:config/jdbc.properties"/>
20 
21     <!--c3p0-->
22     <bean id="dataSourceC3p0" class="com.mchange.v2.c3p0.ComboPooledDataSource">
23         <!--引用properties檔案-->
24         <property name="user" value="${user}"/>
25         <property name="password" value="${password}"/>
26         <property name="jdbcUrl" value="${jdbcUrl}"/>
27         <property name="driverClass" value="${driverClass}"/>
28     </bean>
29 
30     <!--通過Properties配置屬性-->
31     <!--<config id="dataSource" class="com.spring.cn.configig.collections.DataSource">
32         <property name="properties">
33             <props>
34                 <prop key="username">root</prop>
35                 <prop key="password">123456</prop>
36                 <prop key="url">jdbc:mysql//localhost:3306?</prop>
37                 <prop key="driver">com.mysql.cj.jdbc.driver</prop>
38             </props>
39         </property>
40     </config>-->
41 </beans>

jdbc.properties

1 user=root
2 password=123456
3 jdbcUrl=jdbc:mysql://127.0.0.1:3306/ylws
4 driverClass=com.mysql.jdbc.Driver