bean.xml读取properties属性文件

把数据库的相关配置写到properties属性文件中。

beans.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:aop="http://www.springframework.org/schema/aop"
     xmlns:context="http://www.springframework.org/schema/context"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context-3.0.xsd
         http://www.springframework.org/schema/aop
         http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
   <!-- 打开Spring的Annotation支持 -->
   <context:annotation-config/>
   <!-- 设定Spring 去哪些包中找Annotation -->
   <context:component-scan base-package="org"/>
   
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<property name="driverClassName" value="${jdbc.driverClassName}" />
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
	</bean>
<!-- 导入Src目录下的jdbc.properties文件 -->
	<context:property-placeholder location="jdbc.properties"/>
</beans>

 jdbc.properties文件：

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/test
jdbc.username = root
jdbc.password = root