spring读取properties和其他配置文件的几种方式

driver=com.mysql.jdbc.Driverurl=jdbc:mysql://localhost:3306/m_model?useUnicode=true&characterEncoding=utf8username=rootpassword=root

　　<bean id="propertyPlaceholderConfigurer" class="org.spring work.beans.factory.config.PropertyPlaceholderConfigurer">        <!-- 如果是单个文件可以按照注释的方式来配置 -->        <!-- <property name="location" value="classpath:conf/spring-config.properties"/> -->        <property name="locations">            <array>                <value>classpath:conf/spring-config.properties</value>            </array>        </property>    </bean>        <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">        <property name="driverClassName" value="${driver}"/>        <property name="url" value="${url}"/>        <property name="username" value="${username}"/>        <property name="password" value="${password}"/>    </bean>

　　 <context:property-placeholder location="classpath:conf/spring-config.properties"/>        <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">        <property name="driverClassName" value="${driver}"/>        <property name="url" value="${url}"/>        <property name="username" value="${username}"/>        <property name="password" value="${password}"/>    </bean>

url=jdbc:mysql://localhost:3306/m_model?useUnicode=true&characterEncoding=utf8

<context:property-placeholder location="classpath:conf/spring-config.properties" file-encoding="UTF-8"/>  

<util:properties id="config" location="classpath:conf/spring-config.properties"/>    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">        <property name="driverClassName" value="#{config.driver}"/>        <property name="url" value="#{config.url}"/>        <property name="username" value="#{config.username}"/>        <property name="password" value="#{config.password}"/>    </bean>    

@Value("#{config.username}")private String userName;