spring 读取properties的两种方法

1.在配置文件中配置PropertyPlaceholderConfigurer
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    1. <bean class=”org.springframework.beans.factory.config.PropertyPlaceholderConfigurer”>
    2. <property name=”locations” value=”classpath:com/foo/jdbc.properties”/>
    3. </bean>
然后在需要的地方直接以下方式引用:

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    1. <property name=”url” value=”${jdbc.url}”/>
2.在配置文件中加入
beans的命名空间声明如下:
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    1. <beans xmlns=”http://www.springframework.org/schema/beans”
    2. xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xmlns:context=”http://www.springframework.org/schema/context”
    3. xmlns:aop=”http://www.springframework.org/schema/aop” xmlns:tx=”http://www.springframework.org/schema/tx”
    4. xsi:schemaLocation=”http://www.springframework.org/schema/beans
    5. http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    6. http://www.springframework.org/schema/context
    7. http://www.springframework.org/schema/context/spring-context-3.0.xsd
    8. http://www.springframework.org/schema/aop
    9. http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    10. http://www.springframework.org/schema/tx
    11. http://www.springframework.org/schema/tx/spring-tx-3.0.xsd”>
用到了

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    1. xmlns:context=http://www.springframework.org/schema/context
配置如下:
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    1. <context:property-placeholder location=”dbconf.properties”/>

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