Spring中的@Value读取并注入配置信息

@Value不仅可以读取配置文件中的信息 还可以使用SpEL进行运算操作

The first step

文件：musicer.properties内容：musicer.age=56musicer.song=my heart will go on

The second step

Spring文件内容<bean id="musicerProp" class="org.springframework.beans.factory.config.PropertiesFactoryBean">        <property name="locations">            <array>                <value>classpath:musicer.properties</value>            </array>        </property></bean><bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">        <property name="properties" ref="musicerProp"/></bean>

The third step

@Value("#{musicerProp['musicer.age']}")private Integer age;@Value("#{musicerProp['musicer.song']}")private String song;

结果打印：

age: 56 Playing my heart will go on :