原文地址:https://blog.csdn.net/csujiangyu/article/details/50945486
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场景
假如有以下属性文件dev.properties, 需要注入下面的tagtag=123
通过PropertyPlaceholderConfigurer
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="dev.properties" /></bean>代码@Value("${tag}")
private String tag;通过PreferencesPlaceholderConfigurer<bean id="appConfig" class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer"> <property name="location" value="dev.properties" /></bean>代码:@Value("${tag}")
private String tag;通过PropertiesFactoryBean <bean id="config" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="location" value="dev.properties" /> </bean>代码:@Value("#{config['tag']}")
private String tag;通过util:properties效果同PropertiesFactoryBean一样代码:
@Value("#{config['tag']}")
private String tag;其他方式有时也可以不通过文件,直接写字面量<bean id="appConfig" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<!--<property name="location" value="classpath:${env}.properties" />--> <property name="properties"> <props> <prop key="tag">123</prop> </props> </property></bean>代码:@Value("${tag}")
private String tag;--------------------- 作者:Ydoing 来源:CSDN 原文:https://blog.csdn.net/csujiangyu/article/details/50945486?utm_source=copy 版权声明:本文为博主原创文章,转载请附上博文链接!