Spring中PropertyPlaceholderConfigurer的使用(一)

曾经终败给现在 2022-06-18 06:45 189阅读 0赞

<bean id="propertyConfigurerForAnalysis" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location">
            <value>classpath:/spring/include/dbQuery.properties</value>
        </property>
    </bean>

其中classpath是引用src目录下的文件写法。

当存在多个Properties文件时，配置就需使用locations了：(2)

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
           <list>
              <value>classpath:/spring/include/jdbc-parms.properties</value>
              <value>classpath:/spring/include/base-config.properties</value>
            </list>
        </property>
    </bean>

接下来我们要使用多个PropertyPlaceholderConfigurer来分散配置，达到整合多工程下的多个分散的Properties 文件，其配置如下：(3)

<bean id="propertyConfigurerForProject1" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="order" value="1" />
        <property name="ignoreUnresolvablePlaceholders" value="true" />
        <property name="location">
           <value>classpath:/spring/include/dbQuery.properties</value>
        </property>
    </bean>

<bean id="propertyConfigurerForProject2" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="order" value="2" />
        <property name="ignoreUnresolvablePlaceholders" value="true" />
        <property name="locations">
          <list>
            <value>classpath:/spring/include/jdbc-parms.properties</value>
            <value>classpath:/spring/include/base-config.properties</value>
          </list>
        </property>
    </bean>

其中order属性代表其加载顺序，而ignoreUnresolvablePlaceholders为是否忽略不可解析的 Placeholder，如配置了多个PropertyPlaceholderConfigurer，则需设置为true