Question

I m 在static main 内形成我春季的背景方法

return new ClassPathXmlApplicationContext("applicationContext.xml");

在<条码>中应用 I m 接线

<bean id="dataSource" 
    class="org.springframework.jdbc.datasource.SingleConnectionDataSource">
    <property name="driverClassName">
        <value>${db.driverclassname}</value>
    </property>
    ...
</bean>

I ve got a .properties file on my category path that contained the Value db.driverclassname.

不幸的是,我犯了以下错误:

Property  driverClassName  threw exception; 
    nested exception is java.lang.IllegalStateException: 
        Could not load JDBC driver class [${db.driverclassname}]

我做了什么错误? I m

Answer 1

Don t You need a PropertyPlaceholderConfigurer ?

e.g.

<bean id="propertyConfigurer"      
      class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
   <property name="location">
      <value>classpath:project.properties</value>
   </property>
</bean>

本条详细使用。

Answer 2

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:your.properties</value>
            </list>
        </property>
        <property name="ignoreUnresolvablePlaceholders" value="true"/>
    </bean>

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