Tomcatでデータベースプロパティを保存するdatabase.propertiesファイルをSpring MVCに格納する

Question

私のSpring MVC Webアプリケーションでは、database.propertiesというファイルをTomcatフォルダの下に追加しました。今、私は次のようにそのファイルからすべてのプロパティをロードしようとしています：私のroot-contxt.xmlファイルでは、

<bean 
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> 
    <property name="location" value = "file:${catalina.base}/conf/database.properties"> 
    </property> 
    </bean> 

    <bean id="dataSource" 
     class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
    <property name="driverClassName" value="${database.driverClassName}" /> 
    <property name="url" value="${database.url}" /> 
    <property name="username" value="${database.username}" /> 
    <property name="password" value="${database.password}" /> 
    </bean> 

そしてdatabase.propertiesファイルで、私が持っている、

database.driverClassName=my.Driver 
database.url=url 
database.username=uname 
database.password=pwd 

をしかし、私は次のエラーを取得しています：

19:42:10.409 [localhost-startStop-1] ERROR o.s.web.context.ContextLoader - Context initialization failed 
org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'dataSource' defined in class path resource [spring/core/root-context.xml]: Could not resolve placeholder 'database.driverClassName' in string value "${database.driverClassName}"; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'database.driverClassName' in string value "${database.driverClassName}" 
    at org.springframework.beans.factory.config.PlaceholderConfigurerSupport.doProcessProperties(PlaceholderConfigurerSupport.java:211) ~[spring-beans-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.beans.factory.config.PropertyPlaceholderConfigurer.processProperties(PropertyPlaceholderConfigurer.java:223) ~[spring-beans-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.beans.factory.config.PropertyResourceConfigurer.postProcessBeanFactory(PropertyResourceConfigurer.java:86) ~[spring-beans-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:265) ~[spring-context-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:162) ~[spring-context-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:606) ~[spring-context-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:462) ~[spring-context-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) ~[spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) [spring-web-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4720) [catalina.jar:8.0.18] 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5154) [catalina.jar:8.0.18] 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:8.0.18] 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) [catalina.jar:8.0.18] 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399) [catalina.jar:8.0.18] 
    at java.util.concurrent.FutureTask.run(Unknown Source) [na:1.8.0_31] 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_31] 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_31] 
    at java.lang.Thread.run(Unknown Source) [na:1.8.0_31] 
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'database.driverClassName' in string value "${database.driverClassName}" 
    at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:174) ~[spring-core-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:126) ~[spring-core-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.beans.factory.config.PropertyPlaceholderConfigurer$PlaceholderResolvingStringValueResolver.resolveStringValue(PropertyPlaceholderConfigurer.java:259) ~[spring-beans-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.beans.factory.config.BeanDefinitionVisitor.resolveStringValue(BeanDefinitionVisitor.java:282) ~[spring-beans-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.beans.factory.config.BeanDefinitionVisitor.resolveValue(BeanDefinitionVisitor.java:204) ~[spring-beans-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.beans.factory.config.BeanDefinitionVisitor.visitPropertyValues(BeanDefinitionVisitor.java:141) ~[spring-beans-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.beans.factory.config.BeanDefinitionVisitor.visitBeanDefinition(BeanDefinitionVisitor.java:82) ~[spring-beans-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    at org.springframework.beans.factory.config.PlaceholderConfigurerSupport.doProcessProperties(PlaceholderConfigurerSupport.java:208) ~[spring-beans-4.1.4.RELEASE.jar:4.1.4.RELEASE] 
    ... 18 common frames omitted 

はそれを修正する方法はあります....

Answer 1

あなたがどのようなパスをプロパティファイルに定義したのですか？