Could not resolve placeholder
2017-07-19 20:06
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Could not resolve placeholder
翻译过来的意思就是“无法解析占位符”我遇到了一个问题,便是如此
常出现在myeclipse中Spring的初始化的过程中,是加载property配置文件的错误信息
信息如下
org.springframework.beans.factory.BeanDefinitionStoreException:
和
Invalid bean definition with name ‘xxxx’ defined in class path resource [Spring/applicationContext.xml]:
和
Could not resolve placeholder ‘xxxx’ in string value “${xxxx}”
我遇到问题的详细错误信息
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'dataSource' defined in class path resource [Spring/applicationContext.xml]: Could not resolve placeholder 'jdbc.driverClass ' in string value "${jdbc.driverClass }" at org.springframework.beans.factory.config.PlaceholderConfigurerSupport.doProcessProperties(PlaceholderConfigurerSupport.java:209) at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.processProperties(PropertySourcesPlaceholderConfigurer.java:174) at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.postProcessBeanFactory(PropertySourcesPlaceholderConfigurer.java:151) at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:694) at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:669) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:461) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4745) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5207) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3800) at org.apache.catalina.startup.HostConfig.reload(HostConfig.java:1377) at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1350) at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1586) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:280) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:94) at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1164) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1388) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1392) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1360) at java.lang.Thread.run(Thread.java:745)
通常可能的情况
文件路径错误使用了多个
PropertyPlaceholderConfigurer
重复使用了
<context:property-placeholder>
解决方法
对于重复来说是添加ignore-unresolvable="true"属性
如:
<context:property-placeholder location="yyy.properties" ignore-unresolvable="true" />
而我所遇到的问题的不是以上,而是拼写错误——空格
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driverClass }"></property> .......
在value里的表达式里多了一个空格
${jdbc.driverClass }
更改后
${jdbc.driverClass}
问题解决了
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