Spring with wildcards

Question

我想从多个位置加载键值对。我的第一个猜测是:

<util:properties id="requestProcessorRepository"
  location="classpath*:*requestProcessors.properties"/>

但它无效

Invocation of init method failed; nested exception is java.io.FileNotFoundException: class path resource [classpath*:*requestProcessors.properties] cannot be opened because it does not exist
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1412)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:546)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:872)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423)
    at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:84)
    at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:1)
    at org.springframework.test.context.TestContext.loadApplicationContext(TestContext.java:280)
    at org.springframework.test.context.TestContext.getApplicationContext(TestContext.java:304)
    ... 24 more

没有通配符，它​​开始工作。

那么从通配 rune 件创建属性对象/映射的任何其他可能性吗？

Answer 1

首先，你的资源路径classpath*:*requestProcessors.properties不可靠(来自 Spring Reference ):

Please note that "classpath*:" when combined with Ant-style patterns will only work reliably with at least one root directory before the pattern starts, unless the actual target files reside in the file system. This means that a pattern like "classpath*:*.xml" will not retrieve files from the root of jar files but rather only from the root of expanded directories.

如果你解决了这个问题，你可以按如下方式加载属性:

<bean id = "requestProcessorRepository" 
    class = "org.springframework.beans.factory.config.PropertiesFactoryBean">
    <property name = "locations" 
        value = "classpath*:somefolder/*requestProcessors.properties" />
</bean>

(原始版本的代码更复杂，但没有必要，因为 Spring 会自动将带通配符的路径转换为 ​​ Resource[])。