春天的多個屬性。 PropertyPlaceholderConfigurer類中的屬性

Question

我正在嘗試創建彈簧項目。我的目標是在將來爲罐子和戰爭建立項目。 我在包含「conf.path.dir」屬性的類路徑中使用abc.properties文件。戰爭和jar項目使用來自不同位置的配置。我將在構建時替換abc.properties，並使用它來配置我的PropertyPlaceholderConfigurer bean。

<bean id="first" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" 
     autowire-candidate="false"> 
    <property name="ignoreUnresolvablePlaceholders" value="true"/> 
    <property name="locations"> 
     <list> 
      <value>classpath:abc.properties</value> 
     </list> 
    </property> 
</bean> 

<bean id="second" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" depends-on="first"> 
    <property name="ignoreUnresolvablePlaceholders" value="true"/> 
    <property name="locations"> 
     <list> 
      <value>classpath:ax/add.properties</value> 
      <value>${conf.path.dir}/main.properties</value> 
     </list> 
    </property> 
</bean> 

不幸的是參數不能確定，我得到了以下錯誤：

{2015\04\01 11:11:58} (ERROR) #com.mys.FooService# The service got unexpected error: 
org.springframework.beans.factory.BeanInitializationException: Could not load properties; nested exception is java.io.FileNotFoundException: class path resource [${conf.path.dir}/main.properties] cannot be opened because it does not exist 
    at org.springframework.beans.factory.config.PropertyResourceConfigurer.postProcessBeanFactory(PropertyResourceConfigurer.java:87) 
    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.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139) 
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83) 
    at com.mys.FooService.start(FooService.java:149) 
    at com.mys.FooService$1ServiceInstanceLock.<init>(FooService.java:12) 
    at com.mys.FooService.main(FooService.java:137) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140) 
Caused by: java.io.FileNotFoundException: class path resource [${conf.path.dir}/main.properties] cannot be opened because it does not exist 
    at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:157) 
    at org.springframework.core.io.support.EncodedResource.getInputStream(EncodedResource.java:143) 
    at org.springframework.core.io.support.PropertiesLoaderUtils.fillProperties(PropertiesLoaderUtils.java:98) 
    at org.springframework.core.io.support.PropertiesLoaderSupport.loadProperties(PropertiesLoaderSupport.java:175) 
    at org.springframework.core.io.support.PropertiesLoaderSupport.mergeProperties(PropertiesLoaderSupport.java:156) 
    at org.springframework.beans.factory.config.PropertyResourceConfigurer.postProcessBeanFactory(PropertyResourceConfigurer.java:78) 
    ... 13 more 

Spring版本：3.2.4 如何解決這個問題並解決abc.properties 「conf.path.dir」 ？

Answer 1

嘗試

<value>file:///#{conf.path.dir}/main.properties</value> 

這應該解決您的問題更換

<value>${conf.path.dir}/main.properties</value> 

。