春天的多种特性。 PropertyPlaceholderConfigurer类中的属性

Question

I'm trying to create spring project. My goal is build project for jar and war in the future. I use abc.properties file in the classpath which contains "conf.path.dir" property. War and jar projects use configuration from different locations. And I'm about to replace abc.properties at build time and use that to configure my 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>

Unfortunately parameter cannot be determined and I got the following error:

{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 version: 3.2.4 How to fix that and resolve "conf.path.dir" from abc.properties?

Answer 1

Try replacing

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

with

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

That should solve your problem.