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Not able to find Spring "classpath:" location

I have a Spring Project where I am using bean configuration file
beans.xml.Inside the bean Configuration file, i have defined some properties for a PlaceHolder which refers to classPath...While the application is running, the properties are getting loaded from /unknownPath/Dev/Loc1/System.properties
Where
${BUS_ENV}=Dev
${LOCATION1}=Loc1
<bean id="placeholderProperties" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:${BUS_ENV}/${LOCATION1}/system.properties</value>
<value>classpath:${BUS_ENV}/lbsprocessor.properties</value>
</list>
</property>
<!-- Force system properties to override any deployed runtime properties -->
<property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE"/>
<property name="ignoreUnresolvablePlaceholders" value="true" />
</bean>
I didn't specify classpath while running my project in IDE
I don't have those files in my resource folder
There are around 65 such files exists(for various reasons) as Dev/Loc1/System.properties
I am not able to find from which location the properties are getting referred. Even after debugging, I couldn't find out what classpath refers to. Please help me with figuring out

If you are using eclipse IDE right click on your project select properties then select Java Build Path. On first tab Source there is one input named Default Output folder that value is your classpath. Check all your properties files are there in that path.

Referring to your point 2 problems might be in these line
<value>classpath:${BUS_ENV}/${LOCATION1}/system.properties</value>
<value>classpath:${BUS_ENV}/lbsprocessor.properties</value>
You are using classpath for file location which means these properties file have to be in the .war file at /Dev/Loc1/System.properties
If properties files are outside of project may be at system level you can access them like this
<value>file:${BUS_ENV}/${LOCATION1}/system.properties</value>
<value>file:${BUS_ENV}/lbsprocessor.properties</value>
eg:
<value>file:/home/testuser/system.properties</value>

I am using Mac OS ,in this we are storing the Configurations as a jar file under
/Library/Java/Extension.So java is directly referring classpath to that location by default.

Spring PropertiesFactoryBean wildcard expansion not working

I'm trying to use PropertiesFactoryBean to load all files ending with .propfrom certain directory.
<bean id="props" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="location" value="file:/etc/app/*.prop"/>
</bean>
When running this as Junit test, everyting works OK and org.springframework.core.io.support.PropertiesLoaderSupport#loadProperties get list of all files (wildcard expanded) as FileSystemResource
and loads them.
However when running in OSGI environment (Karaf) PropertiesLoaderSupport#loadProperties will get single OsgiBundleResource with path set to /etc/app/*.prop which is invalid, of course.

Try to use the locations property instead of location (which supports only one resource)
<bean id="props" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="locations" value="file:/etc/app/*.prop"/>
</bean>

How to externalize properties file for web application(war)?

I have developed a webapplication which is having jsp and java code. Right now I have placed all the key-value into a env/lifecycle specific properties file (like conf-dev.properties,conf-stg.properties,conf-prod.properties).
I want to externalize these properties file so that it can be placed outside of war(without effecting the war).
right now war file is tightly coupled with properties file. if i have to modify any thing i have to build and make war and deploy.
I have very limited access on deployment server machine (only have access for one folder where i can put my configuration files) & deployment process is handled by CI(jenkin & automated script).
I explored on internet and came to know that we can achieve this using spring, would like to know what is the best way to achieve this?

As you are using Spring I suppose you already use PropertyPlaceholderConfigurer. If not you should ;)
The location of a property file can be anything that can be resolved as spring Resource. This includes classpath, servletcontext and also file references as URIs (file:///... For absolute paths)
https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/beans/factory/config/PropertyPlaceholderConfigurer.html
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="${config.file.location}" />
</bean>

If I understand your question, then you can use Class.getResourceAsStream(String) the linked Javadoc says (in part)
This method delegates to this object's class loader. If this object was loaded by the bootstrap class loader, the method delegates to ClassLoader.getSystemResourceAsStream(java.lang.String).

The better way to externalize env specific properties is to use "user.home" or "user.dir".

Thanks #Martin F..
Resolved:This is the final one i used and its working fine in dev,stage Env.
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="ignoreUnresolvablePlaceholders" value="false"/>
<property name="order" value="1"/>
<property name="locations">
<list>
<value>classpath:conf-${cisco.life}.properties</value>
<value>file:///${openshift.home}/data/conf-${cisco.life}.properties</value>
<value>file:${openshift.home}/data/conf-${cisco.life}.properties</value>
</list>
</property>
</bean>.
and i used script action hook in openshift to set the lifecycle on system level.
appname=echo $OPENSHIFT_APP_NAME
case "$appname" in
*dev)export JAVA_OPTS_EXT="${JAVA_OPTS_EXT} -Dcisco.life=dev";
echo "setting up env life dev for " $appname
;;
*stage)export JAVA_OPTS_EXT="${JAVA_OPTS_EXT} -Dcisco.life=stg;
echo "setting up env life as stg for " $appname.

how spring property resolver works?

I have property place holder in my spring context.xml file
<bean id="propertyConfigurer" class="com.techpleiad.poc.RMCPropertyUtil">
<property name="basenames" value="file:${config.file.dir}/prop_application" />
<property name="defaultEncoding" value="UTF-8" />
<property name="cacheSeconds" value="30"></property>
</bean>
and this property 'config.file.dir' is not getting resolved.
'config.file.dir' is the environment variable and when i debug the code and check for the basename the file path comes as it is.. '{config.file.dir}/prop_application'
I need to know what spring code/classes are involved in resolving such properties.
How i could debug and resolve this problem?

You'll need to register a PropertySourcesPlaceholderConfigurer with a reference to your property sources (or not since this is an environment property which are implicitly added).
With XML you can do that with
<context:property-placeholder location="classpath:spring.properties" />
With Java config, simply define a static #Bean annotated method which returns a PropertySourcesPlaceholderConfigurer.

You can try with Spring SpEL to get the system properties
#{systemProperties['config.file.dir']}
To read environment variable use
#{systemEnvironment['config.file.dir']}
The systemEnvironment property contains all the environment variables on the machine where the program is running. Meanwhile, the systemProperties contains all the properties that we set in Java when the application started, using the -D argument.

How to load properties file using system properties

I have a properties file which sits on APPSERVERS HOME directory(JBOSS_HOME/PROJECT_PROPERTIES/abc.properties).PROJECT_PROPERTIES is the directory where we are keeping all the project related property files.I need to read this properties file from spring config.Earlier i was using the following approach.
<bean id="propertyOverrideConfigurer"
class="org.springframework.beans.factory.config.PropertyOverrideConfigurer">
<property name="location" value="classpath:abc.properties" />
Now we moved all our properties file to JBOSS_HOME/PROJECT_PROPERTIES directory.
Please provide me some pointers how to access the properties file using spring.

This should help you out:
How to read properties in spring

You can pass the properties file path as a command line argument
<property name="location" value="${propertiesFile}" />
Then for the jvm parameters pass
-DpropertiesFile=my/configuration/file.properties