Spring Load profile cannot resolve placeholder problem: Could not resolve placeholder ' from ' in string value ' ${from} '

Could not resolve placeholder ' from ' in string value ' ${from} '

Solve:

In spring's XML configuration file, when there are multiple *.properties files that need to be loaded,

Should be loaded centrally in an XML file, it is recommended to load in the main XML file, i.e. (Applicationcontext.xml),

This does not require attention to the child XML file and *.properties loading order issues

Load multiple *.properties files, separated by ', '

<context:property-placeholder location= "Classpath:db.properties,classpath:mail.properties"/>

Keep it in mind!

Spring Load profile cannot resolve placeholder problem: Could not resolve placeholder ' from ' in string value ' ${from} '