The storage set for the jar package describes the JRE System library,referenced libraries,web App Libraries

JRE System library,referenced libraries,web App Libraries

These three are all storage collections of JAR packages

  the JRE System Library primarily stores J2SE standard jars, which are generally not required for adjustment.
 

referenced Libraries is a jar package that holds a third party, which is the jar package that you import. Configured in libraries in the Java Build path of the project properties. I understand that

The jar packages are imported and configured to allow Web projects to compile properly in the Eclipse development environment without error. If the Web project uses Eclipse to generate a war package,

is not exporting its jar package to the Web-inf/lib folder.

Web App Libraries The main purpose of this is to have eclipse export the war package to export all of the jar or project references in its directory to the Web-inf/lib file .

Clamp down. The jar package in Web APP libraries is configured in the Java EE Module dependencies of the project properties in Eclipse. If you hook up, or add an external jar

Packages are generated under the Web-inf/lib folder. Of course, if you are directly under the Web-inf/lib folder, copy a jar into it, refresh it, Web App Libraries

A reference to a jar is also automatically added. Simply put, the Java EE Module dependencies is configured for Web APP libraries only.

The storage set for the jar package describes the JRE System library,referenced libraries,web App Libraries