About Eclipse. classpath files:
<classpathentry exported= "true" kind= "con" path= "Org.eclipse.jdt.launching.JRE_CONTAINER"/>
Each new Java Project (project) exists by default.
<classpathentry kind= "src" output= "km230/apitest/classes" path= "Km230/apitest/src"/>
Specifies the source file location, corresponding to the project properties in the source item in Java Build path, kind= "src" as the source file, the source file path, and output path to the class file after compiling the source file in this path.
<classpathentry kind= "src" path= "km230batch/src"/>
Specifies the source file location, corresponding to the project properties in the source item in Java Build path, kind= "src" as the source file, the path to the source file, and the output path of the class file after compiling the default output path.
<classpathentry kind= "Output" path= "Km230server/approot/web-inf/classes"/>
Specifies the default output path for the class file after compiling, corresponding to the default output path in the source item in Java build path in the project properties, kind= "Output" as the defaults for the class output path, and path to the corresponding output path.
Note: This one is available in the file and can only be one (two defaults cannot be present at the same time).
<classpathentry kind= "Lib" path= "Km230/lib/notes.jar"/>
Specifies the library file or directory used for the project, one of the items in the libraries item in the Java build path of the engineering attribute, kind= "Lib" as the library file or directory, and path is the library file or directory location.
Note: When you specify a library file (a non-library directory, usually a jar package, as if it were a zip, you don't know if there are any), you should include the file name.
<classpathentry kind= "var" path= "Junit_home/junit.jar" sourcepath= "Eclipse_home/plugins/org.eclipse.jdt.source" _3.0.0/src/org.junit_3.8.1/junitsrc.zip "/>
Specifies the library file or directory used by the project, corresponding to an entry in the libraries item in the project Properties Java build Path, kind= "var" to indicate a variable with the settings set in the global compilation path (window->prefrences->java- >build Path->classpath Variables), as above Eclipse_home, Path is the library file under this variable directory (it is also usually a jar package, like a zip, and I don't know if there are other).