As we know when we develop java, some special jar should be stepped into to investigate logical inside jar.
say there are 10 jar files has 10 zip file for source.
there is a better way to use eclipse UI. Here is inside .classpath file.
<classpathentry kind="lib" path="D:/dev/oltu/oauth-2.0/authzserver/target/org.apache.oltu.oauth2.authzserver-1.0.3-SNAPSHOT.jar" sourcepath="D:/dev/oltu/oauth-2.0/authzserver/src/main/java/org.zip"/>