A file created with the Java jar tool bundles the files in a directory into a single Java ARchive (JAR) file, maintaining the directory structure. The Java classloader can search for Java class files (and other file types) in a JAR file the same way that it searches a directory in its classpath. Because the classloader can search a directory or a JAR file, you can deploy J2EE components on WebLogic Server in either an "exploded" directory or a JAR file.
JAR files are convenient for packaging components and applications for distribution. They are easier to copy, they use up fewer file handles than an exploded directory, and they can save disk space with file compression. If your Administration Server manages a domain with multiple WebLogic Servers, you can only deploy JAR files, because the Administration Console does not copy expanded directories to managed servers.
Use the Jar File > Configuration tab to configure the connector JAR file.
