Jakarta Server Pages 3.1
· This feature enables support for Jakarta Server Pages that are written to the Jakarta Server Pages 3.1 specification. This framework simplifies the construction of user interfaces. Enabling this feature also enables the Jakarta Expression Language version 5.0 feature.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window pages-3.1-23.0.0.8.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.