Use jpackage to create an installer for Java application (which uses Maven)

package.sh

# Java Package Example (jpex) project directory
# jpackage_example
# + src
#   + main
#     + java
#        Main (This is the main class file for this example)
# + test
# // After a mvn package the target folder is available
# + target
# pom.xml

# From the project directory clean and build the jar files
mvn clean package

# Use jpackage to build the rpm installer
# input - target folder
# name - the name of the main executable
# main-jar the main jar file inside the input folder
# main-class if no manifest is created you should specify the main class as well
# There is a lot of options -> See the documentation, but below is sufficient
jpackage --input target --name jpex --main-jar jpex01.jar --main-class Main

# IMPORTANT - rpm-build is a pre-requisite to build a rpm package thus install it if you have not
sudo yum install rpm-build

# Once the rpm package is created you can install it as follows [ -i | --install ]
sudo rpm -i jpex-1.0-1.x86_64.rpm

# Uninstall is also quite easy [ -e | --erase ]
sudo rpm -e jpex-1.0-1.x86_64.rpm

# RPM packages also have pre- and post- install scripts which you can use to configure the program
# ...

# If you create a symlink as follows after installation:
sudo ln -s /opt/jpex/bin/jpex /usr/local/bin/jpex

# Then startup is as easy as 
jpex

# And shutdown
pkill jpex