We have a simple project that connects to the db with JDBC (MySQL).
The only dependencies are JDBC driver for MySQL and the log4j for logging.
In the project built with plain java we can note that
- The depndencies are .jar files in the folder "lib"
- In order to include them as dependencies, if we run through:
1. IDE eclipse, Project > Properties > Java Build Path > Add Jars > Select the dependencies
2. command line, add the dependencies and the main application as jar in the -cp (classpath)
argument, which is a VM (Java) argument. Then indicate the path of the Main file of exec.
(i.e. it.generali.app.Main). See The file avvio.bat, for sample command line script.
2.a) For creating a jar file of the Main application, right click (in eclipse) on the file
then > export > (typically we select in the "dist" folder)
2.b) We have VM arguments, Program Arguments (and maybe also environment arguments). In the
command line, VM arguments are put before the path of the program (it.gener.app.main), while
the program arguments are put after. The firsts can be accessed through System.getProperty.
While the others are accessed through main(String[] args)
The Project built with maven has a pom.xml. Compare the dependencies.
- It will produce a jar file in the target folder.
- Run with "java -jar -DappProperties="..." target\file.jar"
Other small notes:
- The pom.xml, in <build> </build>, also needs to specify where the main class is
- If we want to build the maven project with Eclipse:
Add in goals "clean package"