Run a jar file in command line

This is a very simple and short post on running a jar file in command line.
Simplest command that you can try is
java –jar [jarFileName].jar

But you may need to have the MANIFEST file in the jar to run it simply with the above command.

So how to bundle MANIFEST.MF to your jar?

You can add the following maven plugin to your pom.xml and get it done. Remember to add the main class name of your app here.

How to run the jars with external dependencies?

If you need to use the simple command java –jar [jarFileName].jar to run your application which has external dependencies, you can bundle the dependencies you need to the executable jar itself. Again use the below maven plugin to get it done.

The highlighted part is doing this for you and the part above is to bundle MANIFEST.MF file to that jar file too.

Convert XML String to OMElement and extract values

A simple tip which saves a lot of your time...
You can simply convert XML string to an OMElement as below

      OMElement resultElement = AXIOMUtil.stringToOM(xmlString);

Extracting values from XML

Sample XML code

        Gambardella, Matthew
        
        Computer
        44.95
        2000-10-01
        An in-depth look at creating applicationswith XML.
    
    
        Ralls, Kim
        
        Fantasy
        5.95
        2000-12-16
        A former architect battles corporate zombies,an evil sorceress.
    
    
        Corets, Eva
        
        Fantasy
        5.95
        2000-11-17
        After the collapse of a nanotechnologysociety in England.
    
    
        Corets, Eva
        
        Fantasy
        5.95
        2001-03-10
        In post-apocalypse England, the mysteriousagent known only as Oberon.
    

Java code to retrieve values

OMElement resultElement = AXIOMUtil.stringToOM(xmlString);

        Iterator i = resultElement.getChildren();
        while (i.hasNext()) {
            OMElement book = (OMElement) i.next();
            Iterator properties = book.getChildren();
            System.out.println("====== book =======");
            while (properties.hasNext()) {
                OMElement property = (OMElement) properties.next();
                String localName = property.getLocalName();
                String value = property.getText();
                System.out.println(localName + ": " + value);
            }
        }

Result

====== book =======
author: Gambardella, Matthew
title: XML Developer's Guide
genre: Computer
price: 44.95
publish_date: 2000-10-01
description: An in-depth look at creating applicationswith XML.
====== book =======
author: Ralls, Kim
title: Midnight Rain
genre: Fantasy
price: 5.95
publish_date: 2000-12-16
description: A former architect battles corporate zombies,an evil sorceress.
====== book =======
author: Corets, Eva
title: Maeve Ascendant
genre: Fantasy
price: 5.95
publish_date: 2000-11-17
description: After the collapse of a nanotechnologysociety in England.
====== book =======
author: Corets, Eva
title: Oberon's Legacy
genre: Fantasy
price: 5.95
publish_date: 2001-03-10
description: In post-apocalypse England, the mysteriousagent known only as Oberon.