With the release of JDOMTM we’ve opted to remove the extensive links to articles and slides that cover the older A set of JDOM tutorials by StudyTrails. View more Tutorials: Java API for HTML & XML · Java Open source libraries. JDOM, Java XML parser, is more user friendly in the way of accessing . If you like my tutorials, consider make a donation to these charities.
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The DOM parsing method, also known as DOM, is the reference implementation of the W3C parser and the first implementation with this kind of processing for Java, but it’s not the only one, and it’s not the best one. That’s the reason why other parsers were implemented using this kind of parsing method.
When I was searching for other parsers, I found some information about them in different forums. That was several tutoriaal ago, and I cannot remember which forums they were, otherwise I would have posted the links here.
At that time, I was also collaborating with another development shop that was using the JDOM parser too, so maybe that influenced my decision too.
Doing this, I noticed differences in the syntax of the parsers, which was one of the reasons why I rewrote the code. One term that I want to mention here, which can be found in many tutorials, is the client class. The Java-class where the XML parsers are used is called the client class. This term is also used when using other kinds of processing libraries like the JSON parsers or other factory pattern like builder.
For creation of the source code I have used Eclipse 4.
Read XML in Java using JDom Parser
As you can see the DOM needs one more coding step for this operation. In the following example you can see the differences in the syntax of the parsers for this case.
Somethimes the XML files are using explicit defined namespace or many namspaces at once. If you have this kind of case that you need to use the methods where the namespace is needed as parameter. If you don’t do this you will get empty data without any warning and confusion of the programmer is inevitable. As return value a list of XML nodes will be expected.
Somethimes we need to restructure or filter given XML files. At the jdo, the processing we need to send our new document for further processing or persistence out of the client class. How you can do this is shown in the following code:. Writing this article, creating the code for it and doing the tests I have also learned new stuff about the parsers: I have also searched links about performance comparison but haven’t found any good one. As you can see the JDOM2 syntax is shorter for using the same functionality.
If you have projects which are already using DOM then there is no need to tutorizl them only because of the syntax. At last but not least you should aleays keep an eye on the slogan: The sources for this example can be checked out from: Use the java-and-xml folder and start the test method of the TestJavaXml.
Java XML – JDOM2 – Introduction – StudyTrails
Over a million developers have joined DZone. Join the DZone community and get the full member experience. Follownig Exceptions have to be catched: How tjtorial can do this is shown in the following code: JDOM2 has shorter syntax. Iterating trough the nodes can be also implemented recursively by both libraries.
Read XML in Java using JDom Parser – Memorynotfound
Different techniques for handling the namespaces as mentioned above. GitHub The sources for this example can be checked out from: Opinions expressed by DZone contributors are their own.
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