Java XML Tutorial
In Java JDK, two built-in XML parsers are available – DOM and SAX, both have their pros and cons. Here’s few examples to show how to create, modify and read a XML file with Java DOM, SAX, JDOM.
In addition, updated JAXB example to show you how to convert object to / from XML.
DOM XML Parser
The DOM is the easiest to use Java XML Parser. It parses an entire XML document and load it into memory, modeling it with Object for easy nodel traversal. DOM Parser is slow and consume a lot memory if it load a XML document which contains a lot of data.
- Read a XML file
Read a XML file and print it out each elements. - Modify existing XML file
Modify an existing XML file, by update the element and attribute, and also how to delete a element. - Create a new XML file
Create a XML file with new document, element and attribute. - Count XML Elements
Search and count total number of elements in a XML file.
SAX XML Parser
SAX parser is work differently with DOM parser, it does not load any XML document into memory and create some object representation of the XML document. Instead, the SAX parser use callback function (org.xml.sax.helpers.DefaultHandler) to informs clients of the XML document structure.
- Read a XML file
Read a XML file via SAX callback methods. - Read a UTF-8 XML file
Read a Unicode XML file via SAX callback methods. - SAX Error – Invalid byte 1 of 1-byte UTF-8 sequence
Common SAX error for XML file which contains Unicode character. - SAX Error – Content is not allowed in prolog
Common SAX error for invalid XML file content.
SAX Parser is faster and uses less memory than DOM parser.
JDOM XML Parser
JDOM provides a way to represent that document for easy and efficient reading, manipulation, and writing. It’s an alternative to DOM and SAX.
- Read a XML file
Read a XML file and print it out each elements. - Modify existing XML file
Modify an existing XML file, by update the element and attribute, and also how to delete a element. - Create a new XML file
Create a XML file with new document, element and attribute.
JAXB Example
JAXB, using annotation to convert Java object to / from XML file.
- JAXB 2.0 hello world example
A detail example to show you use JAXB to do XML Marshalling (convert object to XML) and XML Unmarshalling (Convert XML to object).
XML & Properties
The java.util.Properties class has build-in functionality to convert properties file into XML file or vice versse.
References
- Wiki Java_API_for_XML_Processing
- DOM XML parser documentation
- JDOM XML parser
- SAX useful quick start example
- SAX XML parser documentation
- JAXB Official Website
- Properties documentation
- Processing XML with Java
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Hi Mkyong,
I need to convert any xml file (having complex types) in to multiple csv files with proper mappings.
I could see lots of utilities available in .net and c#.I am using one .net utility to convert an xml in to multiple csv files.But obviously there is a restriction that we can’t use this .net library on linux platform.
Can u please provide me any java utility (which is purely built in java) , which does the same operation.
Or do you have any algorithm with you so that i can implement in java?
Your help is highly appreciated , and i am constant learner of your tutorials.
Thanks,
Satish
Hi, There is not FTP example. It will help me a lot if you put something.
Best Regards
Ravi
Don’t get you, what XML to do with FTP?
hi frnd,
i have a problem with xml i.e i want to get the data from xml in the form of java objects and send those java objects into the database….can you please help me …thanks
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.*;
I think these 4 imports are necessary when reading from XML, I got errors without these imports? Any other solutions?
You need it if you are using DOM to parse XML
Hello, Neat post. There’s an issue together with your web site in web explorer, may check this? IE still is the marketplace leader and a good part of folks will leave out your great writing due to this problem.
May i know what’s the problem in IE? Btw, IE is no longer leader position in web browser market.
There is not JAXB tutorial… Hopefully we will get that very soon…
JAXB example is added, a simple but complete example to convert object to / from XML via JAXB annotation.
thx… this is how example and getting started should be… straight forward…good thx
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hi,
so you know how to convert xml file to strings using jdom?
thanks
use jdom to read the xml file and constructs any string format you want, is this what you want? Just see the above JDOM XML Parser example.
How can I locate the Java cache, and is it safe to delete what is in it?
Java cache? What to do with XML?