Java XML Tutorial

22 Comments

1. March 23, 2012 at 6:28 am

   Yajairo87 :

   When do we should DOM XML Parser and when do we should use SAX XML Parser? What do we need to evaluate in order to choose one?

   Thanks in advice

   Reply
2. March 8, 2012 at 6:31 am

   Darshan :

   I am facing problem in parsing the XML using DOM on Android application.

   I have data like “A & B” in XML tag. While parsing the XML, it only returns the “A” and ignoring everything after &. How to deal with this problem?

   Reply
3. February 29, 2012 at 2:31 pm

   mkyong reader :

   How can we convert any xml to Java object? looking for generalized solution?

   Reply
   • February 29, 2012 at 5:18 pm

     Satish :

     Using XMLBeans and JAXB.

     Reply
     • February 29, 2012 at 5:22 pm

       Satish :

       That JAXB can be used for static xml.

       We need to write our own parser Stax(XML Streaming parser) inorder to get the complex types first.

       Then pass the complex types one by one (for loop) to Stax parser again inorder to strike out simplexTypes.

       Then we can make use of jdom parser , which will give the XML segment for specific complex type.

       Then we can easily construct the java Object out of that segment.

       Reply
4. February 10, 2012 at 10:33 pm

   abdur :

   i want to modify the second record stored in the xml file but when i try to do this it also goes with the first record.obviously it have some solution please help me to find out the solution. my code is given bellow.

   import java.io.File;
   import java.io.FileWriter;
   import java.io.IOException;
   import java.net.URL;
   import org.jdom.Document;
   import org.jdom.Element;
   import org.jdom.JDOMException;
   import org.jdom.input.SAXBuilder;
   //import org.jdom.output.Format;
   import org.jdom.output.XMLOutputter;
    
   public class ModifyXMLFile {
   	public static void main(String[] args) {
    
   	  try {
    
   		SAXBuilder builder = new SAXBuilder();
                   URL FileUrl = null;
                   FileUrl = WriteXMLFile.class.getResource("../crypto");
                   String s=FileUrl.getPath();
                   System.out.println(s.substring(1));
   		File xmlFile = new File(s+"/file.xml");
    
   		Document doc = (Document) builder.build(xmlFile);
   		Element rootNode = doc.getRootElement();
    
   		// update staff id attribute
   		Element staff = rootNode.getChild("staff");
                   Element sta = rootNode.getChild("staff");
    
   		staff.getAttribute("id").setValue("3");
                   /*if(staff.getAttribute("id").getValue().equals("3")){
                     staff.getAttribute("id").setValue("5");
    
                   }*/
                   if(sta.getAttribute("id").getValue().equals("2")){
                     sta.getAttribute("id").setValue("5");
    
                   }
    
    
   		// add new age element
   		Element age = new Element("age").setText("32");
   		staff.addContent(age);
    
   		// update salary value
   		staff.getChild("salary").setText("11000");
    
   		// remove firstname element
   		staff.removeChild("firstname");
    
   		XMLOutputter xmlOutput = new XMLOutputter();
    
   		// display nice nice
   		//xmlOutput.setFormat(Format.getPrettyFormat());
   		xmlOutput.output(doc, new FileWriter(s+"/file.xml"));
    
   		// xmlOutput.output(doc, System.out);
    
   		System.out.println("File updated!");
   	  } catch (IOException io) {
   		System.out.println(io.getCause());//io.printStackTrace();
   	  } catch (JDOMException e) {
   		System.out.println(e.getCause());//e.printStackTrace();
   	  }
   	}
   }

   <?xml version="1.0" encoding="UTF-8"?>
   <company>
       <staff id="3">
           <lastname>mook kim</lastname>
           <nickname>mkyong</nickname>
           <salary>11000</salary>
           <age>32</age>
       <age>32</age></staff>
       <staff id="2">
           <firstname>low</firstname>
           <lastname>yin fong</lastname>
           <nickname>fong fong</nickname>
           <salary>188888</salary>
       </staff>
   </company>

   Reply
5. January 18, 2012 at 8:22 pm

   SATISH :

   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

   Reply
6. January 10, 2012 at 2:43 pm

   Ravi :

   Hi, There is not FTP example. It will help me a lot if you put something.

   Best Regards
   Ravi

   Reply
   • January 16, 2012 at 10:04 pm

     mkyong :

     Don’t get you, what XML to do with FTP?

     Reply
7. January 9, 2012 at 1:14 pm

   saikumar :

   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

   Reply
8. December 5, 2011 at 7:30 pm

   Shane P :

   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?

   Reply
   • December 6, 2011 at 7:25 am

     mkyong :

     You need it if you are using DOM to parse XML

     Reply
9. November 4, 2011 at 9:04 am

   Tutorials :

   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.

   Reply
   • November 4, 2011 at 12:47 pm

     mkyong :

     May i know what’s the problem in IE? Btw, IE is no longer leader position in web browser market.

     Reply
10. February 24, 2011 at 1:35 pm

    Mohammed Hossain Doula :

    There is not JAXB tutorial… Hopefully we will get that very soon…

    Reply
    • August 4, 2011 at 10:29 pm

      mkyong :

      JAXB example is added, a simple but complete example to convert object to / from XML via JAXB annotation.

      Reply
11. December 22, 2010 at 7:43 am

    Me :

    thx… this is how example and getting started should be… straight forward…good thx

    Reply
12. November 27, 2010 at 12:07 am

    Using XML :

    [...] sorts of things like data transfer, saving data, sending data, etc. Java API for XML Code Samples Java XML Tutorials Reply With [...]

    Reply
13. May 16, 2010 at 6:14 pm

    bill :

    hi,

    so you know how to convert xml file to strings using jdom?

    thanks

    Reply
    • May 18, 2010 at 1:35 pm

      mkyong :

      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.

      Reply
14. May 13, 2010 at 6:05 pm

    java PDF :

    How can I locate the Java cache, and is it safe to delete what is in it?

    Reply
    • May 18, 2010 at 1:33 pm

      mkyong :

      Java cache? What to do with XML?

      Reply