Solved

Using an XML document

Posted on 2007-11-28
10
219 Views
Last Modified: 2010-03-30
Hi,

I have some code that builds an XML document object, looks like:

    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setValidating(validating);

    // Create the builder and parse the file
    Document doc = factory.newDocumentBuilder().parse(new File(filename));
    return doc;


It works fine. I made a dummy XML document that looks like:

    <xml>
        <a>a
            <a0>a0</a0>
            <a1>a1</a1>
            <a2>a2</a2>
        </a>
        <b>b
            <b0>b0</b0>
            <b1>b1</b1>
        </b>
    </xml>

Now how do I traverse the nodes of the document using the created 'doc' object? I want to be able to hit all the nodes in the document. Something like:

       System.out.println("Here's a node value: " + doc.xml.a.a1);

Thanks
0
Comment
Question by:DJ_AM_Juicebox
10 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 20368478
0
 
LVL 1

Expert Comment

by:arunyeshi2000
ID: 20368490
You can do something like this..

printNodes(doc.getElementsByTagName("xml"));

//Recursive function
printNodes(NodeList nodelist){
    //Get the root Node
    NodeList nodelist = doc.getElementsByTagName(nodelist.item(0));
 
    //Loop thru and print the node values.
    for(int i=o;i<nodelist.getLength();i++){
    System.out.println(nodelist.item(i));
    printNodes(nodelist)
}

0
 
LVL 9

Expert Comment

by:ysnky
ID: 20368718
0
ScreenConnect 6.0 Free Trial

Explore all the enhancements in one game-changing release, ScreenConnect 6.0, based on partner feedback. New features include a redesigned UI, app configurations and chat acknowledgement to improve customer engagement!

 

Author Comment

by:DJ_AM_Juicebox
ID: 20371108
Hi,

The only thing I don't get is how to get the text value and only the text value of the node. For example I have:

    <weight>50</weight>

and am eventually using the code:

    Node childNode = list.item(i);
    System.out.println(childNode);

how do I extract only the text element of it?

thanks
0
 
LVL 92

Expert Comment

by:objects
ID: 20371253
Once you have your text node use:

    Text textNode = (Text) node;
    String text = textNode.getData();
0
 

Author Comment

by:DJ_AM_Juicebox
ID: 20371286
ok but if the particular node doesn't have text associated with it, how can I check that (right now I'm getting an exception). I need something like:

if (node.HasText()) {
    // do stuff you listed
}

Thanks
0
 
LVL 92

Expert Comment

by:objects
ID: 20371299
if (node instanceof TextNode)
{
0
 

Author Comment

by:DJ_AM_Juicebox
ID: 20371324
where is TextNode defined, what do I need to import to use it? Compiler saying it's undefined,

Thanks
0
 
LVL 92

Accepted Solution

by:
objects earned 500 total points
ID: 20371353
sorry, typo should have been:

if (node instanceof Text)
{
0
 

Author Comment

by:DJ_AM_Juicebox
ID: 20371358
thanks
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to get all the API from website? 11 90
allswap challenge 6 99
Groovy problem when using SOAPUI : DispatchException occurred 7 45
Java exception bubble up 2 18
INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question