Updating multiple elements in XML Document with same value

[tommyc7]

I need some help using the Java XML APIs.

Suppose I have an org.w3c.dom.Document containing an XML that is similar to:

<XML>
  <outer>
    <type>A</type>
    <inner>123</inner>
  </outer>
  <outer>
    <type>B</type>
    <inner>123</inner>
  </outer>
  <outer>
    <type>C</type>
    <inner>123</inner>
  </outer>
</XML>

What is the easiest and "best" way to change all of the <inner> values from 123 to 321 (regardless of <type>)?

 

[tsuji]

[1] Suppose you have set up and got the org.w3c.dom.Document, say doc, ready to go, you can sure use the getElementsByTagName() method to do this.
[tt]
NodeList onl = doc.getElementsByTagName("inner");
int nnl = onl.getLength();
for (int i=0; i<onl.getLength(); i++){
Node onode = onl.item(i);
onode.getFirstChild().setNodeValue((new StringBuffer(onode.getFirstChild().getNodeValue())).reverse().toString());
}
[/tt]
[2] After that, if you need to persist the change and save it to a file, maybe, you have to appeal to deprecated, but still working well, org.apache.xml.serialize.XMLSerializer to do the job.