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Here is my xml file
<?xml version="1.0" encoding="UTF-8"?>
<productlist>
<product>
<title>1</title>
<price>30</price>
</product>
<product>
<title>2</title>
<price>9</price>
</product>
<product>
<title>3</title>
</product>
</productlist>
What I need to do is use Java DOM API to print out all the contents from XML file which contain "price" tag. Such things like this
title:1
price:30
title:2
price:9
In the org.w3c.dom documentation I only find hasAttribute(String name) method to check if this element have attribute but I can not find method like "hasTag(String name)" in documentation. I find this website http://www.java-forums.org/xml/62136-check-whether-xml-tag-exists-while-parsing-xml-using-dom-java.html but unfortunately I can not open the site. Hope you can help.
713
You can iterate through each and every node and see if a node exists. doc. Load(xmlPath); XmlNodeList node = doc. SelectNodes("//Nodes/Node"); foreach (XmlNode chNode in node) { try{ if (chNode["innerNode"]==null) return true; //node exists //if ...
Use the fn:nilled XPath function to test whether the value of an input element has the xsi:nil attribute set. Use the fn:exists XPath function to test whether the value of an input element is present. Note: An XML element that has the xsi:nil attribute set is considered to be present.
According to the XML DOM, everything in an XML document is a node: The entire document is a document node. Every XML element is an element node. The text in the XML elements are text nodes.
Just call getElementsByTagName and see if the returned list has any nodes (using NodeList.getLength()).
81
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