XPath

[Ananth Ram]

I am newbie to XPath. I have the below file, to parse and retrieve the <jar> under <test> only and ignore <jar> under <subcomponent>. I am using XPath for the same.

<xml>
<test name="1">
<jar>3</jar>
<jar>4</jar>
<subcomponent name="1">
   <jar>5</jar>
</subcomponent>
</test>
<test name="2">
<jar>8</jar>
<jar>9</jar>
<subcomponent name="2">
   <jar>11</jar>
</subcomponent>
</test>
</xml>

The code,

            DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
            domFactory.setNamespaceAware(true);
            DocumentBuilder builder = domFactory.newDocumentBuilder();
            Document doc = builder.parse("test.xml");
            XPathFactory factory = XPathFactory.newInstance();
            XPath xpath = factory.newXPath();
            XPathExpression expr = xpath.compile("//test//jar");
            Object result = expr.evaluate(doc, XPathConstants.NODESET);
            NodeList nodes = (NodeList) result;
            for (int i = 0; i < nodes.getLength(); i++) {
                System.out.println(nodes.item(i).getNodeValue());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

When I retrieve, I am not getting the value. Please someone help me.

Thanks,
Ananth

[Paul Clapham]

Ananth Ram wrote:I am newbie to XPath. I have the below file, to parse and retrieve the <jar> under <test> only and ignore <jar> under <subcomponent>. I am using XPath for the same.

In that case you might want to consider finding out the difference between the "/" and "//" operators in XPath.

When I retrieve, I am not getting the value. Please someone help me.

Could you provide a description of the problem? "Not getting the value" doesn't mean anything when the first line of your post says you are expecting more than one value. So, tell us what you see, what you expected to see, and what the difference is.

[Ananth Ram]

Thanks, I tried both "\\" and "\". When I print on the console, I get to see only null.
But the iterations exactly match the <jar> under <test> only. But, how do I retrieve the value say 3, 4 or 8, 9.

Thanks,
Ananth

[Paul Clapham]

Ananth Ram wrote:Thanks, I tried both "\\" and "\".

Perhaps that's the problem. The backslash doesn't mean anything in XPath. You need slashes.

When I print on the console, I get to see only null.

Just the four characters "n" "u" "l" "l"?

[Ananth Ram]

Yes, the four characters.

null.

Thanks, I am going over the XPath Expressions.
The expressions were not correct.

Able to retrieve the values from the same.