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Get xml value by element name

How can i get XML value by attribute for the below XML:
I have tried:
String xml = "<Info><document><document>234doc</document></document></Info>";
Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder()
.parse(new InputSource(new StringReader(xml)));
NodeList errNodes = doc.getElementsByTagName("error");
if (errNodes.getLength() > 0) {
Element err = (Element)errNodes.item(0);
} else {
Node value = doc.getElementsByTagName("document").item(0);
out.println(value);
}
I am looking for the output: "234doc". But I am not sure how do get the value. Can any one please suggest?

This is not a rocket science. You should debug your code, explore classes you might already know (Document, NodeList, Node, Element) and understand your xml structure (for more info look here). One way to achieve your result is:
System.out.println(doc.getChildNodes().item(0).getTextContent());

How to add nodes from another xml using xmlbeans

I am using xmlbeans to generate the xml document, while I need to extract all the children from another xml file and insert them to my current document.
The to_be_add.xml:
<root>
<style>
.....
</style>
<atlas img="styles/jmap.png">
....
</atlas>
.....
</root>
And this xml file does not have a schema so I do not create related java class to map it. You think it as a plain xml file.
I want the style atlas node added. I use the following codes:
XmlObject pointRoot = XmlObject.Factory.parse(Main.class.getResourceAsStream("to_be_added.xml"));
NodeList nodeList = pointRoot.getDomNode().getChildNodes();
Node themeNode = renderthemeDoc.getDomNode();
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
themeNode.appendChild(node);
}
Then I got error:
Exception in thread "main"
org.apache.xmlbeans.impl.store.DomImpl$WrongDocumentErr: Child to add
is from another document
And I found this post by searching "child to .... another document": how to add a xml document to another xml document in java which said that the connection between the element and the document has to be broken between the element can be add to other document.
So I try to build the Document object(that is why the variable pointDoc and themeDoc exist):
XmlObject pointRoot = XmlObject.Factory.parse(Main.class.getResourceAsStream("to_be_added.xml"));
Document pointDoc = pointRoot.getDomNode().getOwnerDocument();
System.out.println(pointDoc);
Element element = pointDoc.getDocumentElement();
NodeList nodeList = element.getChildNodes();
Document themeDoc = myCurrentDoc.getDomNode().getOwnerDocument();
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
node = themeDoc.importNode(node, true);
themeDoc.appendChild(node);
}
Then I got NullPointerException which said that the pointDoc is null.
That is the whole process how I try to solve this problem. If it is unclear, please tell me, I will update accordingly.
Is it possible to fix it?

Since your other XML file is not mapped to a class, you can use a regular DOM parser to read it and extract its nodes. But using a generic object factory you can still get the nodes:
XmlObject pointRoot = XmlObject.Factory.parse( "<root>\n" +
" <style>\n" +
" </style>\n" +
" <atlas img=\"styles/jmap.png\">\n" +
" </atlas>\n" +
"</root>");
Node pointDoc = pointRoot.getDomNode().getFirstChild();
NodeList nodeList = pointDoc.getChildNodes();
for(int i = 0; i < nodeList.getLength(); i++) {
System.out.println("Node: " + nodeList.item(i).getNodeName());
}
This will print:
Node: #text
Node: style
Node: #text
Node: atlas
Node: #text

Inserting a node in an xml file

I would like to insert a node in an xml file using Java DOM. I am actually editing a lot of contents of a dummy file in order to mofidy it like the original.
I would want to add an open node and close node in between the following file;
<?xml version="1.0" encoding="utf-8"?>
<Memory xmlns:xyz="http://www.w3.org/2001/XMLSchema-instance"
xmlns:abc="http://www.w3.org/2001/XMLSchema" Derivative="ABC"
xmlns="http://..">
///////////<Address> ///////////(which I would like to insert)
<Block ---------
--------
-------
/>
////////// </Address> /////////(which I would like to insert)
<Parameters Thread ="yyyy" />
</Memory>
I hereby request you to let me know how to I insert -- in between the xml file?
Thanks in advance.!
What I have tried doing is;
Element child = doc.createElement("Address");
child.appendChild(doc.createTextNode("Block"));
root.appendChild(child);
But this gives me an output like;
<Address> Block </Address> and not the way i expect :(
And now, what I have tried is to add these lines;
Element cd = doc.createElement("Address");
Node Block = root.getFirstChild().getNextSibling();
cd.appendChild(Block);
root.insertBefore(cd, root.getFirstChild());
But still, this is not the output which i am looking for. I got this output as
---------

What you want is probably:
Node parent = block.getParentNode()
Node blockRemoved = parent.removeChild(block);
// Create address
parent.appendChild(address);
address.appendChild(blockRemoved);
This is the standard way to re-attach a node in another place under W3C DOM.

Here:
DocumentBuilder b = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document document = b.parse(...);
// Parent of existing Block elements and new Address elemet
// Might be retrieved differently depending on
// actual structure
Element parent = document.getDocumentElement();
Element address = document.createElement("address");
NodeList nl = parent.getElementsByTagName("Block");
for (int i = 0; i < nl.getLength(); ++i) {
Element block = (Element) nl.item(i);
if (i == 0)
parent.insertBefore(address, block);
parent.removeChild(block);
address.appendChild(block);
}
// UPDATE: how to pretty print
LSSerializer serializer =
((DOMImplementationLS)document.getImplementation()).createLSSerializer();
serializer.getDomConfig().setParameter("format-pretty-print", Boolean.TRUE);
LSOutput output =
((DOMImplementationLS)document.getImplementation()).createLSOutput();
output.setByteStream(System.out);
serializer.write(document, output);

I assume you are using the W3C DOM (e.g. http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html ). If so try
insertBefore(address, block);

Error while reading text from Document in jdom?

I am here to ask you a basic question about jdom. I am trying to read a Document object but I got an error all the time.
The Document that I am trying to read is,
<message>
<header>
<messageType>snmp</messageType>
<sendFrom>192.168.0.16</sendFrom>
<hostName>oghmasysMehmet</hostName>
<sendTo>192.168.0.12</sendTo>
<receiverName>Mehmet</receiverName>
<date>03/10/2011</date>
</header>
<body>
<snmpType>getbulk</snmpType>
<ip>127.0.0.1</ip>
<port>161</port>
<oids>
<oid>1.3.6.1.2.1.1</oid>
</oids>
<community>public</community>
<nR>0</nR>
<mR>5</mR>
</body>
</message>
And I am trying to value. To do it, I have written a function,
public Vector<String> getOIDs(Document document){
Vector<String> oids = new Vector<String>();
Element root = document.getRootElement();
Element body = root.getChild("body");
//Element element = body.getChild("oids");
List rows = body.getChildren("oid");
for (int i = 0; i < rows.size(); i++) {
Element row = (Element) rows.get(i);
String s = row.getText();
oids.add(s);
}
return oids;
}
but When I debug it, I can always see that there is nothing read by the function.
Can you please help me about that ?
Thank you all
EDIT :Ok sorry for asking such a noob question, I just made a mistake in getchildren (); I should have written oids instead of oid
EDIT 2: Actually ı have changed the code as I commented on my question but now, the only thing I read is "\n \n" not "1.3.6.1.2.1.1". What do you think the problem might be ?

At first glance, seems to me that doesn't have a "oid" child, it has a "oids" child. The element you're trying to read is inside the "oids" element.
You can try and debug it step by step, and see what is the element that isn't being read. That would be my best guess without trying it out.

Your commented out line was correct, the line below it just needs to be updated to match. Your listing should be:
Vector<String> oids = new Vector<String>();
Element root = document.getRootElement();
Element body = root.getChild("body");
Element element = body.getChild("oids");
List rows = element.getChildren("oid");
for (int i = 0; i < rows.size(); i++) {
Element row = (Element) rows.get(i);
String s = row.getText();
oids.add(s);
}
return oids;

How to read an attribute tag with an equals sign from XML in Java?

I'm parsing an XML file through Java, and am able to parse through Nodes in the XML file that appear as:
<name><given>familyName</given></name>
by using code such as the snippet shown below:
NodeList givenElmntLst = firstElement.getElementsByTagName("given");
Element givenNmElmnt = (Element) givenElmntLst.item(0);
NodeList fstNm = givenNmElmnt.getChildNodes();
String given = ((Node) fstNm.item(0)).getNodeValue();
but I am unable to read attributes that are formatted as such:
<birthTime value="19230101"/>
How should I be reading values such as the one above differently? Thanks in advance.

i'm assuming your using the org.w3c.dom package...
try something like this:
NodeList birthTimeLst = firstElement.getElementsByTagName("birthTime");
Element birthTime = (Element) birthTimeLst.item(0);
String value = birthTime.getAttribute("value");