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How to get the node names under one parent node of XML in java

I have a situation where I need to get the node names of one XML file in java.
Here I want to get all the node names under "ns0:header"
sample XML file.
<SOAP-ENV:Envelope xmlns:SOAP-ENV="efefefff">
<SOAP-ENV:Body>
<ns0:response_card_posted_transactions xmlns:ns0="fefefefeeff">
<ns0:header>
<ns0:version>1.0</ns0:version>
<ns0:msg_id>78956285</ns0:msg_id>
<ns0:msg_type>CCPT</ns0:msg_type>
<ns0:msg_function>REP_CARD_POSTED_TRANSACTIONS</ns0:msg_function>
<ns0:src_application>Src_APP</ns0:src_application>
<ns0:target_application>CPS</ns0:target_application>
<ns0:timestamp>01/06/2020 18:09:54</ns0:timestamp>
<ns0:tracking_id>8032695</ns0:tracking_id>
<ns0:bank_id>RICHBANK</ns0:bank_id>
</ns0:header>
</ns0:response_card_posted_transactions>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
I was trying getchildnodes() method but unable to find that.
Thanks
Nihar

As you haven't share your code, it is nearly impossible for me to understand the issue in your code. Here I'm sharing a simple code to parse the child node.
Steps:
First you need to go to the <ns0:header> node.
Then, try to get all the child nodes of that parent node.
Code:
public static void main(String[] args) throws Exception
{
String xml = "<SOAP-ENV:Envelope xmlns:SOAP-ENV=\"efefefff\"> <SOAP-ENV:Body> <ns0:response_card_posted_transactions xmlns:ns0=\"fefefefeeff\"> <ns0:header> <ns0:version>1.0</ns0:version> <ns0:msg_id>78956285</ns0:msg_id> <ns0:msg_type>CCPT</ns0:msg_type> <ns0:msg_function>REP_CARD_POSTED_TRANSACTIONS</ns0:msg_function> <ns0:src_application>Src_APP</ns0:src_application> <ns0:target_application>CPS</ns0:target_application> <ns0:timestamp>01/06/2020 18:09:54</ns0:timestamp> <ns0:tracking_id>8032695</ns0:tracking_id> <ns0:bank_id>RICHBANK</ns0:bank_id> </ns0:header> </ns0:response_card_posted_transactions> </SOAP-ENV:Body> </SOAP-ENV:Envelope>";
Document doc =
DocumentBuilderFactory
.newInstance()
.newDocumentBuilder()
.parse(new InputSource(new StringReader(xml)));
Node nl = doc.getElementsByTagName("ns0:header").item(0);
NodeList headerChildNodes = nl.getChildNodes();
for (int i = 0; i < headerChildNodes.getLength(); i++)
{
if (headerChildNodes.item(i) instanceof Element)
System.out.println("Node is : "+headerChildNodes.item(i).getNodeName());
}
}
Note: To get the child node text content simply use
System.out.println("Node is : "+headerChildNodes.item(i).getTextContent());
Output:
Node:
Text Content:

How to insert new node at specific position in XML?

I Have XML with this structure:
<ms:tech ID="TM_002">
<ms:wrap MDTYPE="NISOIMG" MIMETYPE="text/xml">
<ms:xmlData>
<ml:ml>
<mx:BasicInformation>
<mx:ObjectIdentifier>
<mx:objectIdentifierType>Value</mix:objectIdentifierType>
</mx:ObjectIdentifier>
**-----HERE AT THIS POSITION INSERT NEW XML TAG------**
<mx:byteOrder>Value2</mx:byteOrder>
<mx:Compression>
<mx:compressionScheme>Uncompressed</mx:compressionScheme>
</mx:Compression>
</mx:BasicInformation>
</ml:ml>
<ms:xmlData>
</ms:wrap>
</ms:tech>
I want to insert new XML tag at specific position in XML tree. My code so far looks like this:
String xp = "//ms:tech[#ID='TM_002']/ms:wrap/ms:xmlData/ml:ml/mx:BasicInformation";
List<Node> list = amdDocument.selectNodes(xp);
Node element = list.get(0);
By this I got the tag, and in this tag I want insert new one after . Im using dom4j. How can I do this? Thanks.

Remove empty namespace in java using DOM

<Request>
<EMPId>?</EMPId>
</Request>
I know this is a repeated question, but i would like to post it again as i dint get a convincing answer from any of the threads i went through.
My ultimate aim is to add the XML given above as the Body content of a SOAP message.
You can have a look at the following link to see how i am doing it.
Namespace related error on creating SOAP Request
It worked fine when i was using the Websphere Application Server 7.0 library.JRE is also present, forgot to include in screen shot.
Since i have to export it as a jar and run it as a stand alone application, i have to remove the dependency of 'Websphere Application Server 7.0 library'. Because, by keeping this library, my jar size will go above 100MB. So i thought of taking only the library which i needed.
'com.ibm.ws.prereq.soap.jar'
Now the issue is, the Request tag of the generated SOAP request is coming in following format.
<Request xmlns="">
<EMPId>?</EMPId>
</Request>
I am able to create a 'org.w3c.dom.Document' representation for the generated SOAP message.
Now, can any one tell me how can I delete the xmlns="" from Request tag.

The simplest way what i found is:
first:
in child set nasmespace as in root:
second:
remove namespace
Document doc = new Document();
Namespace xmlns = Namespace.getNamespace("http://www.microsoft.com/networking/WLAN/profile/v1");
Element rootXML = new Element("WLANProfile", xmlns);
Element nameXML = new Element("name");
nameXML.addContent(name);
rootXML.addContent(nameXML);
//below solution
nameXML.setNamespace(xmlns);
nameXML.removeNamespaceDeclaration(xmlns);

Finally I found several solutions of the described problem.
First, you can remove all namespaces from all xml using this answer.
Second, if you do not need to remove all namespaces in Xml, but only empty ones, they arise due to the fact that some namespace is written in the root elements, which is not in the child. For example:
<ЭДПФР xmlns="http://пф.рф/КСАФ/2018-04-03"
xmlns:АФ4="xx"...>
<КСАФ xmlns="">
...
</КСАФ>
So you need to set the same namespace for all children of root elements. It can be done using this code (call setTheSameNamespaceForChildren(rootElement) for root element before saving):
private static final String namespaceKey = "xmlns";
private static String namespaceValue;
public static void setTheSameNamespaceForChildren(Element rootEl) {
namespaceValue = rootEl.getAttribute(namespaceKey);
NodeList list = rootEl.getChildNodes();
for (int i = 0; i < list.getLength(); i++) {
Node child = list.item(i);
setTheSameNamespaceRecursively(child);
}
}
private static void setTheSameNamespaceRecursively(Node node) {
if (node.getNodeType() == Node.ELEMENT_NODE) {
boolean isChanged = setTheSameNamespace((Element) node);
if (isChanged) {
NodeList list = node.getChildNodes();
for (int i = 0; i < list.getLength(); i++) {
Node child = list.item(i);
setTheSameNamespaceRecursively(child);
}
}
}
}
private static boolean setTheSameNamespace(Element node) {
String curValue = node.getAttribute(namespaceKey);
if (curValue.length() == 0) {
node.setAttribute(namespaceKey, namespaceValue);
return true;
}
return false;
}

parsing xml in java- multiple child elements

I want to parse xml elemets using java.I m succeeded in some part...But not sure how to do rest..I have xml as,
<MainTag>
<userid>user1</userid>
<country>US</country>
<city>LA</city>
<phone>
<number>1111111111</number>
</phone>
<phone>
<number>222222222</number>
</phone>
</MainTag>
<MainTag>
<userid>user2</userid>
<country>Aus</country>
<city>MB</city>
<phone>
<number>23233</number>
</phone>
<phone>
<number>8787822</number>
</phone>
<phone>
<number>10101</number>
</phone>
I am able to parse xml elements such as country,city etc as below.
public void endelement()
{
if (someText.equalsIgnoreCase("country"))
{
pojo.setCountry(Val);
}
else if(someText.equalsIgnoreCase("city"))
{
pojo.setCity(Val);
}
}
public void stratelement()
{
............
}
But in case of phone how I can parse it ? since one user has multiple phone nos.
I want to find multiple phone nos for particular user.
for e.g. in above xml
for user1 there are two phone nos.
for user2 there are three phone nos.
Can anybody help in this ? Thanks in advance.

I would recommend using JAXB, since it appears you are attempting to bind your xml to a POJO.
Looking at the code you have written here (and assuming that the example xml you have provided is a snippet of well formed xml), I am guess that your pojo object should have a member for phone numbers that is of type List<String>, and your pojo should have a method that allows you to add a phone number to the List (perhaps addPhoneNumber(String phoneNumber) {...})

First, that is not a well-formed XML (as it has two root elements) and you can't parse it with any parser API unless it is well-formed. Now, to parse the XML you would normally use the APIs meant for it like SAX, DOM or StAX or even better the JAXB binding API.
Since you seem to be new to this, I suggest you start learning JAXP. Use StAX instead of DOM or SAX.

you can use DocumetBuilderFactory java default class if you know the incoming xml format for example how many node it has and the names it is very simple look at this code ;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
try {
//documentBuilder instance
DocumentBuilder db = dbf.newDocumentBuilder();
Document dom = db.parse("employees.xml");
}catch(ParserConfigurationException pce) {
pce.printStackTrace();
}catch(SAXException se) {
se.printStackTrace();
}catch(IOException ioe) {
ioe.printStackTrace();
}
//and than get root element
Element de= dom.getDocumentElement();
//get the nodelist of main element
NodeList nl = de.getElementsByTagName("Employee");
if(nl != null && nl.getLength() > 0) {
for(int i = 0 ; i < nl.getLength();i++) {
//get the employee element
Element el = (Element)nl.item(i);
}
}
//and then get data
private void getEmployee(Element el) {
//for each <employee> element get values
String name = getTextValue(el,"Name");
int id = getIntValue(el,"Id");
int age = getIntValue(el,"Age");
//get any element attribute
//String type = el.getAttribute("type");
}
thats all

Java - parse xml string with variable tagnames?

I'm trying to parse an XML string, and the tagnames are variable; I haven't seen any examples on how to pull the information out without knowing them. For example, I will always know the <response> and <data> tags below, but what falls inside/outside of them could be anything from <employee> to you name it.
<?xml version="1.0" encoding="UTF-8"?>
<response>
<generic>
....
</generic>
<data>
<employee>
<name>Seagull</name>
<id>3674</id>
<age>34</age>
</employee>
<employee>
<name>Robin</name>
<id>3675</id>
<age>25</age>
</employee>
</data>
</response>

You could parse it into a generic dom object and traverse it. For example, you could use dom4j to do this.
From the dom4j quick start guide:
public void treeWalk(Document document) {
treeWalk( document.getRootElement() );
}
public void treeWalk(Element element) {
for ( int i = 0, size = element.nodeCount(); i < size; i++ ) {
Node node = element.node(i);
if ( node instanceof Element ) {
treeWalk( (Element) node );
}
else {
// do something....
}
}
}
public Document parse(URL url) throws DocumentException {
SAXReader reader = new SAXReader();
Document document = reader.read(url);
return document;
}

I have seen similar situation in the projects.
If you are going to deal with large XMLs, you can use Stax or Sax parser to read the XML. On every step (like on reaching end element), enter the data into a Map or a dta structure of your choice, where you keep tag names as the key and value as value in the Map. Finally once you have the parsing done, use this Map to figure out which object to build as finally you would have a proper entity representation of the information in the XML
If XML is small,use DOM and directly build the entity object by reading the specific tag (like employee> or use XPATh to where you expect the tag to be present, giving you hint of the entity. Build that object directly by reading the specific information from the XML.