How can I insert element into xml after/before certain element in java
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Solution 1
Here an example I just tested using the xml sample you provided.
DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
domFactory.setIgnoringComments(true);
DocumentBuilder builder = domFactory.newDocumentBuilder();
Document doc = builder.parse(new File("XmlTest.xml"));
NodeList nodes = doc.getElementsByTagName("CustomerId");
Text a = doc.createTextNode("value");
Element p = doc.createElement("newNode");
p.appendChild(a);
nodes.item(0).getParentNode().insertBefore(p, nodes.item(0));
Here is the result:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<Customer>
<names>
<firstName>fName</firstName>
<lastName>lName</lastName>
<middleName>nName</middleName>
<nickName/>
</names>
<addressList>
<address>
<streetInfo>
<houseNumber>22</houseNumber>
<baseName>Street base name</baseName>
<district>kewl district</district>
</streetInfo>
<zipcode>22231</zipcode>
<state>xxx</state>
<country>xxxz</country>
<primary>true</primary>
</address>
</addressList>
<newNode>value</newNode>
<CustomerId/>
<SSN>561381</SSN>
<phone>
<homePhone>123123123</homePhone>
<officePhone/>
<homePhone>21319414</homePhone>
</phone>
<preferred>true</preferred>
</Customer>
If you're interested, here's the sample code I used to show the result:
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
StreamResult result = new StreamResult(new StringWriter());
DOMSource source = new DOMSource(doc);
transformer.transform(source, result);
String xmlOutput = result.getWriter().toString();
System.out.println(xmlOutput);
Solution 2
I think you want to insert into the parent, not the child:
nodes.item(i).getParentNode().insertBefore(p, nodes.item(i));
Comments
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ant almost 2 years
Here is my code, maybe you will notice right away what I'm missing :
DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = domFactory.newDocumentBuilder(); Document doc = builder.parse(fileName)); XPathFactory factory = XPathFactory.newInstance(); XPath xpath = factory.newXPath(); XPathExpression expr = xpath.compile("//CustomerId"); Object result = expr.evaluate(doc, XPathConstants.NODESET); Nodelist nodes = (NodeList) result; Text a = doc.createTextNode("value"); Element p = doc.createElement("newNode"); p.appendChild(a); for (int i = 0; i < nodes.getLength(); i++) { nodes.item(i).insertBefore(p, nodes.item(i)); }
I'm trying to insert new node(
<newNode>value</newNode>
) before CustomerId existing node. Here is my XML sample file :<Customer> <names> <firstName>fName</firstName> <lastName>lName</lastName> <middleName>nName</middleName> <nickName/> </names> <addressList> <address> <streetInfo> <houseNumber>22</houseNumber> <baseName>Street base name</baseName> <district>kewl district</district> </streetInfo> <zipcode>22231</zipcode> <state>xxx</state> <country>xxxz</country> <primary>true</primary> </address> </addressList> <CustomerId/> <SSN>561381</SSN> <phone> <homePhone>123123123</homePhone> <officePhone/> <homePhone>21319414</homePhone> </phone> <preferred>true</preferred> </Customer>
This is an exception getting thrown I just don't know what else to try :
NOT_FOUND_ERR: An attempt is made to reference a node in a context where it does not exist.