I have an XML1:
<letterContent>
<key1>key1</key1>
<key2>key2</key2>
<type>456</type>
<object1>789</object1>
<effectiveDate>00</effectiveDate>
<expandedData />
</letterContent>
... and XML 2:
<expandedData>
<rsnForReg>
<legacyTIN>
<asCurrent>leg123</asCurrent>
</legacyTIN>
<etpmTIN>
<asCurrent>etpm123</asCurrent>
</etpmTIN>
<regType>
<asCurrent/>
</regType>
</rsnForReg>
</expandedData>
I want to insert XML 2 in XML 1 document on the expandedData node using JAVA.
The final XML1 should look like:
<letterContent>
<key1>key1</key1>
<key2>key2</key2>
<type>456</type>
<object1>789</object1>
<effectiveDate>00</effectiveDate>
<expandedData>
<rsnForReg>
<legacyTIN>
<asCurrent>leg123</asCurrent>
</legacyTIN>
<etpmTIN>
<asCurrent>etpm123</asCurrent>
</etpmTIN>
<regType>
<asCurrent/>
</regType>
</rsnForReg>
</expandedData>
</letterContent>
XML2 inserted on the XML1's expandedData node. Any ideas? I know i need to build a recursive function to loop through XML 2 but not sure how to implement it in java.
Consider using XPath:
import static javax.xml.xpath.XPathConstants.*;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.*;
import org.w3c.dom.*;
import org.xml.sax.InputSource;
public class Xml2into1 {
public static void main(String[] args) throws Exception {
// read from files
InputSource xml1 = new InputSource("xml1.xml");
InputSource xml2 = new InputSource("xml2.xml");
// find the node to add to
XPath xpath = XPathFactory.newInstance()
.newXPath();
Node expandedData1 = (Node) xpath.evaluate("//expandedData", xml1, NODE);
Document doc1 = expandedData1.getOwnerDocument();
// insert the nodes
Node expandedData2 = (Node) xpath.evaluate("//expandedData", xml2, NODE);
expandedData1.getParentNode()
.replaceChild(doc1.adoptNode(expandedData2), expandedData1);
// print results
TransformerFactory.newInstance()
.newTransformer()
.transform(new DOMSource(doc1), new StreamResult(System.out));
}
}
Related
Im trying to insert a comment with syntax version information before the first node of an xml document but for some reason it always gets appended after the last element. I cant use other libraries like XStream and such.
I have already tried to do this via the append and the insertBefore method but both of them yield the same result. Is it possible to do this just with the plain Document, Comment and Node or do I have to use a Transformer?
Document doc = XmlDocumentUtil.createDocument();
//Create root node
Node rootNode = doc.createElement(NODE_DATA_CONFIGURATION);
doc.appendChild(rootNode);
//Create syntax identification comment
Comment syntaxIdentification = doc.createComment(writeSyntaxIdentificationQE);
doc.insertBefore(syntaxIdentification, rootNode);
//Create revision information
Element modificationNumber = doc.createElement("modificationNumber");
modificationNumber.setTextContent(String.valueOf(configTable.getModificationNumber()));
rootNode.appendChild(modificationNumber);
Element modificationTime = doc.createElement("modificationTime");
modificationTime.setTextContent(configTable.getModificationTime());
rootNode.appendChild(modificationTime);
Element modifier = doc.createElement("modifier");
modifier.setTextContent(configTable.getModifier());
rootNode.appendChild(modifier);
for (...) {
... some data generation
}
What I get:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<DataConfiguration>
<modificationNumber>2</modificationNumber>
<modificationTime>2019-07-25 07:42:28.804 +0200</modificationTime>
<modifier>testuser</modifier>
<someData idxFrom="4" idxTo="9"
signalName="1" signalOffset="273.15" signalTemplate="asdf" skip="Y"/>
</DataConfiguration>
<!--SyntaxIdentification: 1.0-->
What I need:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!--SyntaxIdentification: 1.0-->
<DataConfiguration>
<modificationNumber>2</modificationNumber>
<modificationTime>2019-07-25 07:42:28.804 +0200</modificationTime>
<modifier>testuser</modifier>
<someData idxFrom="4" idxTo="9"
signalName="1" signalOffset="273.15" signalTemplate="asdf" skip="Y"/>
</DataConfiguration>
To me your code seems good overall. Seems like you are missing only text nodes.
Here is full working code.
package xml;
import java.io.StringWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.*;
public class XMLComment {
public static void main(String[] args) throws ParserConfigurationException, TransformerException {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.newDocument();
// Create root node
Node rootNode = doc.createElement("DataConfiguration");
doc.appendChild(rootNode);
// Create syntax identification comment
Comment syntaxIdentification = doc.createComment("SyntaxIdentification: 1.0");
doc.insertBefore(syntaxIdentification, rootNode);
// Create modificationNumber
Node modificationNumber = doc.createElement("modificationNumber");
Text mnText = doc.createTextNode("123456");
modificationNumber.appendChild(mnText);
// Create modificationTime
Element modificationTime = doc.createElement("modificationTime");
Text mtText = doc.createTextNode("2019-07-25 07:42:28.804 +0200");
modificationTime.appendChild(mtText);
rootNode.appendChild(modificationNumber);
rootNode.appendChild(modificationTime);
printXML(doc);
}
private static void printXML(Document doc) throws TransformerException {
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
// initialize StreamResult with File object to save to file
StreamResult result = new StreamResult(new StringWriter());
DOMSource source = new DOMSource(doc);
transformer.transform(source, result);
String xmlString = result.getWriter().toString();
System.out.println(xmlString);
}
}
It will output, close to what exactly you are looking for.
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!--SyntaxIdentification: 1.0--><DataConfiguration>
<modificationNumber>123456</modificationNumber>
<modificationTime>2019-07-25 07:42:28.804 +0200</modificationTime>
</DataConfiguration>
Hope it helps.
I have a xml file. I need to get the sub child tag of the parent tag (Body) in xml file using Java. First I need to use DOM for reading an element
and get xml file from my local machine drive. I have one String varaible (Sring getSubChildValue = "181_paragraph_13") and I need to compare the value
with each and every attribute Value in the Xml file. If the given Value may be in sub child tag,I cont able to get a Value.
what I need to do for compare the String variable and with Xml File
What I need to do for print the Tag name if the String value is equal to any attrinbute Value.
Example: (P) Tag is the sub child of Tag (Body) which contain the given String Value. So I need to get tag name P.
How to avoid the Hard coding the sub-child Name to get the solution?
Example XML file:
<parent>
<Body class="student" id="181_student_method_3">
<Book class="Book_In_School_11" id="181_student_method_11"/>
<subject class="subject_information " id="181_student_subject_12"/>
<div class="div_passage " id="181_div_method_3">
<p class=" paragraph_book_name" id="181_paragraph_13">
<LiberaryBook class="Liberary" id="181_Liberary_9" >
<Liberary class="choice "
id="Liberary_replace_1" Uninversity="University_Liberary_1">
Dubliners</Liberary>
<Liberary class="choice "
id="Liberary_replace_2" Uninversity="University_Liberary_2">
Adventure if sherlock Holmes</Liberary>
<Liberary class="choice "
id="Liberary_replace_3" Uninversity="University_Liberary_3">
Charlotte’s Web</Liberary>
<Liberary class="choice "
id="Liberary_replace_4" Uninversity="University_Liberary_4">
The Outsiders</Liberary>
</LiberaryBook>
</p>
</div>
</Body>
</parent>
Example Java code:
import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class PerfectTagChange {
public static void main(String[] args) {
String filePath = "/xmlfile/Xml/check/sample.xml";
File xmlFile = new File(filePath);
DocumentBuilderFactory
dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder;
try {
dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(xmlFile);
doc.getDocumentElement().normalize();
Element root = doc.getDocumentElement();
changeValue(root,doc);
doc.getDocumentElement().normalize();
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(new File("/xmlfile/Xml/check/Demo.xml"));
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.transform(source, result);
System.out.println("XML file updated successfully");
} catch (SAXException | ParserConfigurationException | IOException | TransformerException e1) {
e1.printStackTrace();
}
}
//This Method is used to check which attribute contain given string Value : Hard code parent tag, But no other tag.
private static void changeValue(Node someNode,Document doc) {
Sring getSubChildValue = "181_paragraph_13"
NodeList childs = someNode.getChildNodes();
for (int in = 0; in < childs.getLength();) {
Node child = childs.item(in);
if (child.getNodeType() == Document.ELEMENT_NODE) {
if (child.getNodeName().equalsIgnoreCase("Body") ) {
//If I hard code the ID here on getNamedItem("id"),
If the attribute Name got Changed from ID to Name
it will be in problem.
//3.What is the solution for solving the problem.
if(child.getAtrribute.getNamedItem("id").getNodeValue().equals(getSubChildValue)){
system.out.println(child.getAtrribute.getNamedItem("id").getNodeValue());
}
}
}
}
}
If you change your code to this:
private static void changeValue(Node someNode, Document doc, String searchString) throws Exception {
XPath xPath = XPathFactory.newInstance().newXPath();
NodeList nodes = (NodeList) xPath.evaluate("//*[#*=\"" + searchString + "\"]",
doc.getDocumentElement(),
XPathConstants.NODESET);
for (int i = 0; i < nodes.getLength(); i++) {
System.out.println("Tagname: " + nodes.item(i).getNodeName());
}
}
you don't have the name of the attribute to be hardcoded.
EDIT:
Added searchString as parameter.
I have a Java Restful webservice that returns out an userdetails xml as below:
<userdetails>
<firstName>first</firstName>
<firstName>last</firstName>
<email>123#gmail.com</email>
</userdetails>
Any of the fields in the XML can contain special charecters which will cause issues for the client when they use Jaxb to convert xml into java object.
I can use "StringEscapeUtils.escapeXml" to escape special charecters in a field like say for firstName and it is escaping it correctly.
StringEscapeUtils.escapeXml(firstName);
But I have to do this for every field in my XML. Is there any way where I can escape the entire XML at once instead of doing it for every field.
Another option is to traverse all text elements, escaping them in the process (below code taken from here and slightly modified):
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import org.apache.commons.lang.StringEscapeUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
public class EscapeXml {
static String inputFile = "data.xml";
static String outputFile = "data_new.xml";
public static void main(String[] args) throws Exception {
Document doc = DocumentBuilderFactory.newInstance()
.newDocumentBuilder().parse(new InputSource(inputFile));
// locate the node(s)
XPath xpath = XPathFactory.newInstance().newXPath();
NodeList nodes = (NodeList)doc.getElementsByTagName("*");
// escape text nodes
for (int idx = 0; idx < nodes.getLength(); idx++) {
Node node = nodes.item(idx);
if (node.getNodeType() == Node.ELEMENT_NODE) {
NodeList childNodes = node.getChildNodes();
for (int cIdx = 0; cIdx < childNodes.getLength(); cIdx++) {
Node childNode = childNodes.item(cIdx);
if (childNode.getNodeType() == Node.TEXT_NODE) {
String newTextContent =
StringEscapeUtils.escapeXml(childNode.getTextContent());
childNode.setTextContent(newTextContent);
}
}
}
}
// save the result
Transformer xformer = TransformerFactory.newInstance().newTransformer();
xformer.transform(new DOMSource(doc), new StreamResult(new File(outputFile)));
}
}
I'm trying to parse an rdfs xml file in order to find all the Classes in an rdfs file.
The xpath: "/rdf:RDF/rdfs:Class"
is working in my XML editor.
When i insert the xpath in my Java program (i have implemented a dom parser), i get 0 Classes.
The following example runs but it outputs 0 classes!
I do:
import java.io.IOException;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPathExpressionException;
import org.xml.sax.SAXException;
public class Main {
public static void main(String args[]) throws XPathExpressionException, ParserConfigurationException, SAXException, IOException{
FindClasses FSB = new FindClasses();
FSB.FindAllClasses("C:\\Workspace\\file.xml"); //rdfs file
}
}
The class FindClasses is as follows:
import java.io.IOException;
import java.util.Collection;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class FindClasses {
public void FindAllClasses(String fileName) throws XPathExpressionException, ParserConfigurationException, SAXException, IOException {
DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
domFactory.setNamespaceAware(true);
DocumentBuilder builder = domFactory.newDocumentBuilder();
Document doc = builder.parse(fileName);
XPath xpath = XPathFactory.newInstance().newXPath();
XPathExpression classes_expr = xpath.compile("/rdf:RDF/rdfs:Class");
Object result = classes_expr.evaluate(doc, XPathConstants.NODESET);
NodeList classes = (NodeList) result;
System.out.println("I found : " + classes.getLength() + " classes " );
}
}
The rdfs file is:
<?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF xml:lang="en" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#">
<rdfs:Class rdf:about="Class1">
</rdfs:Class>
<rdfs:Class rdf:about="Class2">
</rdfs:Class>
</rdf:RDF>
I don't really understand why the xpath returns 0 nodes in that example.
It's weird, cause i have implemented other dom parsers as well and they were working fine.
Can somebody help me?
Thanks
I visited the following link and i solved my problem:
Issues with xpath in java
The problem was that the xpath contained two namespaces (rdf,rdfs) like "/rdf:RDF/rdfs:Class".
If the xpath didn't contain any namespace e.g. /RDF/Class , there was not going to be an issue.
So after the line:
xpath = XPathFactory.newInstance().newXPath();
and before the line:
XPathExpression classes_expr = xpath.compile("/rdf:RDF/rdfs:Class");
I added the following:
xpath.setNamespaceContext(new NamespaceContext() {
public String getNamespaceURI(String prefix) {
switch (prefix) {
case "rdf": return "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
case "rdfs" : return "http://www.w3.org/2000/01/rdf-schema#";
}
return prefix;
}
public String getPrefix(String namespace) {
if (namespace.equals("rdf")) return "rdf";
else if (namespace.equals("rdfs")) return "rdfs";
else return null;
}
#Override
public Iterator getPrefixes(String arg0) {
// TODO Auto-generated method stub
return null;
}
});
I would like to know how do I overwrite and existing element in Java using dom parser. for example, I have the file
I am trying to overwrite the element and replace it with the element
Thanks.
Algorithm is easy:
Read a file and parse it to XML document
Make any changes you want
Overwrite existing file with new content
See my example:
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
public class DomProgram {
public static void main(String[] args) throws Exception {
File xmlFile = new File("C:\\test.xml");
Document document = readXmlDocument(xmlFile);
makeChanges(document);
Transformer transformer = createXmlTransformer();
overwriteXmlFile(xmlFile, document, transformer);
}
private static void overwriteXmlFile(File xmlFile, Document document,
Transformer transformer) throws FileNotFoundException,
TransformerException {
StreamResult result = new StreamResult(new PrintWriter(
new FileOutputStream(xmlFile, false)));
DOMSource source = new DOMSource(document);
transformer.transform(source, result);
}
private static Transformer createXmlTransformer() throws Exception {
Transformer transformer = TransformerFactory.newInstance()
.newTransformer();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
return transformer;
}
private static void makeChanges(Document document) {
Element root = document.getDocumentElement();
root.setAttribute("test", "testvalue");
}
private static Document readXmlDocument(File xmlFile) throws Exception {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(xmlFile);
return document;
}
}
Example XML file:
<note>
<to>Ebele</to>
<from>mykhaylo</from>
<heading>Reminder</heading>
<body>Read about problem before you ask ;)</body>
</note>
Also see:
Simple Java DOM XML Example
How To Read XML File In Java – (DOM Parser)