I have got an xml file and try to read in some information and try to arrange them.
The data in the xml looks like:
<Class code="1-10" kind="category">
<Meta name="P17b-d" value="2"/>
<SuperClass code="1-10...1-10"/>
<SubClass code="1-100"/>
<Rubric kind="preferred">
<Label xml:lang="de" xml:space="default">Klinische Untersuchung</Label>
</Rubric>
</Class>
and my Java class looks like:
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
public class Importer {
public static void main(String[] args) {
try {
File inputFile = new File("ops2022.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
doc.getDocumentElement().normalize();
NodeList nList = doc.getElementsByTagName("Class");
for (int temp = 0; temp < 10; temp++) {
Node nNode = nList.item(temp);
System.out.println("\nCurrent Element :" + nNode.getNodeName() );
Element iElement = (Element) nNode;
if (nNode.getNodeType() == Node.ELEMENT_NODE && iElement.getAttribute("kind").equals("category") ) {
Element eElement = (Element) nNode;
System.out.println("code : "
+ eElement.getAttribute("code"));
System.out.println("Label : "
+ eElement
.getElementsByTagName("Label")
.item(0)
.getTextContent());
System.out.println("SuperClass : "
+ eElement
.getElementsByTagName("SuperClass")
//I don't know how to get the attribute code here
);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
But how do I get the attribute's information of the "SuperClass" Node? Idon't know why but java handles eElement.getAttributeNode("SuperClass") as a node, although it is an Element. So I can't use the getAttribute().
I added the code in your answer (#Hiran Chaudhuri) to get my needed information:
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
public class Importer {
public static void main(String[] args) {
try {
File inputFile = new File("ops2022.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
doc.getDocumentElement().normalize();
NodeList nList = doc.getElementsByTagName("Class");
for (int temp = 0; temp < 10; temp++) {
Node nNode = nList.item(temp);
System.out.println("\nCurrent Element :" + nNode.getNodeName() );
Element iElement = (Element) nNode;
if (nNode.getNodeType() == Node.ELEMENT_NODE && iElement.getAttribute("kind").equals("category") ) {
Element eElement = (Element) nNode;
System.out.println("code : "
+ eElement.getAttribute("code"));
System.out.println("Label : "
+ eElement
.getElementsByTagName("Label")
.item(0)
.getTextContent());
System.out.println("SuperClass : "
+ eElement
.getElementsByTagName("SuperClass")
Node n = eElement.getElementsByTagName("SuperClass").item(0);
if (n instanceof Attr) {
Attr a = (Attr)n;
System.out.println(a.getName());
System.out.println(a.getValue());
}
);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
And I get the following
----------------------------
Current Element :Class
Current Element :Class
Current Element :Class
code : 1-10
Label : Klinische Untersuchung
and if I add another else clause like
else {
Attr a = (Attr)n;
System.out.println(a.getValue());
}
java throws the following error:
java.lang.ClassCastException: class com.sun.org.apache.xerces.internal.dom.DeferredElementImpl cannot be cast to class org.w3c.dom.Attr (com.sun.org.apache.xerces.internal.dom.DeferredElementImpl and org.w3c.dom.Attr are in module java.xml of loader 'bootstrap')
at Importer.main(Importer.java:46)
.
With Element.getAttributeNode() you do receive a subclass/subinterface of Node called Attr. This Attr has getName() and getValue() methods that you should be interested in.
Using Element.getAttribute() will directly deliver the value of the corresponding attribute.
If you lost the chance to directly obtain the correct type, you can still recover like
Node n = ... // this is the attribute you are interested in
if (n instanceof Attr) {
Attr a = (Attr)n;
System.out.println(a.getName());
System.out.println(a.getValue());
}
So you are wondering how to access the SuperClass' code attribute. This code prints exactly the one value:
Document doc = dBuilder.parse(inputFile);
NodeList nList = doc.getElementsByTagName("Class"); // this list only contains Element nodes
for (int temp = 0; temp < nList.getLength(); temp++) {
Element nNode = (Element)nList.item(temp); // this is one 'class' element
NodeList nList2 = nNode.getElementsByTagName("SuperClass"); // this list only contains Element nodes
for (int temp2 = 0; temp2 < nList2.getLength(); temp2++) {
Element superclass = (Element)nList2.item(temp2);
String code = superclass.getAttribute("code");
System.out.println(code);
}
}
However this code does the same:
Document doc = dBuilder.parse(inputFile);
XPath xpath = XPathFactory.newInstance().newXPath();
String code = xpath.evaluate("/Class/SuperClass/#code", doc);
With XPath expressions you can navigate the DOM tree much more efficiently.
The following code did the job for me:
for (int i = 0; i < nList.getLength(); i++) {
//for (int i = 0; i < 20; i++) {
Node nNode = nList.item(i);
//System.out.println("\nCurrent Element :" + nNode.getNodeName() );
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
String supString = "OPS-2022";
NodeList fieldNodes = eElement.getElementsByTagName("SuperClass");
for(int j = 0; j < fieldNodes.getLength(); j++) {
Node fieldNode = fieldNodes.item(j);
NamedNodeMap attributes = fieldNode.getAttributes();
Node attr = attributes.getNamedItem("code");
if(attr != null) {
supString =attr.getTextContent();
}
}
}
}
Thanks for your help!
Related
I am parsing xml string from sql server. But my xml string is having nested tag, I am sharing xml string.
<abc sn="ahdahsdaud" family="abc" style="Aa" model="abc111222">
<part number="7N8901160101" fnum="5" qty="1.000" uom="EA">
<l2part number="075-76067-000" fnum="9000" qty="0.000" uom="EA" />
</part>
<part number="392-41230-001" fnum="440" qty="1.000" uom="EA">
<l2part number="092-41230-000" fnum="9000" qty="0.000" uom="EA" />
</part>
</abc>
so here I am getting part tag attributes by using the following code:
List<abBOM> list = new ArrayList<abBOM>();//pojo
abBOM abbom = null;
while(rs.next()){
SQLXML plan = rs.getSQLXML("XMLATT");//XMLAttribute
String xmlstr=plan.getString();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new StringReader(xmlstr)));
document.getDocumentElement().normalize();
Element root = document.getDocumentElement();
// System.out.println(root.getNodeName());
NodeList nList = document.getElementsByTagName("part");
// System.out.println("size"+nList.getLength());
for (int temp = 0; temp < nList.getLength(); temp++)
{
Node node = nList.item(temp);
if (node.getNodeType() == Node.ELEMENT_NODE)
{
Element eElement = (Element) node;
//System.out.println(eElement.getElementsByTagName("number").item(0).getTextContent());
abbom = new abBOM();
abbom.setNumber(eElement.getAttribute("number"));
abbom.setfindNumber(eElement.getAttribute("fnum"));
abbom.setQty(eElement.getAttribute("qty"));
abbom.setUom(eElement.getAttribute("uom"));
list.add(abbom);
}
}
}
Output List:
[[7N8901160101,5,1.000,EA], [392-41230-001,440,1.000,EA]]
I want to store l2part tag attributes in the same list ie. part attributes then l2part attributes like that. Plz suggest any way.
Thanks in advance.
Just repeat the loop, inside, something like this:
NodeList nList = document.getElementsByTagName("part");
// System.out.println("size"+nList.getLength());
for (int temp = 0; temp < nList.getLength(); temp++)
{
Element eElement = (Element) nList.item(temp);
// System.out.println(eElement.getElementsByTagName("number").item(0).getTextContent());
abbom = new abBOM();
abbom.setNumber(eElement.getAttribute("number"));
abbom.setfindNumber(eElement.getAttribute("fnum"));
abbom.setQty(eElement.getAttribute("qty"));
abbom.setUom(eElement.getAttribute("uom"));
list.add(abbom);
NodeList list2 = eElement.getElementsByTagName("l2part");
for (int t2 = 0; t2 < list2.getLength(); t2++)
{
eElement = (Element) list2.item(t2);
abBOM abbom2 = new abBOM();
abbom2.setNumber(eElement.getAttribute("number"));
abbom2.setfindNumber(eElement.getAttribute("fnum"));
abbom2.setQty(eElement.getAttribute("qty"));
abbom2.setUom(eElement.getAttribute("uom"));
list.add(abbom2);
}
}
Read the l2part as a new NodeList once you're processing the part element.
You can refactor your code to do it recursively. Assume that you XML is as simple as you show:
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.io.StringReader;
public class T {
static String data = "<abc sn=\"ahdahsdaud\" family=\"abc\" style=\"Aa\" model=\"abc111222\">\n" +
"<part number=\"7N8901160101\" fnum=\"5\" qty=\"1.000\" uom=\"EA\">\n" +
"<l2part number=\"075-76067-000\" fnum=\"9000\" qty=\"0.000\" uom=\"EA\" />\n" +
"</part>\n" +
"<part number=\"392-41230-001\" fnum=\"440\" qty=\"1.000\" uom=\"EA\">\n" +
"<l2part number=\"092-41230-000\" fnum=\"9000\" qty=\"0.000\" uom=\"EA\" />\n" +
"</part>\n" +
"</abc>";
public static void main(String[] args) throws ParserConfigurationException, IOException, SAXException {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new StringReader(data)));
document.getDocumentElement().normalize();
Element root = document.getDocumentElement();
// System.out.println(root.getNodeName());
NodeList nList = document.getElementsByTagName("part");
// System.out.println("size"+nList.getLength());
processNodeList(nList);
}
private static void processNodeList(NodeList nList) {
for (int temp = 0; temp < nList.getLength(); temp++)
{
Node node = nList.item(temp);
if (node.getNodeType() == Node.ELEMENT_NODE)
{
Element eElement = (Element) node;
//System.out.println(eElement.getElementsByTagName("number").item(0).getTextContent());
abbom = new abBOM();
abbom.setNumber(eElement.getAttribute("number"));
abbom.setfindNumber(eElement.getAttribute("fnum"));
abbom.setQty(eElement.getAttribute("qty"));
abbom.setUom(eElement.getAttribute("uom"));
list.add(abbom);
NodeList lpart2 = eElement.getElementsByTagName("l2part");
processNodeList(lpart2);
}
}
}
}
Be aware that if you have nested levels of l2part they will be processed too. Otherwise it will read an empty list. Might need refinement depending on your data
I am parsing an xml file which has one table as below:
<table name="categoryAttributeTable">
<row>
<field name="CID">201</field>
<field name="name">page_title</field>
<field name="value">Spotlight</field>
</row>
<row>
<field name="CID">301</field>
<field name="name">page_title</field>
<field name="value">Oryx highlights</field>
</row>
<row>
<field name="CID">501</field>
<field name="name">page_title</field>
<field name="value">Little Taster</field>
</row>
</table>
I want to search value of CID 301 for which the ans should be Oryx highlights but i am getting Spotlight as ans which is the value of CID 201. Why this might be happening???
My java code is :
public static void main(String argv[]) {
try {
File fXmlFile = new File("/home/media.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFile);
doc.getDocumentElement().normalize();
System.out.println("Root element :"+ doc.getDocumentElement().getNodeName());
NodeList nList = doc.getElementsByTagName("table");
System.out.println("----------------------------");
String titlevalue=null;
String cidvalue=null;
String lidvalue=null;
List a = new ArrayList();
for (int temp = 0; temp < nList.getLength(); temp++) {
Node nNode = nList.item(temp);
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
if(eElement.getAttribute("name").equalsIgnoreCase("categoryAttributeTable"))
{
NodeList nList1 = eElement.getElementsByTagName("row");
for (int temp1 = 0; temp1 < nList1.getLength(); temp1++) {
Node nNode1 = nList1.item(temp1);
if (nNode1.getNodeType() == Node.ELEMENT_NODE) {
Element eElement1 = (Element) nNode1;
NodeList nList2 = eElement1.getElementsByTagName("field");
for (int temp2 = 0; temp2 < nList2.getLength(); temp2++) {
Node nNode2 = nList2.item(temp2);
if (nNode2.getNodeType() == Node.ELEMENT_NODE) {
Element eElement2 = (Element) nNode2;
if(eElement2.getAttribute("name").equalsIgnoreCase("value"))
{
titlevalue=eElement2.getTextContent();
// System.out.println(" Title value :: "+titlevalue);
}
if(eElement2.getAttribute("name").equalsIgnoreCase("CID") && (eElement2.getTextContent().equals(String.valueOf(301))))
{
System.out.println(" Title value :: "+titlevalue);
}
}
}
}
}
}
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
In eElement2.getAttribute("name").equalsIgnoreCase() if i pass string then the output is coming as expected but if i pass integer as string then it is showing previous level's ans.
Please help me...
See this...
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class ReadXMLFile {public static void main(String argv[]) {
try {
File fXmlFile = new File("src/test.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFile);
doc.getDocumentElement().normalize();
System.out.println("Root element :"+ doc.getDocumentElement().getNodeName());
NodeList nList = doc.getElementsByTagName("table");
System.out.println("----------------------------");
String titlevalue=null;
String cidvalue=null;
String lidvalue=null;
List<String> valueList=new ArrayList<String>();
List<String> cidList=new ArrayList<String>();
for (int temp = 0; temp < nList.getLength(); temp++) {
Node nNode = nList.item(temp);
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
if(eElement.getAttribute("name").equalsIgnoreCase("categoryAttributeTable"))
{
NodeList nList1 = eElement.getElementsByTagName("row");
for (int temp1 = 0; temp1 < nList1.getLength(); temp1++) {
Node nNode1 = nList1.item(temp1);
if (nNode1.getNodeType() == Node.ELEMENT_NODE) {
Element eElement1 = (Element) nNode1;
NodeList nList2 = eElement1.getElementsByTagName("field");
for (int temp2 = 0; temp2 < nList2.getLength(); temp2++) {
Node nNode2 = nList2.item(temp2);
if (nNode2.getNodeType() == Node.ELEMENT_NODE) {
Element eElement2 = (Element) nNode2;
String value1=null;
String value2=null;
if(eElement2.getAttribute("name").equalsIgnoreCase("value"))
{
valueList.add(eElement2.getTextContent());
// System.out.println(" Title value :: "+eElement2.getTextContent());
}
if(eElement2.getAttribute("name").equalsIgnoreCase("CID") && !(eElement2.getTextContent().equals("NULL")))
{
// System.out.println(" XXXXXXXXXXX Title value :: "+eElement2.getTextContent());
cidList.add(eElement2.getTextContent());
}
}
}
}
}
}
}
}
for(int i=0;i<valueList.size();i++)
{
System.out.println("value :: "+ valueList.get(i)+" corresponding cid :: "+ cidList.get(i));
//System.out.println("cid :: "+ cidList.get(i));
}
}
catch (Exception e) {
e.printStackTrace();
}
}}
I just want to point out where your mistake is. This is your original code.
if (nNode2.getNodeType() == Node.ELEMENT_NODE) {
Element eElement2 = (Element) nNode2;
if(eElement2.getAttribute("name").equalsIgnoreCase("value")){
titlevalue=eElement2.getTextContent();
}
if(eElement2.getAttribute("name").equalsIgnoreCase("CID") && (eElement2.getTextContent().equals(String.valueOf(301)))) {
System.out.println(" Title value :: "+titlevalue);
}
}
<row>
<field name="CID">201</field>
<field name="name">page_title</field>
<field name="value">Spotlight</field>
</row>
<row>
<field name="CID">301</field>
<field name="name">page_title</field>
<field name="value">Oryx highlights</field>
</row>
The order of the values of name attribute are CID, name and value. In the end of first loop of row tag, you will set titlevalue = Spotlight. Then in the beginning of second loop of row tag, you will skip the first if as the first field attribute is equal to CID. But the program will enter the second if because you define name=CID and the content=301, hence it displays titlevalue = Spotlight.
Try this.
Element eElement1 = (Element) nNode1;
NodeList nList2 = eElement1.getElementsByTagName("field");
for (int temp2 = 0; temp2 < nList2.getLength(); temp2++) {
Node nNode2 = nList2.item(temp2);
if (nNode2.getNodeType() == Node.ELEMENT_NODE) {
Element eElement2 = (Element) nNode2;
String nameattr = eElement2.getAttribute("name");
if (nameattr.equalsIgnoreCase("CID")) {
titlevalue = eElement2.getTextContent();
// If CID != 301, skip the whole loop.
if (!titlevalue.equalsIgnoreCase("301")) {
break;
}
}
else if (nameattr.equalsIgnoreCase("value")) {
System.out.println("value: " + eElement2.getTextContent());
}
}
}
If I copy and paste the xml from this site into a xml file I can parse it with java
http://api.indeed.com/ads/apisearch?publisher=8397709210207872&q=java&l=austin%2C+tx&sort&radius&st&jt&start&limit&fromage&filter&latlong=1&chnl&userip=1.2.3.4&v=2
However, I want to parse it directly from a webpage if possible!
Here's my current code:
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
import java.io.File;
import java.io.IOException;
public class XMLParser {
public void readXML(String parse) {
File xml = new File(parse);
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder;
try {
dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(xml);
// System.out.println("Root element :"
// + doc.getDocumentElement().getNodeName());
NodeList nList = doc.getElementsByTagName("result");
System.out.println("----------------------------");
for (int temp = 0; temp < nList.getLength(); temp++) {
Node nNode = nList.item(temp);
// System.out.println("\nCurrent Element :" +
nNode.getNodeName());
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
System.out.println("job title : "
+
eElement.getElementsByTagName("jobtitle").item(0)
.getTextContent());;
System.out.println("Company: "
+
eElement.getElementsByTagName("company")
.item(0).getTextContent());
System.out.println("City : "
+
eElement.getElementsByTagName("city").item(0)
.getTextContent());
System.out.println("State : "
+
eElement.getElementsByTagName("state").item(0)
.getTextContent());
System.out.println("Country : "
+
eElement.getElementsByTagName("country").item(0)
.getTextContent());
System.out.println("Date posted : "
+
eElement.getElementsByTagName("date").item(0)
.getTextContent());
System.out.println("Job summary : "
+
eElement.getElementsByTagName("snippet").item(0)
.getTextContent());
System.out.println("Latitude : "
+
eElement.getElementsByTagName("latitude").item(0).getTextContent());
System.out.println("longitude : "
+
eElement.getElementsByTagName("longitude").item(0).getTextContent());
}
}
} catch (ParserConfigurationException | SAXException | IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args) {
new XMLParser().readXML("test.xml");
}
}
any help would be appreciated.
Give it the URI instead of the XML. It will download it for you.
Document doc = dBuilder.parse(uriString)
Please find the code snippet like this
String url = "http://api.indeed.com/ads/apisearch?publisher=8397709210207872&q=java&l=austin%2C+tx&sort&radius&st&jt&start&limit&fromage&filter&latlong=1&chnl&userip=1.2.3.4&v=2";
try
{
DocumentBuilderFactory f = DocumentBuilderFactory.newInstance();
DocumentBuilder b = f.newDocumentBuilder();
Document doc = b.parse(url);
}
you need to have the element/nodes you want in a for loop. So it can scan through xml file, and find the right node you searching for.
reads the xml file as a string, and creates a xml structure
builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(connection.getInputStream());
NodeList nodes = doc.getElementsByTagName("mode");
for (int i = 0; i < nodes.getLength(); i++)
Element element = (Element) nodes.item(i);
//Gets tag from XML and it´s content
NodeList nodeMode = element.getElementsByTagName("mode");
Element elemMode = (Element) nodeMode.item(0);
and after if you want to pick out a value and parse to an int or what you want you do like this:
int currentMode = Integer.parseInt(elemMode.getFirstChild().getTextContent());
That's how I parsed data directly from url http://www.nbp.pl/kursy/xml/+something
static class Kurs {
public float kurs_sprzedazy;
public float kurs_kupna;
}
private static DocumentBuilder dBuilder;
private static Kurs getData(String filename, String currency) throws Exception {
Document doc = dBuilder.parse("http://www.nbp.pl/kursy/xml/"+filename+".xml");
doc.getDocumentElement().normalize();
NodeList nList = doc.getElementsByTagName("pozycja");
for(int i = 0; i < nList.getLength(); i++) {
Element nNode = (Element)nList.item(i);
if(nNode.getElementsByTagName("kod_waluty").item(0).getTextContent().equals(currency)) {
Kurs kurs = new Kurs();
String data = nNode.getElementsByTagName("kurs_sprzedazy").item(0).getTextContent();
data = data.replace(',', '.');
kurs.kurs_sprzedazy = Float.parseFloat(data);
data = nNode.getElementsByTagName("kurs_kupna").item(0).getTextContent();
data = data.replace(',', '.');
kurs.kurs_kupna = Float.parseFloat(data);
return kurs;
}
}
return null;
}
I need to receive all the text alone from an xml file for receiving the specific tag i use this code. But i am not sure how to parse all the text from the XML i the XML files are different i don't know their root node and child nodes but i need the text alone from the xml.
try {
DocumentBuilderFactory dbFactory = DocumentBuilderFactory
.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(streamLimiter.getFile());
doc.getDocumentElement().normalize();
System.out.println("Root element :"
+ doc.getDocumentElement().getNodeName());
NodeList nList = doc.getElementsByTagName("employee");
System.out.println("-----------------------");
for (int temp = 0; temp < nList.getLength(); temp++) {
Node nNode = nList.item(temp);
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
NodeList nlList = eElement.getElementsByTagName("firstname")
.item(0).getChildNodes();
Node nValue = (Node) nlList.item(0);
System.out.println("First Name : "
+ nValue.getNodeValue());
}
}
} catch (Exception e) {
e.printStackTrace();
}
Quoting jsight's reply in this post: Getting XML Node text value with Java DOM
import java.io.ByteArrayInputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
class Test {
/**
* #param args the command line arguments
*/
public static void main(String[] args) throws Exception {
String xml = "<add job=\"351\">\n"
+ " <tag>foobar</tag>\n"
+ " <tag>foobar2</tag>\n"
+ "</add>";
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
ByteArrayInputStream bis = new ByteArrayInputStream(xml.getBytes());
org.w3c.dom.Document doc = db.parse(bis);
Node n = doc.getFirstChild();
NodeList nl = n.getChildNodes();
Node an, an2;
for (int i = 0; i < nl.getLength(); i++) {
an = nl.item(i);
if (an.getNodeType() == Node.ELEMENT_NODE) {
NodeList nl2 = an.getChildNodes();
for (int i2 = 0; i2 < nl2.getLength(); i2++) {
an2 = nl2.item(i2);
// DEBUG PRINTS
System.out.println(an2.getNodeName() + ": type (" + an2.getNodeType() + "):");
if (an2.hasChildNodes()) {
System.out.println(an2.getFirstChild().getTextContent());
}
if (an2.hasChildNodes()) {
System.out.println(an2.getFirstChild().getNodeValue());
}
System.out.println(an2.getTextContent());
System.out.println(an2.getNodeValue());
}
}
}
}
}
Output:
#text: type (3):
foobar
foobar
#text: type (3):
foobar2
Adapt this code to your problem and it should work.
I'm trying to read an XML file using java. I can sucessfully read the file but the problem is, I don't know how to read the values inside the column tag.
Since the column tags are not unique, I have no idea how to read them. Can someone help me.
Thanks in advance.
import java.net.URL;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class XMLReader {
public static void main(String argv[]) {
try {
//new code
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new URL("http://www.cse.lk/listedcompanies/overview.htm?d-16544-e=3&6578706f7274=1").openStream());
doc.getDocumentElement().normalize();
System.out.println("Root element " + doc.getDocumentElement().getNodeName());
NodeList nodeLst = doc.getElementsByTagName("row");
System.out.println("Information of all Stocks");
for (int s = 0; s < nodeLst.getLength(); s++) {
Node fstNode = nodeLst.item(s);
if (fstNode.getNodeType() == Node.ELEMENT_NODE) {
Element fstElmnt = (Element) fstNode;
//NodeList fstNmElmntLst = fstElmnt.getElementsByTagName("column");
//Element fstNmElmnt = (Element) fstNmElmntLst.item(0);
//NodeList fstNm = fstNmElmnt.getChildNodes();
//System.out.println("First Tag : " + ((Node) fstNm.item(0)).getNodeValue());
NodeList lstNmElmntLst = fstElmnt.getElementsByTagName("column");
// Element lstNmElmnt = (Element) lstNmElmntLst.item(0);
for (int columnIndex = 0; columnIndex < lstNmElmntLst.getLength(); columnIndex++) {
Element lstNmElmnt = (Element) lstNmElmntLst.item(columnIndex);
NodeList lstNm = lstNmElmnt.getChildNodes();
System.out.println("Last Tag : " + ((Node) lstNm.item(0)).getNodeValue());
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
This code :
NodeList fstNmElmntLst = fstElmnt.getElementsByTagName("column");
Return a List of column nodes, why not just use a for loop to iterate over them all instead of just reading the first one ?
for (int columnIndex = 0; columnIndex < fstNmElmntLst.getLength(); columnIndex++) {
Element fstNmElmnt = (Element) fstNmElmntLst.item(columnIndex);
...
}
You now get a NPE on:
<column/>
and you should check your list size before getting element 0:
NodeList lstNm = lstNmElmnt.getChildNodes();
if (lstNm.getLength() > 0) {
System.out.println("Last Tag : " + ((Node)lstNm.item(0)).getNodeValue());
} else {
System.out.println("No content");
}
And as you're processing text content in nodes, have a look at the answer to this SO question. Text nodes are irriting as:
<foo>
a
b
c
</foo>
can be or are more than one child node of foo, and getTextContent() can ease the pain a bit.