We Keep Coding

dom parser getElement

I want to only get restaurants in beirut with dom parser please help
this is a part from my xml file :
city -> beirut->restaurants->restaurant->name->
tyr->restaurants->restaurant->name->
jbeil->restaurants->restaurant->name->
<restaurants>
<restaurant>
<name>
...
</restaurant>
</restaurants>
<restaurants>
<restaurant>
<name>
...
</restaurant>
</restaurants>
<restaurants>
<restaurant>
<name>
...
</restaurant>
</restaurants>
because this code give me all restaurants in all city's :
try {
File inputFile = new File("src/josephXml.xml");
DocumentBuilderFactory dbFactory
= DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
doc.getDocumentElement().normalize();
NodeList nList = doc.getElementsByTagName("Restaurant");
for (int temp = 0; temp < nList.getLength(); temp++) {
Node nNode = nList.item(temp);
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
jTextArea1.append( "\n"+"Name : "+ eElement
.getElementsByTagName("name")
.item(0)
.getTextContent()+"\n "
, i only want restaurants in beirut please help

You use Restaurant, but your file uses restaurant. It's not OK, because case sensitive.
use XPath: you can select many things, it is very readable.
Replace this in your code:
XPath xPath = XPathFactory.newInstance().newXPath();
String expression="/city/beirut/restaurants/restaurant";
NodeList nList = (NodeList) xPath.compile(expression).evaluate(document, XPathConstants.NODESET);

Get element with xml dom parser [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 7 years ago.
Improve this question
How to get restaurant name in jbeil only using xml DOM parser , please help :
And this is my XML file
<city>
<beirut>
<restaurant>
<name>sada</name>
</restaurant>
</beirut>
<jbeil>
<restaurant>
<name>sada</name>
</restaurant>
</jbeil>
<sour>
<restaurant>
<name>sada</name>
</restaurant>
</sour>
</city>
I want to get the name of restaurant in Jbeil using dom parser and this code give me restaurants name in all city's:
try {
File inputFile = new File("src/josephXml.xml");
DocumentBuilderFactory dbFactory
= DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
doc.getDocumentElement().normalize();
NodeList nList = doc.getElementsByTagName("Restaurant");
for (int temp = 0; temp < nList.getLength(); temp++) {
Node nNode = nList.item(temp);
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
jTextArea1.append( "\n"+"Name : "+ eElement
.getElementsByTagName("name")
.item(0)
.getTextContent()+"\n "

use XPath
many resources: http://viralpatel.net/blogs/java-xml-xpath-tutorial-parse-xml/
something like that (not tested)
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactory;
XPath xPath =  XPathFactory.newInstance().newXPath();
String expression = "/city/jbeil/restaurant/name";
//read a string value
String thename= xPath.compile(expression).evaluate(xmlDocument);

Using the same code style as you and "only using xml DOM parser" get the jbeil and then the restaurant...
NodeList nList = doc.getElementsByTagName("jbeil");
for (int i = 0; i < nList.getLength(); i++) {
Node nNode = nList.item(i);
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
NodeList nList2 = eElement.getElementsByTagName("restaurant");
for (int n = 0; n < nList.getLength(); n++) {
Node nNode2 = nList2.item(n);
if (nNode2.getNodeType() == Node.ELEMENT_NODE) {
Element eElement2 = (Element) nNode;
System.out.println(eElement2.getElementsByTagName("name").item(0).getTextContent());
}
}
}
}
But I would go for the XPath answer...

How to print values within XML tag in java [duplicate]

This question already has answers here:
Get element name from XML in Java DOM
(3 answers)
Closed 8 years ago.
I never really know how to work with XML tags.How do I traverse the node and print particular node in the XML tag.Below is the XML file.
<Employees>
<Employee>
<Gender></Gender>
<Name>
<Firstname></Firstname>
<Lastname></Lastname>
</Name>
<Email></Email>
<Projects>
<Project></Project>
</Projects>
<PhoneNumbers>
<Home></Home>
<Office></Office>
</PhoneNumbers>
</Employee>
There is no data but this is the structure.I am using the following code to parse it partially.
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(false);
DocumentBuilder builder = factory.newDocumentBuilder();
Document xmlDocument = builder.parse("employees.xml");
System.out.println(xmlDocument.getDocumentElement().getNodeName());
I would like to print the gender and lastname values.How do I parse the tag which is inside the Name tag which in turn the Name is inside the Employee tag.
Regards.

You should use XPATH. There is a good explanation in this post.
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(<uri_as_string>);
XPathFactory xPathfactory = XPathFactory.newInstance();
XPath xpath = xPathfactory.newXPath();
XPathExpression expr = xpath.compile(<xpath_expression>);

Try this.
String expression = "/Employees/Employee/Gender"; //read Gender value
NodeList nList = (NodeList) xPath.compile(expression).evaluate(document, XPathConstants.NODESET);
for (int j = 0; nList != null && j < nList.getLength(); j++) {
Node node = nList.item(j);
System.out.println("" + node.getFirstChild().getNodeValue());
}
expression = "/Employees/Employee/Name/Lastname"; //read Lastname value
nList = (NodeList) xPath.compile(expression).evaluate(document, XPathConstants.NODESET);
for (int j = 0; nList != null && j < nList.getLength(); j++) {
Node node = nList.item(j);
System.out.println("" + node.getFirstChild().getNodeValue());
}

how to get attribute of given node?

I am trying to write DOM XML parsing.
My Xml file
<?xml version="1.0"?>
<BLAH>
<AgentNm type="citi1">
<accName>accName1</accName>
<accType>accType1</accType>
<someThing>someThing1</someThing>
<amt>100000</amt>
</AgentNm>
<AgentNm type="citi2">
<accName>accName2</accName>
<accType>accType2</accType>
<someThing>someThing2</someThing>
<amt>200000</amt>
</AgentNm>
</BLAH>
And i tried following java code
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
Document doc = docBuilder.parse (new File("c:\\file.xml"));
// normalize text representation
doc.getDocumentElement ().normalize ();
System.out.println ("Root element of the doc is " +doc.getDocumentElement().getNodeName());
NodeList agentNm = doc.getElementsByTagName("AgentNm");
int totalAgentNm = agentNm.getLength();
System.out.println("Total no of Agents : " + totalAgentNm);
for(int s=0; s<agentNm.getLength() ; s++){
Node firstPersonNode = agentNm.item(s);
if(firstPersonNode.getNodeType() == Node.ELEMENT_NODE){
Element firstPersonElement = (Element)firstPersonNode;
PrintNodeElem(firstPersonElement,"type");
}//end of if clause
}//end of for loop with s var
static void PrintNodeElem(Element nodeElem,String elem){
NodeList someThingList = nodeElem.getElementsByTagName(elem);
Element ageElement = (Element)someThingList.item(0);
NodeList textAgeList = ageElement.getChildNodes();
System.out.println(elem+" : " +((Node)textAgeList.item(0)).getNodeValue().trim());
}
But, when i tried to execute above method,
i am getting null pointer exception.
can any one explain me, how to fix this.

if you want an attribute of a given node, I would suggest XPath. It is much easier.
http://onjava.com/onjava/2005/01/12/xpath.html

XML parser gives null element

When I try to parse a XML-file, it gives sometimes a null element by the title.
I think it has to do with HTML-tags '
How can I solve this problem?
I have the follow XML-file:
<item>
<title>' Nieuwe DVD '</title>
<description>tekst, tekst tekst</description>
<link>dvd.html</link>
<category>nieuws</category>
<pubDate>Sat, 1 Jan 2011 9:24:00 +0000</pubDate>
</item>
And the follow code to parse the xml-file:
//DocumentBuilderFactory, DocumentBuilder are used for
//xml parsing
DocumentBuilderFactory dbf = DocumentBuilderFactory
.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
//using db (Document Builder) parse xml data and assign
//it to Element
Document document = db.parse(is);
Element element = document.getDocumentElement();
//take rss nodes to NodeList
element.normalize();
NodeList nodeList = element.getElementsByTagName("item");
if (nodeList.getLength() > 0)
{
for (int i = 0; i < nodeList.getLength(); i++)
{
//take each entry (corresponds to <item></item> tags in
//xml data
Element entry = (Element) nodeList.item(i);
entry.normalize();
Element _titleE = (Element) entry.getElementsByTagName(
"title").item(0);
Element _categoryE = (Element) entry
.getElementsByTagName("category").item(0);
Element _pubDateE = (Element) entry
.getElementsByTagName("pubDate").item(0);
Element _linkE = (Element) entry.getElementsByTagName(
"link").item(0);
String _title = _titleE.getFirstChild().getNodeValue();
String _category = _categoryE.getFirstChild().getNodeValue();
Date _pubDate = new Date(_pubDateE.getFirstChild().getNodeValue());
String _link = _linkE.getFirstChild().getNodeValue();
//create RssItemObject and add it to the ArrayList
RssItem rssItem = new RssItem(_title, _category, _pubDate, _link);
rssItems.add(rssItem);
conn.disconnect();
}

Don't use getFirstElement when you really want getTextContent.