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how to parse XML object in JAVA [duplicate]

I have the following code:
DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(xmlFile);
How can I get it to parse XML contained within a String instead of a file?

I have this function in my code base, this should work for you.
public static Document loadXMLFromString(String xml) throws Exception
{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputSource is = new InputSource(new StringReader(xml));
return builder.parse(is);
}
also see this similar question

One way is to use the version of parse that takes an InputSource rather than a file
A SAX InputSource can be constructed from a Reader object. One Reader object is the StringReader
So something like
parse(new InputSource(new StringReader(myString))) may work.

Convert the string to an InputStream and pass it to DocumentBuilder
final InputStream stream = new ByteArrayInputStream(string.getBytes(StandardCharsets.UTF_8));
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
builder.parse(stream);
EDITIn response to bendin's comment regarding encoding, see shsteimer's answer to this question.

I'm using this method
public Document parseXmlFromString(String xmlString){
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputStream inputStream = new ByteArrayInputStream(xmlString.getBytes());
org.w3c.dom.Document document = builder.parse(inputStream);
return document;
}

javadocs show that the parse method is overloaded.
Create a StringStream or InputSource using your string XML and you should be set.

You can use the Scilca XML Progession package available at GitHub.
XMLIterator xi = new VirtualXML.XMLIterator("<xml />");
XMLReader xr = new XMLReader(xi);
Document d = xr.parseDocument();

xml and percent symbols

I'm using XMLStreamReader to parse a piece of xml:
XMLStreamReader rd = XMLInputFactory.newInstance().createXMLStreamReader(io_xml, "UTF-8");
...
if (eventType == XMLStreamConstants.START_ELEMENT) {
String name = rd.getLocalName();
if (name.equals("key")) {
String val = rd.getElementText();
}
}
Problem is, I'm getting a bad read for the following string: "<key>cami%C3%B5es%2Babc</key>"
org.junit.ComparisonFailure:
expected:<cami[%C3%B5es%]2Babc> but was:<cami[ C3 B5es ]2Babc>
Do I neeed to do anything special within the XML? I already tried to put everything within a CDATA section but I get the same error.
Using a "regular" parser everything works:
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputSource is = new InputSource(new StringReader(xml));
Document parse = builder.parse(is);
String value = parse.getFirstChild().getTextContent();
...

I figured it out. The problem was in a different section of the code. A setter that didn't just set.

Use a Remote XML as File [duplicate]

This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
How to read XML response from a URL in java?
I'm trying to read an XML file from my web server and display the contents of it on a ListView, so I'm reading the file like this:
File xml = new File("http://example.com/feed.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(xml);
doc.getDocumentElement().normalize();
NodeList mainNode = doc.getElementsByTagName("article");
// for loop to populate the list...
The problem is that I'm getting this error:
java.io.FileNotFoundException: /http:/mydomainname.com/feed.xml (No such file or directory)
Why I'm having this problem and how to correct it?

File is meant to point to local files.
If you want to point to a remote URI, the easiest is to use the class url
//modified code
URL url = new URL("http://example.com/feed.xml");
URLConnection urlConnection = url.openConnection();
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
//your code
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse( in );
As you can see, later on, thanks to java streaming apis, you can easily adapt your code logic to work with the content of the file. This is due to an overload of the parse method in class DocumentBuilder.

You need to use HTTPURLConnection to get xml as input stream and pass it DocumentBuilder, from there you can use the logic you have.
DefaultHttpClient client = new DefaultHttpClient();
HttpResponse resp = client.execute(yourURL);
if(resp.getStatusCode == 200)
{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.parse(resp.getEntity().getContent());
}
Note: I just type here, there may be syntax errors.

You need to read the file using a URL object. For instance, try something like this:
URL facultyURL = new URL("http://example.com/feed.xml");
InputStream is = facultyURL.openStream();

Create a FileReader from an XMLResponse?

I'm trying to create a FileReader (not a Document) from an XMLResponse like this :
// Parse XML Response
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder db = factory.newDocumentBuilder();
InputSource inStream = new InputSource();
inStream.setCharacterStream(new StringReader(XMLResponse));
Document doc = db.parse(inStream);
But I don't know how to use the InputSource to create it ?

You can't create a FileReader, because the response may not be coming from a file. But, as it seems, you can obtain a Reader, which is the proper way to refer to readers.
If a method requires specifically a FileReader, the method is not designed properly.

In Java, how do I parse XML as a String instead of a file?

I have the following code:
DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(xmlFile);
How can I get it to parse XML contained within a String instead of a file?

I have this function in my code base, this should work for you.
public static Document loadXMLFromString(String xml) throws Exception
{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputSource is = new InputSource(new StringReader(xml));
return builder.parse(is);
}
also see this similar question

One way is to use the version of parse that takes an InputSource rather than a file
A SAX InputSource can be constructed from a Reader object. One Reader object is the StringReader
So something like
parse(new InputSource(new StringReader(myString))) may work.

Convert the string to an InputStream and pass it to DocumentBuilder
final InputStream stream = new ByteArrayInputStream(string.getBytes(StandardCharsets.UTF_8));
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
builder.parse(stream);
EDITIn response to bendin's comment regarding encoding, see shsteimer's answer to this question.

I'm using this method
public Document parseXmlFromString(String xmlString){
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputStream inputStream = new ByteArrayInputStream(xmlString.getBytes());
org.w3c.dom.Document document = builder.parse(inputStream);
return document;
}

javadocs show that the parse method is overloaded.
Create a StringStream or InputSource using your string XML and you should be set.

You can use the Scilca XML Progession package available at GitHub.
XMLIterator xi = new VirtualXML.XMLIterator("<xml />");
XMLReader xr = new XMLReader(xi);
Document d = xr.parseDocument();