how to get the attribute value of an xml node using java

Question

I ve an xml which looks like this      lt xml gt  lt ep gt  lt source type  xml  gt     lt  source gt  lt source type  text  gt    lt  source gt  lt  ep gt  lt  xml gt     here i wanna retrieve the value of  source type  where type s an attribute   I  d tried like this But its not working    DocumentBuilderFactory domFactory   DocumentBuilderFactory newInstance                    try                       DocumentBuilder builder   domFactory newDocumentBuilder                        Document dDoc   builder parse  D  workspace1 ereader src main webapp configurations config xml                        System out println dDoc                       XPath xPath   XPathFactory newInstance   newXPath                        Node node    Node  xPath evaluate    xml source  type text     dDoc  XPathConstants NODE                       System out println node                     catch  Exception e                        e printStackTrace      i ve tried this too    DocumentBuilderFactory factory   DocumentBuilderFactory newInstance                DocumentBuilder builder   factory newDocumentBuilder                InputSource is   new InputSource new StringReader  config xml                 Document doc   builder parse is                NodeList nodeList   doc getElementsByTagName  source                 for  int i   0  i  lt  nodeList getLength    i                                      Node node   nodeList item i                    if  node hasAttributes                          Attr attr    Attr  node getAttributes   getNamedItem  type                        if  attr    null                            String attribute  attr getValue                                                  System out println  attribute      attribute                                                                                 pls help me    Thanks in advance  Varsha

User · Accepted Answer

Since your question is more generic so try to implement it with XML Parsers available in Java  If you need it in specific to parsers  update your code here what you have tried yet   lt  xml version  1 0  encoding  UTF-8   gt   lt ep gt       lt source type  xml  gt TEST lt  source gt       lt source type  text  gt  lt  source gt   lt  ep gt    DocumentBuilderFactory domFactory   DocumentBuilderFactory newInstance    DocumentBuilderFactory factory   DocumentBuilderFactory newInstance    DocumentBuilder builder   factory newDocumentBuilder    Document doc   builder parse  uri to xmlfile    XPathFactory xPathfactory   XPathFactory newInstance    XPath xpath   xPathfactory newXPath    XPathExpression expr   xpath compile    ep source  type     NodeList nl    NodeList  expr evaluate doc  XPathConstants NODESET    for  int i   0  i  lt  nl getLength    i          Node currentItem   nl item i       String key   currentItem getAttributes   getNamedItem  type   getNodeValue        System out println key

User · Answer

try something like this        DocumentBuilder builder   DocumentBuilderFactory newInstance   newDocumentBuilder        Document dDoc   builder parse  d   utf8test xml         XPath xPath   XPathFactory newInstance   newXPath        NodeList nodes    NodeList  xPath evaluate    xml ep source  type   dDoc  XPathConstants NODESET       for  int i   0  i  lt  nodes getLength    i              Node node   nodes item i           System out println node getTextContent             please note the changes      we ask for a nodeset  XPathConstants NODESET  and not only for a single node  the xpath is now   xml ep source  type  and not   xml source  type text     PS  can you add the tag java to your question   thanks

User · Answer

Below is the code to do it in VTD-XML  import com ximpleware     public class queryAttr       public static void main String   s  throws VTDException           VTDGen vg  new VTDGen             if   vg parseFile  input xml   false               return false           VTDNav vn   vg getNav             AutoPilot ap   new AutoPilot vn            ap selectXPath    xml ep source  type             int i 0           while  i   ap evalXPath     -1                  system out println   attr val     gt    vn toString i 1

User · Answer

use          document getElementsByTagName           to get all XML elements from within an XML file  this does however return repeating attributes  example      NodeList list   doc getElementsByTagName                      System out println  XML Elements                for  int i 0  i lt list getLength    i                   Element element    Element list item i               System out println element getNodeName

User · Answer

public static void main String   args  throws IOException       String filePath     Users myXml VH181 xml       File xmlFile   new File filePath       DocumentBuilderFactory dbFactory   DocumentBuilderFactory newInstance        DocumentBuilder dBuilder      try           dBuilder   dbFactory newDocumentBuilder            Document doc   dBuilder parse xmlFile           doc getDocumentElement   normalize            printElement doc           System out println  XML file updated successfully          catch  SAXException   ParserConfigurationException e1            e1 printStackTrace            private static void printElement Document someNode        NodeList nodeList   someNode getElementsByTagName  choiceInteraction        for int z 0 size  nodeList getLength   z lt size  z                  String Value   nodeList item z  getAttributes   getNamedItem  id   getNodeValue                System out println  Choice Interaction Id   Value                      we Can try this code using method

User · Answer

I m happy that this snippet works fine   DocumentBuilderFactory dbf   DocumentBuilderFactory newInstance    DocumentBuilder db   dbf newDocumentBuilder    Document document   db parse new File  config xml     NodeList nodeList   document getElementsByTagName  source    for int x 0 size  nodeList getLength    x lt size  x          System out println nodeList item x  getAttributes   getNamedItem  type   getNodeValue

[java] how to get the attribute value of an xml node using java

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