How to parse and Retrive column names from xml String

Question

1.80/5 (3 votes)

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Hi All,
How to Parse following string to get All Column Names in Java?

XML

<NewDataSet>
  <xs:schema id="NewDataSet" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
    <xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:MainDataTable="FFSM" msdata:UseCurrentLocale="true">
      <xs:complexType>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
          <xs:element name="FFSM">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="gactcd" type="xs:string" minOccurs="0" />
                <xs:element name="sactcd" type="xs:string" minOccurs="0" />
                <xs:element name="sactnm" type="xs:string" minOccurs="0" />
                <xs:element name="address" type="xs:string" minOccurs="0" />
                <xs:element name="place" type="xs:string" minOccurs="0" />
                <xs:element name="place1" type="xs:string" minOccurs="0" />
                <xs:element name="phone" type="xs:string" minOccurs="0" />
                <xs:element name="email" type="xs:string" minOccurs="0" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
        </xs:choice>
      </xs:complexType>
    </xs:element>
  </xs:schema>
  <FFSM>
      <gactcd>D</gactcd>
    <sactcd>*&amp;D1</sactcd>
    <sactnm>*JAGDISH &amp; CO</sactnm>
    <address>-</address>
    <place>D-21 APMC</place>
    <place1>D-21 APMC</place1>
    <phone />
    <email />
  </FFSM>
  </NewDataSet>

Posted 6-May-15 3:05am

Shruti91

Updated 23-Jul-15 21:36pm

v2

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Comments

Tomas Takac 6-May-15 9:22am

What have you tried?

Shruti91 6-May-15 9:33am

I Wants to use in This Way
DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();
InputSource is = new InputSource();
is.setCharacterStream(new StringReader(xmlString));

Document doc = db.parse(is);
NodeList nodes = doc.getElementsByTagName("FFSM");

for (int i = 0; i < nodes.getLength(); i++) {
Element element = (Element) nodes.item(i);

NodeList name = element.getElementsByTagName("gactcd");
Element line = (Element) name.item(0);
System.out.println("General AC Code: " + getCharacterDataFromElement(line));

}

2 solutions

Solution 1

You are parsing it as XML, which is perfectly fine (you did not explain what your problem is).

But this is not just XML, but specialized XML representing XML schema, so it would be better to use specialized parser for XSD. Please see:
https://xsom.java.net/nonav/javadoc/com/sun/xml/xsom/parser/XSOMParser.html[^],
from https://xsom.java.net[^].

—SA

Posted 6-May-15 4:09am

Sergey Alexandrovich Kryukov

Comments

Shruti91 7-May-15 2:42am

your links doesn't get me solution.
I created DataTable class in java which is similar like System.Data.DataTable
and I wants to load records from xml string to my DataTable.

Sergey Alexandrovich Kryukov 7-May-15 9:20am

It will give you more than your own code — the XML schema. This is exactly what you need to create database schema — tables and all.
—SA

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Sid_Joshi · Accepted Answer · 2015-05-17T20:30:00

try this

public static Document getDomElement(String xml){
		Document doc = null;
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		try {

			DocumentBuilder db = dbf.newDocumentBuilder();

			InputSource is = new InputSource();
		        is.setCharacterStream(new StringReader(xml));
		        doc = db.parse(is); 
		       

			} catch (ParserConfigurationException e) {
				
				System.out.println("Error: "+ e.getMessage());
				return null;
			} catch (SAXException e) {
				System.out.println("Error: "+ e.getMessage());
	            return null;
			} catch (IOException e) {
				System.out.println("Error: "+ e.getMessage());
				return null;
			}
	        return doc;
	}
	public final static String getElementValue( Node elem ) {
	     Node child;
	     if( elem != null){
	         if (elem.hasChildNodes()){
	             for( child = elem.getFirstChild(); child != null; child = child.getNextSibling() ){
	                 if( child.getNodeType() == Node.TEXT_NODE  ){
	                     return child.getNodeValue();
	                 }
	             }
	         }
	     }
	     return "";
	 }