Parsing HTML from Java, How

Question

Problem:
I need to Connect to a URL using Java.
Then i need to detect/ parse the html of the url for Image contents
*So that i can replace some thing rather than the image such as with the text [IMAGE].*
I already able to connect and read the htmls of url. But i need ur help regarding parsing for image links.
Just i need to parse the html page to sense image links/contents on that page.
How it can be done?

Answer 1

hi shazzad,
Could you please try with this,
* XsdReader.java
* Created on September 12, 2008, 11:36 AM
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package EDITool;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
* @author Rajesh
public class XsdReader {
    /** Creates a new instance of XsdReader */
    private DocumentBuilder docBuilder;
    private Document doc;
    private DocumentBuilderFactory docBuilderFactory;
    private File xsdFile;
    private File xmlFile;
    private Hashtable dataList;
    private String modXML = "";
    public XsdReader() {
        docBuilder = null;
        doc = null;
        docBuilderFactory = DocumentBuilderFactory.newInstance();
        try{
                docBuilder = docBuilderFactory.newDocumentBuilder();
        catch(ParserConfigurationException e)
                System.out.println("Wrong parser configuration: " + e.getMessage());
        this.xsdFile = null;
        this.xmlFile = null;
        dataList = new Hashtable();
    public class Attr{
    private String minOccurs;
    private String maxOccurs;
    public Attr(String minOccurs, String maxOccurs)
            this.minOccurs = minOccurs;
            this.maxOccurs = maxOccurs;
    public void xsdParser(String xsdInputFileName,int level)
        try{
            this.xsdFile = new File(xsdInputFileName);
        catch(Exception e)
            System.out.println("File Not Exception: "+e);
        try{
          doc = docBuilder.parse(this.xsdFile);
                NodeList nodeList = doc.getChildNodes();
                xsdRecursive(nodeList,level);
     catch(SAXException e)
          System.out.println("Wrong XML file structure: " + e.getMessage());
     catch(IOException e)
          System.out.println("Wrong XML file structure: " + e.getMessage());
     catch(Exception e)
          System.out.println("Error: "+e);
    public void xsdRecursive(NodeList nodeList, int level)
        try{
          for(int i=0;i<nodeList.getLength();i++)
               Node node = nodeList.item(i);
               if(node.getNodeType() == node.ELEMENT_NODE  && level == 1)
                    if(node.hasAttributes())
                         Element e = (Element)node;
                         String minOccursValue = e.getAttribute("minOccurs");
                         if(!minOccursValue.equals(""))
                              String name = e.getAttribute("name");
                              if(name.equals(""))
                              name = e.getAttribute("ref");
                              if(name.equals(""))
                              continue;
                              String minOccurs = e.getAttribute("minOccurs");
                              String maxOccurs = e.getAttribute("maxOccurs");
                              System.out.println(name);
                              this.dataList.put(name,new Attr(minOccurs,maxOccurs));
                        else if(node.getNodeType() == node.ELEMENT_NODE  && level == 2)
                            String currentTagName = node.getNodeName();
                            Attr attr = (Attr)this.dataList.get(currentTagName);
                            NamedNodeMap nodeAttr = node.getAttributes();
                            org.dom4j.Node dom4jNode = (org.dom4j.Node) node;
                            org.dom4j.Element e = (org.dom4j.Element) dom4jNode;
                            e.addAttribute("min", attr.minOccurs);
                            e.addAttribute("max", attr.maxOccurs);
               if(node.hasChildNodes())
               xsdRecursive(node.getChildNodes(),level);
          catch(Exception e)
               System.out.println("Error: "+e);
    public void xsdRecursive(Node node, int level)
        NodeList nodeList = node.getChildNodes();
        try{
            for(int i=0;i<nodeList.getLength();i++)
            if(node.getNodeType() == Node.ELEMENT_NODE )
               // if(level == 1)
                if(node.hasAttributes())
                    Element e = (Element)node;
                    String minOccursValue = e.getAttribute("minOccurs");
                    if(!minOccursValue.equals(""))
                            String name = e.getAttribute("name");
                            if(name.equals(""))
                            name = e.getAttribute("ref");
                            String minOccurs = e.getAttribute("minOccurs");
                            String maxOccurs = e.getAttribute("maxOccurs");
                            System.out.println(name);
                            this.dataList.put(name,new Attr(minOccurs,maxOccurs));
                else if(level == 2)
                System.out.println("rajesh");
                String currentTagName = node.getNodeName();
                Attr attr = (Attr)this.dataList.get(currentTagName);
                NamedNodeMap nodeAttr = node.getAttributes();
                org.w3c.dom.Attr minAttr = ((Document)node).createAttribute("min");
                minAttr.setValue(attr.minOccurs);
                org.w3c.dom.Attr maxAttr = ((Document)node).createAttribute("max");
                minAttr.setValue(attr.maxOccurs);
                Element e =(Element)node;
                System.out.println(e.getNodeName()+"\t"+e.getAttribute("min"));
        catch(Exception e)
            System.out.println("Exception in xsdRecursive: "+e);
    public void display()
        Attr attr = (Attr) this.dataList.get("ISA01");
        System.out.println(attr.maxOccurs+"\t"+attr.minOccurs);
    public static void main(String s[])
        XsdReader xsdReader = new XsdReader();
        //String xsdInputFileName = "C:/Documents and Settings/vs73471/Documents/SAP/workspace/Sample/src/packages/com/sap/java/Copy of 850.xml";
        String xsdInputFileName = "C:/Documents and Settings/vs73471/Desktop/www.html";
        xsdReader.xsdParser(xsdInputFileName, 1);
        System.out.println(xsdReader.dataList.size());
        String xmlInputFileName = "C:/Documents and Settings/vs73471/Desktop/Reference XML Generate/850_Dummy.xml";
        xsdReader.xsdParser(xmlInputFileName, 2);
      //  xsdReader.display();
}