Parsing XML

Being still relatively new at parsing XML with Java, I'd like some help with a JSP page I'm working on. I'm having trouble parsing subelements (e.g. Author in Authors). This is my code so far: (I'm doing the parsing with Xerces)

<%@ page language="java" %>
<%@ page import="javax.xml.parsers.*" %>
<%@ page import="org.w3c.dom.Document" %>
<%@ page import="org.w3c.dom.Element" %>
<%@ page import="org.w3c.dom.DOMException" %>
<%@ page import="java.net.URL" %>
<%@ page import="java.io.InputStream" %>
<%@ page import="java.io.IOException" %>

<FONT SIZE="4"><STRONG>Results</STRONG></FONT><BR><A HREF="10.jsp">Click Here to search again.</A><HR><BR>
<%
String fileName= "http://xml.amazon.com/onca/xml?v=1.0&t=webservices-20&dev-t=D4H18BA1ALLJ42&KeywordSearch=ColdFusion&mode=books&type=heavy&page=1&f=xml";
int listLength, listLengthAuthors;
Document document;
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

//Read XML file
//Open the file for reading:
URL u = new URL(fileName);
InputStream inputXML = u.openStream();

//Build document:
DocumentBuilder builder = factory.newDocumentBuilder();
document = builder.parse(inputXML);

//Generate the NodeList;
org.w3c.dom.NodeList nodeList = document.getElementsByTagName("Details");
listLength = nodeList.getLength(); // how many elements there are

// Query through XML File
for (int i=0; i<nodeList.getLength(); i++) {
String elementAsin = document.getElementsByTagName("Asin").item(i).getFirstChild().getNodeValue();
String elementProductName = document.getElementsByTagName("ProductName").item(i).getFirstChild().getNodeValue();
String elementCatalog = document.getElementsByTagName("Catalog").item(i).getFirstChild().getNodeValue();


String elementReleaseDate = document.getElementsByTagName("ReleaseDate").item(i).getFirstChild().getNodeValue();
String elementManufacturer = document.getElementsByTagName("Manufacturer").item(i).getFirstChild().getNodeValue();
String elementListPrice = document.getElementsByTagName("ListPrice").item(i).getFirstChild().getNodeValue();

out.print(elementAsin + "<BR>");
out.print(elementProductName + "<BR>");
out.print(elementCatalog + "<BR>");
out.print(elementReleaseDate + "<BR>");
out.print(elementManufacturer + "<BR>");
out.print(elementListPrice + "<BR>");

out.print("<HR>");
}
%>


This is the type of XML file I'm trying to parse - the above code retrieves an XML file from Amazon Web Services. (I'm not listing the whole XML file):

<Details url="http://www.amazon.com/exec/obidos/redirect?tag=webservices-20%26creative=D4H18BA1ALLJ42%26camp=2025%26link_code=xm2%26path=ASIN/0321125169">
<Asin>0321125169</Asin>
<ProductName>ColdFusion MX Web Application Construction Kit, Fifth Edition</ProductName>
<Catalog>Book</Catalog>
<Authors>
<Author>Ben Forta</Author>
<Author>Nate Weiss</Author>
<Author>Leon Chalnick</Author>
<Author>Angela C. Buraglia</Author>
</Authors>
<ReleaseDate>23 August, 2002</ReleaseDate>
<Manufacturer>Macromedia Press</Manufacturer>
<ImageUrlSmall>http://images.amazon.com/images/P/0...01.THUMBZZZ.jpg</ImageUrlSmall>
<ImageUrlMedium>http://images.amazon.com/images/P/0...01.MZZZZZZZ.jpg</ImageUrlMedium>
<ImageUrlLarge>http://images.amazon.com/images/P/0...01.LZZZZZZZ.jpg</ImageUrlLarge>
<ListPrice>$54.99</ListPrice>
<OurPrice>$38.49</OurPrice>
<UsedPrice>$29.85</UsedPrice>
<ThirdPartyNewPrice>$35.63</ThirdPartyNewPrice>
<SalesRank>1,865</SalesRank>
<Lists>
<ListId>WIM55ESR00FV</ListId>
<ListId>1VMBFGMQ6C7Q3</ListId>
<ListId>1HK0FJUSWVEXI</ListId>
</Lists>

.
.
.

and so on.

Elements such as Author and Lists have subelements. I'm curious to know how to extract these (Print them out like I am doing the other elements). If anyone has a solution I would gladly appreciate it. Thanks!

try
NodeList children = node.getChildren();
if(children != null){
// create for loop to go through the children
}

check out this site..

http://www-106.ibm.com/developerwor...ljava-menu.html

should answer all ur XML and java questions