xml文件如下：
<?xml version="1.0" encoding="ISO-8859-1"?>
<inventory>
<book year="2000">
<title>Snow Crash</title>
<author>Neal Stephenson</author>
<publisher>Spectra</publisher>
<isbn>0553380958</isbn>
<price>14.95</price>
</book>
<book year="2001">
<title>Java Language</title>
<author>James Goslin</author>
<publisher>Spectra</publisher>
<isbn>0523356428</isbn>
<price>14.95</price>
</book>
<book year="2003">
<title>Ajax</title>
<author>Simon Elvis</author>
<author>Jerry Pournelle</author>
<publisher>Pocket</publisher>
<isbn>0531816460</isbn>
<price>5.99</price>
</book>
<book year="2005">
<title>Burning Tower</title>
<author>Larry Niven</author>
<author>Jerry Pournelle</author>
<publisher>Pocket</publisher>
<isbn>0743416910</isbn>
<price>5.99</price>
</book>
<book year="1995">
<title>Zodiac</title>
<author>Neal Stephenson</author>
<publisher>Spectra</publisher>
<isbn>0553573862</isbn>
<price>7.50</price>
</book>
</inventory>
代码如下：
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.ParserConfigurationException;
import java.io.File;
import java.io.IOException;
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;
public class DomBuilder {
public static void main(String[] args) {
File docfile = new File("books.xml");
Document doc = null;
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
doc = db.parse(docfile);
Element root = doc.getDocumentElement();
System.out.println("The root element is "+root.getNodeName());
NodeList titles = root.getElementsByTagName("title");
for(int titlenum=0;titlenum<titles.getLength();titlenum++){
System.out.println("before change title :"+titles.item(titlenum).getFirstChild().getNodeValue());
}
DomBuilder.changebook(root, "title", "processed");
NodeList titlesed = doc.getElementsByTagName("title");
for(int titlenum=0;titlenum<titlesed.getLength();titlenum++){
System.out.println("After change title :"+titlesed.item(titlenum).getFirstChild().getNodeValue());
}
} catch (ParserConfigurationException e) {
System.out.println("The parser was not configured correctly.");
System.exit(1);
} catch (SAXException e) {
System.out.println("Problem parsing the file.");
System.exit(1);
} catch (IOException e) {
System.out.println("Cannot read input file.");
System.exit(1);
}
}
private static void changebook(Node start,String eleName,String eleValue){
if(start.getNodeName().equals(eleName)){
start.getFirstChild().setNodeValue(eleValue);
System.out.println("set value finished !");
}
System.out.println("executed !");
for(Node child=start.getFirstChild();child!=null;child=start.getNextSibling()){
changebook(child,eleName,eleValue);
System.out.println("递归调用 ！");
}
}
}
执行之后，没有修改成功，有哪位高手能指点一下？谢谢！
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XML.ORG.CN讨论区 - XML技术 → 『 DOM/SAX/XPath 』 → [原创]Dom解析xml文件中，如何更改节点的值？代码查错，请教高手！
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2007/5/10 15:40:00
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[原创]Dom解析xml文件中，如何更改节点的值？代码查错，请教高手！
