原始的message.xml
<?xml version="1.0" encoding="UTF-8"?><users>
<Messages>
<sendName>sendUsers</sendName>
<receiveName>snake</receiveName>
<date>2007-12-04 12:20:00</date>
<status>1</status>
<message>this is Content</message>
</Messages>
</users>
java程序
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class UpdateXml {
public static boolean doc2XmlFile(Document document, String filename) {
boolean flag = true;
try {
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
// transformer.setOutputProperty(OutputKeys.ENCODING, "GB2312");
DOMSource source = new DOMSource(document);
StreamResult result = new StreamResult(new File(filename));
transformer.transform(source, result);
} catch (Exception ex) {
flag = false;
ex.printStackTrace();
}
return flag;
}
public static Document load(String filename) {
Document document = null;
try {
DocumentBuilderFactory factory = DocumentBuilderFactory
.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
document = builder.parse(new File(filename));
document.normalize();
} catch (Exception ex) {
ex.printStackTrace();
}
return document;
}
public static void xmlUpdateDemo() {
Document document = load("message.xml");
Node root = document.getDocumentElement();
if (root.hasChildNodes()) {
NodeList ftpnodes = root.getChildNodes();
for (int i = 0; i < ftpnodes.getLength(); i++) {
NodeList ftplist = ftpnodes.item(i).getChildNodes();
for (int k = 0; k < ftplist.getLength(); k++) {
Node subnode = ftplist.item(k);
// if (subnode.getNodeType()==Node.ELEMENT_NODE&&subnode.
// getNodeName()=="ftp-chn")
// {
// ftpnodes.item(i).removeChild(subnode);
// }
if (subnode.getNodeType() == Node.ELEMENT_NODE
&& subnode.getNodeName() == "status") {
subnode.getFirstChild().setNodeValue("9");
}
}
}
}
doc2XmlFile(document, "message.xml");
}
public static void main(String args[]) throws Exception {
UpdateXml.xmlUpdateDemo();
}
}
修改后的message.xml
<?xml version="1.0" encoding="UTF-8"?><users>
<Messages>
<sendName>sendUsers</sendName>
<receiveName>snake</receiveName>
<date>2007-12-04 12:20:00</date>
<status>9</status>
<message>this is Content</message>
</Messages>
</users>
posted on 2014-07-29 17:05
冯威威 阅读(515)
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JAVA基础类