Java操作XML工具类XmlUtil详解

本文实例为大家分享了Java操作XML工具类的具体代码，供大家参考，具体内容如下
一、代码
public class XmlUtil {
 
 public static void outputXml(document doc, String fileName)
 throws Exception {
 TransformerFactory tf = TransformerFactory.newInstance();
 Transformer transformer = tf.newTransformer();
 DOMSource source = new DOMSource(doc);
 transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
 transformer.setOutputProperty(OutputKeys.INDENT, "yes");
 PrintWriter pw = new PrintWriter(new FileOutputStream(fileName));
 StreamResult result = new StreamResult(pw);
 transformer.transform(source, result);
 System.out.println("生成XML文件成功!");
 }
 
 
 public static document generateXml(String ip) {
 document doc = null;
 Element root = null;
 try {
 documentBuilderFactory factory = documentBuilderFactory
  .newInstance();
 documentBuilder builder = factory.newdocumentBuilder();
 doc = builder.newdocument();
 root = doc.createElement("errorDevices");
 doc.appendChild(root);
 } catch (Exception e) {
 e.printStackTrace();
 return null;// 如果出现异常，则不再往下执行
 }
 
 Element element;
 element = doc.createElement("errorDevice");
 element.setAttribute("ip", ip);
 element.setAttribute("date",
 StringUtil.formatDate(new Date(), "yyyy-MM-dd hh:mm:ss"));
 element.setAttribute("status", "1");
 root.appendChild(element);
 return doc;
 }
 
 
 public static void toWrite(String filename, String ip)
 throws FileNotFoundException, TransformerException {
 String date = StringUtil.formatDate(new Date(), "yyyy-MM-dd hh:mm:ss");
 documentBuilderFactory factory = documentBuilderFactory.newInstance();
 documentBuilder builder = null;
 document doc = null;
 try {
 builder = factory.newdocumentBuilder();
 doc = builder.parse(new File(filename));
 } catch (ParserConfigurationException e) {
 e.printStackTrace();
 } catch (SAXException e) {
 e.printStackTrace();
 } catch (IOException e) {
 e.printStackTrace();
 }
 NodeList links = doc.getElementsByTagName("errorDevice");
 if (links.getLength() > 0) {
 for (int i = 0; i < links.getLength(); i++) {
 Node nd = links.item(i);
 Node catParent = nd.getParentNode();
 Element ele = (Element) nd;
 String url = ele.getAttribute("ip");
 if (url.equals(ip)) {
  // ele.setAttribute("date", date);
  catParent.removeChild(nd);
 }
 }
 }
 Element element = doc.createElement("errorDevice");
 element.setAttribute("ip", ip);
 element.setAttribute("date",
 StringUtil.formatDate(new Date(), "yyyy-MM-dd hh:mm:ss"));
 element.setAttribute("status", "1");
 doc.getdocumentElement().appendChild(element);
 TransformerFactory tf = TransformerFactory.newInstance();
 Transformer transformer = tf.newTransformer();
 DOMSource source = new DOMSource(doc);
 transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
 transformer.setOutputProperty(OutputKeys.INDENT, "yes");
 PrintWriter pw = new PrintWriter(new FileOutputStream(filename));
 StreamResult result = new StreamResult(pw);
 transformer.transform(source, result);
 System.out.println("新增XML节点成功!");
 }
 
 
 public static List readXml(String filename){
 documentBuilderFactory factory = documentBuilderFactory.newInstance();
 documentBuilder builder = null;
 document doc = null;
 try {
 builder = factory.newdocumentBuilder();
 doc = builder.parse(new File(filename));
 } catch (ParserConfigurationException e) {
 e.printStackTrace();
 } catch (SAXException e) {
 e.printStackTrace();
 } catch (IOException e) {
 e.printStackTrace();
 }
 NodeList links = doc.getElementsByTagName("errorDevice");
 List list = new ArrayList();
 for(int i = 0; i< links.getLength() ; i ++){
   Element node = (Element)links.item(i);
   Map map = new HashMap();
   map.put(node.getAttribute("ip"), node.getAttribute("date"));
   list.add(map);
 }
 return list;
 }
}
二、演示XML
三、最终效果图
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。
Java操作XML工具类XmlUtil详解

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