java 中有关ｘｍｌ操作速记

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java 中有关ｘｍｌ操作速记

Author:lyore Date:2007-03-05 12:57

创建Document对象：

将字符串转换为Document对象：

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setValidating(false);
factory.setNamespaceAware(true);
Document dom = factory.newDocumentBuilder().parse(new InputSource(new StringReader(queryDef)));

得到字符串形式的Document对象：

StringWriter mysw = new StringWriter();
Transformer trans = TransformerFactory.newInstance().newTransformer();
doc.normalize();
trans.transform(new DOMSource(doc),new StreamResult(mysw));
String docXml ＝ mySw.toString();

得到字符串形式的Node对象：

TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.ENCODING,"UTF8");
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
DOMSource source = new DOMSource(node);
StringWriter writer = new StringWriter();
StreamResult sResult = new StreamResult(writer);
transformer.transform(source, sResult);
String result = writer.toString();

另: 如果一个Document结点需要悬挂(append)来自另一个Document对象的结点对象,直接用appendChild方法会出现org.w3c.dom.DOMException: DOM005 Wrong document error happens错误,解决办法是: oneNode.appendChild(oneDoc.importNode(otherNode,true)); 请注意其中importNode方法的使用.

以上所有关于xml操作均有可能出现非预期异常,所以需要捕获并作相关处理.

Tags: java xml

Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();