标签:bsp can specific util string muti stat extc tag
We can see that when we want to use the Dom4j to parse XML , we should import org.dom4j.*
At the same time ,that to parse XML by DOM ,we should import org.w3c.dom.*
The conclusion is that DOM and Dom4j is different and located in different jar.The DOM belongs to w3c and the Dom4j belongs to dom4j.
But how do we parse XML by DOM?
//1.get the DocumentBuilderFactory by its static method
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
//2.get the DocumentBuilder by DocumentBuilderFactory‘s newDocumentBuilder() method
DocumentBuilder builder = factory.newDocumentBuilder();
//3.get the Document object by DocumentBuilder
Document document = DocumentBuilder.parse("book.xml");
//4.to handle the document further ,we can use getElementByTagName("") method get the NodeList
NodeList list = document.getElementByTagName("");
//5.get the single specific node
Node node = list.item(0);
//6.print the node‘s text content
System.out.println(node.getTextContent());
To improve the effeciency of using DOM to parse XML , write a util is not a bad idea,isn‘t it?
public class DOMUtils{
public static Document getDocument(String path){
return DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(path);
}
public static Document getDocument(File file){
return DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(path);
}
public void writeXml2File(Document document,String path){
TransformerFactory.newInstance().newTransformer.transform(new DOMSource(document),new StreamResult(path));
}
}
To append an element to a specific element by DOM , we can use these code:
//1.create an element first
Element element = document.createElement("element‘s name");
//2.set the element‘s text content
element.setTextContent("element‘s content text");
//3.set the element as the child element and append this child element to the parent element.
parentElement.appendChild(element);
标签:bsp can specific util string muti stat extc tag
原文地址:http://www.cnblogs.com/ppcoder/p/7147630.html