DOM4J基本应用

DOM4J基本应用

本文章采用MyEclipse6.5工具，在网上找的其他朋友的资料写的，互相交流与学习。采用开发jar包dom4j-1.6.1.jar、jaxen-1.1-beta-6.jar和jUnit4. 希望结交广大软件开发的朋友，我的qq：493162704

 

package dom4j.begin; import java.io.File; import java.util.Iterator; import java.util.List; import org.dom4j.Attribute; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Element; import org.dom4j.Node; import org.dom4j.io.SAXReader; public class Dom4jUtil { /** * 从文件读取xml，输入文件名，返回xml文档 * @param fileName 文件路径名 eg:c:/bean/bean.xml * @return xml文档 * @throws DocumentException 文档异常 */ public static Document read(String fileName) throws DocumentException{ SAXReader reader = new SAXReader(); Document document = reader.read(new File(fileName)); return document; } /** * 获取根节点 * @param doc xml文档 * @return 根节点 */ public static Element getRootElement(Document doc){ return doc.getRootElement(); } /** * 根据枚举的形式 遍历根节点下的所有子节点 * @param fileName 文件名 * @throws DocumentException */ @SuppressWarnings("unchecked") public static void traversalAllNodeByEnumerate(String fileName) throws DocumentException{ SAXReader reader = new SAXReader(); Document doc = reader.read(new File(fileName)); Element root = doc.getRootElement(); for(Iterator i=root.elementIterator();i.hasNext();){ Element element = (Element) i.next(); System.out.println(element.getName()); } } /** * 根据枚举的形式 遍历根节点下指定节点 * @param fileName * @param nodeName * @throws DocumentException */ @SuppressWarnings("unchecked") public static void traversalAllNodeByEnumerateAndNode(String fileName,String nodeName) throws DocumentException{ SAXReader reader = new SAXReader(); Document doc = reader.read(new File(fileName)); Element root = doc.getRootElement(); for(Iterator i=root.elementIterator(nodeName);i.hasNext();){ Element element = (Element)i.next(); System.out.println(element.getName()); } } /** * 根据枚举的形式 遍历根节点下指定节点的属性 * @param fileName * @param nodeName * @throws DocumentException */ @SuppressWarnings("unchecked") public static void traversalAllAttributeByEnumerateAndNode(String fileName,String nodeName) throws DocumentException{ SAXReader reader = new SAXReader(); Document doc = reader.read(new File(fileName)); Element root = doc.getRootElement(); for(Iterator i=root.attributeIterator();i.hasNext();){ Attribute attr =(Attribute)i.next(); System.out.println(attr.getName()); } } /** * 递归遍历根节点下的所有节点 * @param fileName * @throws DocumentException */ public static void recursionAllElement(String fileName) throws DocumentException{ SAXReader reader = new SAXReader(); Document doc = reader.read(new File(fileName)); Element root = doc.getRootElement(); recursionAllElement(root); } /** * 递归遍历根节点下的所有节点 * @param element */ public static void recursionAllElement(Element element){ for(int i =0 ;i<element.nodeCount();i++){ Node node = element.node(i); if(node instanceof Element){ System.out.println(((Element)node).getName()); recursionAllElement((Element)node); } } } /** * dom4j对xpath的支持 * @param fileName * @throws DocumentException */ @SuppressWarnings("unchecked") public static void getElementByXpath(String fileName) throws DocumentException{ SAXReader reader = new SAXReader(); Document doc = reader.read(new File(fileName)); List list = doc.selectNodes("//@id"); for (int i = 0; i < list.size(); i++) { Node list_sub = (Node)list.get(i); System.out.println(list_sub.getName()); } List list2 = doc.selectNodes("/beans/bean"); for (int i = 0; i < list2.size(); i++) { Node list_sub = (Node)list2.get(i); System.out.println(list_sub.getName()); } } @SuppressWarnings("unchecked") public static void findXhtmlLinks(String fileName) throws DocumentException{ SAXReader reader = new SAXReader(); Document doc = reader.read(new File(fileName)); List list = doc.selectNodes("//a/@href"); System.out.println(list.size()); for(Iterator i = list.iterator();i.hasNext();){ Attribute attr =(Attribute)i.next(); String url = attr.getValue(); System.out.println(url); } } }

 

 

package dom4j.begin; import org.dom4j.Attribute; import org.dom4j.CDATA; import org.dom4j.Comment; import org.dom4j.Document; import org.dom4j.DocumentType; import org.dom4j.Element; import org.dom4j.Entity; import org.dom4j.Namespace; import org.dom4j.ProcessingInstruction; import org.dom4j.Text; import org.dom4j.VisitorSupport; /** * 调用： root.accept(new MyVisitor()) * @author yanjia * */ public class MyVisitor extends VisitorSupport { @Override public void visit(Attribute node) { // TODO Auto-generated method stub System.out.println(node.getName()); } @Override public void visit(CDATA node) { // TODO Auto-generated method stub super.visit(node); } @Override public void visit(Comment node) { // TODO Auto-generated method stub super.visit(node); } @Override public void visit(Document document) { // TODO Auto-generated method stub super.visit(document); } @Override public void visit(DocumentType documentType) { // TODO Auto-generated method stub super.visit(documentType); } @Override public void visit(Element node) { System.out.println(node.getName()); } @Override public void visit(Entity node) { // TODO Auto-generated method stub super.visit(node); } @Override public void visit(Namespace namespace) { // TODO Auto-generated method stub super.visit(namespace); } @Override public void visit(ProcessingInstruction node) { // TODO Auto-generated method stub super.visit(node); } @Override public void visit(Text node) { // TODO Auto-generated method stub super.visit(node); } }

 

 

package dom4j.begin; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Element; import org.junit.BeforeClass; import org.junit.Test; public class Dom4jUtilTest { @BeforeClass public static void setUpBeforeClass() throws Exception { } @Test public void testRead() { try { System.out.println(Dom4jUtil.read("D://workspace//MyEclipse_j2e//dom4j//conf//bean.xml").getName()); } catch (DocumentException e) { e.printStackTrace(); } } @Test public void testGetRootElement(){ try { Document doc = Dom4jUtil.read("D://workspace//MyEclipse_j2e//dom4j//conf//bean.xml"); System.out.println(Dom4jUtil.getRootElement(doc).getName()); } catch (DocumentException e) { e.printStackTrace(); } } @Test public void testTraversalAllNodeByEnumerate(){ try { Dom4jUtil.traversalAllNodeByEnumerate("D://workspace//MyEclipse_j2e//dom4j//conf//bean.xml"); } catch (DocumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } } @Test public void testTraversalAllNodeByEnumerateAndNode() throws DocumentException{ Dom4jUtil.traversalAllNodeByEnumerateAndNode("D://workspace//MyEclipse_j2e//dom4j//conf//bean.xml", "bean"); } @Test public void testTraversalAllAttributeByEnumerateAndNode() throws DocumentException{ Dom4jUtil.traversalAllAttributeByEnumerateAndNode("D://workspace//MyEclipse_j2e//dom4j//conf//bean.xml", "bean"); } @Test public void testRecursionAllElement() throws DocumentException{ Dom4jUtil.recursionAllElement("D://workspace//MyEclipse_j2e//dom4j//conf//bean.xml"); } @Test public void testVisitor() throws DocumentException{ Document doc = Dom4jUtil.read("D://workspace//MyEclipse_j2e//dom4j//conf//bean.xml"); Element root = Dom4jUtil.getRootElement(doc); root.accept(new MyVisitor()); } @Test public void testGetElementByXpath() throws DocumentException{ Dom4jUtil.getElementByXpath("D://workspace//MyEclipse_j2e//dom4j//conf//bean.xml"); } @Test public void testFindXhtmlLinks() throws DocumentException{ Dom4jUtil.findXhtmlLinks("D://workspace//MyEclipse_j2e//dom4j//conf//bean.xml"); } }