我写的几个dom4j的入门例子.rar

package com.lovo.xml.dom4j; import java.io.BufferedWriter; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.util.Iterator; import org.dom4j.Attribute; import org.dom4j.Document; import org.dom4j.DocumentHelper; import org.dom4j.Element; import org.dom4j.Node; import org.dom4j.io.OutputFormat; import org.dom4j.io.SAXReader; import org.dom4j.io.XMLWriter; public class Test1 { public Document read(String fileName) throws Exception { SAXReader reader = new SAXReader(); // DOMReader reader = new DOMReader(); Document document = reader.read(new File(fileName)); return document; } /** * 循环所有子节点 */ public void printAll(Document doc) { Element root = doc.getRootElement(); for (Iterator i = root.elementIterator(); i.hasNext();) { Element ele = (Element) i.next(); System.out.print("no:" + ele.elementText("no")); System.out.println(" addr:" + ele.elementText("addr")); printAllAttribute(ele); } } /** * 循环指定名称子节点 */ public void printAll(Document doc, String nodeName) { Element root = doc.getRootElement(); Element ele; for (Iterator i = root.elementIterator(nodeName); i.hasNext();) { ele = (Element) i.next(); System.out.print("no:" + ele.elementText("no")); System.out.println(" addr:" + ele.elementText("addr") ); printAllAttribute(ele); } } /** * 打印所有子节点 */ public void printAllChildNode(Element element) { for (int i = 0, size = element.nodeCount(); i < size; i++) { Node node = element.node(i); if (node instanceof Element) { printAllChildNode((Element) node);// 递归 } else { // 其它处理 } } } /** * 打印节点的所有属性 */ public void printAllAttribute(Element ele){ for ( Iterator i = ele.attributeIterator(); i.hasNext(); ) { Attribute attribute = (Attribute) i.next(); System.out.println(attribute.getName()+" = "+attribute.getText()); } } public Document createDocument() { Document doc = DocumentHelper.createDocument(); Element root = doc.addElement("root"); for (int i = 0; i < 3; i++) { root.addElement("author" + i).addAttribute("age", "20" + i) .addText("Mike"); } return doc; } /** * 保存 */ public void saveXML(Document doc, String fileName) { FileWriter out; try { out = new FileWriter(fileName); doc.write(out); out.close(); } catch (IOException e) { e.printStackTrace(); } } /** * 保存(加入缓冲功能) */ public void saveXML2(Document doc, String fileName) { FileWriter out; BufferedWriter out2; try { out = new FileWriter(fileName); out2 = new BufferedWriter(out); doc.write(out2); out2.close(); } catch (IOException e) { e.printStackTrace(); } } public void formatXML(String oldFileName,String newFileName) throws Exception { //创建格式对象 OutputFormat format = OutputFormat.createPrettyPrint();// createCompactFormat format.setEncoding("GBK");//设置字符集 format.setIndentSize(4);//指定缩写尺寸 //创建输出文件流 FileWriter out = new FileWriter(newFileName); //关键：按指定格式,将格式化的结果输出到out流 XMLWriter writer = new XMLWriter(out, format); Document doc = this.read(oldFileName); writer.write(doc); out.close(); } public static void main(String[] args) { Test1 t1 = new Test1(); // try { // Document doc = t1.read("em.xml"); // t1.printAll(doc); // // } catch (Exception e) { // e.printStackTrace(); // } Document doc = t1.createDocument(); // t1.saveXML(doc, "ok.xml"); try { t1.formatXML("ok.xml","ok2.xml"); } catch (Exception e) { e.printStackTrace(); } } }