廢話不多說，直接上代碼
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package com.cn.shop.util;import java.io.File;import java.io.FileOutputStream;import java.io.OutputStreamWriter;import java.util.Iterator;import java.util.List;import org.dom4j.Attribute;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.DocumentHelper;import org.dom4j.Element;import org.dom4j.io.OutputFormat;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;/*** * @author NH**/public class XmlUtils {public static Document getDocument() {// 1.讀取xml文件獲取document對(duì)象SAXReader reader = new SAXReader();Document document = null;try {document = reader.read("D:\\itext\\27663.xml");} catch (DocumentException e) {// TODO Auto-generated catch blocke.printStackTrace();}// 2.通過解析xml的文本/** String xmlFilePath = "D:\\itext\\27663.xml"; try { document =* DocumentHelper.parseText(xmlFilePath); } catch (DocumentException e)* { // TODO Auto-generated catch block e.printStackTrace(); } // 3.通過* Document document = DocumentHelper.createDocument(); Element root =* document.addElement("csdn");*/return document;}public static void anaXml() throws Exception {// 讀取xml的文本內(nèi)容來創(chuàng)建document對(duì)象SAXReader reader = new SAXReader();try {Document document = reader.read("D:\\itext\\27663.xml");Element root = document.getRootElement();System.out.println(root.getName());getElement(root);/* elementMethod(root); *//** // 獲取一個(gè)節(jié)點(diǎn) Element element = root.element("title");* * * //獲取element的id屬性節(jié)點(diǎn)對(duì)象 Attribute attr = element.attribute("id");* //刪除屬性 element.remove(attr);* * // 添加新屬性 element.addAttribute("author", "作者");* * // 添加新的節(jié)點(diǎn) Element newElement = root.addElement("where"); //* 設(shè)定新節(jié)點(diǎn)的值 newElement.setText("北京人民出版社，天津人民大學(xué)出版社");* * // 獲取element中的where元素節(jié)點(diǎn)對(duì)象 Element author =* element.element("where"); // 刪除元素節(jié)點(diǎn) boolean flag =* element.remove(author); // 返回true代碼刪除成功，否則失敗* System.out.println(flag); // 添加CDATA區(qū)域* element.addCDATA("紅樓夢，是一部愛情小說."); // 寫入到一個(gè)新的文件中 writer(document);*/} catch (DocumentException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/** * 所有節(jié)點(diǎn)內(nèi)容*/public static void getElement(Element root) {// 獲取當(dāng)前節(jié)點(diǎn)的所有屬性節(jié)點(diǎn)List<Attribute> as = root.attributes();for (Attribute a : as) {System.out.println("當(dāng)前屬性節(jié)點(diǎn)的名稱:" + a.getName());/** System.out.println("當(dāng)前屬性節(jié)點(diǎn)的內(nèi)容：" + a.getText());* * System.out.println("當(dāng)前屬性節(jié)點(diǎn)的值:" + a.getValue());*/}if (!root.getTextTrim().equals("")) {System.out.println("文本內(nèi)容：：：：" + root.getText());}Iterator<Element> el = root.elementIterator();while (el.hasNext()) {// 獲取某個(gè)子節(jié)點(diǎn)對(duì)象Element e = el.next();// 對(duì)子節(jié)點(diǎn)進(jìn)行遍歷getElement(e);}}/*** 介紹Element中的element方法和elements方法的使用* * @param node*/public static void elementMethod(Element node) {// 獲取node節(jié)點(diǎn)中，子節(jié)點(diǎn)的元素名稱為西游記的元素節(jié)點(diǎn)。Element e = node.element("info");// 獲取西游記元素節(jié)點(diǎn)中，子節(jié)點(diǎn)為chapter的元素節(jié)點(diǎn)(可以看到只能獲取第一個(gè)作者元素節(jié)點(diǎn))Element author = e.element("classification");System.out.println(e.getName() + "----" + author.getText());// 獲取西游記這個(gè)元素節(jié)點(diǎn) 中，所有子節(jié)點(diǎn)名稱為classification元素的節(jié)點(diǎn) 。List<Element> authors = e.elements("classification");for (Element aut : authors) {System.out.println(aut.getText());}// 獲取西游記這個(gè)元素節(jié)點(diǎn) 所有元素的子節(jié)點(diǎn)。List<Element> elements = e.elements();for (Element el : elements) {System.out.println(el.getText());}}/*** 把document對(duì)象寫入新的文件* * @param document* @throws Exception*/public static void writer(Document document) throws Exception {// 緊湊的格式// OutputFormat format = OutputFormat.createCompactFormat();// 排版縮進(jìn)的格式OutputFormat format = OutputFormat.createPrettyPrint();// 設(shè)置編碼format.setEncoding("UTF-8");// 創(chuàng)建XMLWriter對(duì)象,指定了寫出文件及編碼格式/** XMLWriter writer = new XMLWriter(new OutputStreamWriter(new* FileOutputStream(new File("src//a.xml")), "UTF-8"), format);*/File file = new File("c://index//大主宰.xml");FileOutputStream fos = new FileOutputStream(file);OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");XMLWriter writer = new XMLWriter(osw);// 寫入writer.write(document);// 立即寫入writer.flush();// 關(guān)閉操作writer.close();}// 以下的代碼為字符串與xml互轉(zhuǎn)實(shí)例public void test() throws Exception {// 創(chuàng)建saxreader對(duì)象SAXReader reader = new SAXReader();// 讀取一個(gè)文件，把這個(gè)文件轉(zhuǎn)換成Document對(duì)象Document document = reader.read(new File("src//c.xml"));// 獲取根元素Element root = document.getRootElement();// 把文檔轉(zhuǎn)換字符串String docXmlText = document.asXML();System.out.println(docXmlText);System.out.println("---------------------------");// csdn元素標(biāo)簽根轉(zhuǎn)換的內(nèi)容String rootXmlText = root.asXML();System.out.println(rootXmlText);System.out.println("---------------------------");// 獲取java元素標(biāo)簽 內(nèi)的內(nèi)容Element e = root.element("java");System.out.println(e.asXML());}/*** 創(chuàng)建一個(gè)document對(duì)象 往document對(duì)象中添加節(jié)點(diǎn)元素 轉(zhuǎn)存為xml文件* * @throws Exception*/public void test2() throws Exception {Document document = DocumentHelper.createDocument();// 創(chuàng)建根節(jié)點(diǎn)Element root = document.addElement("csdn");Element java = root.addElement("java");java.setText("java班");Element ios = root.addElement("ios");ios.setText("ios班");writer(document);}/*** 把一個(gè)文本字符串轉(zhuǎn)換Document對(duì)象* * @throws Exception*/public void test1() throws Exception {String text = "<csdn><java>Java班</java><net>Net班</net></csdn>";Document document = DocumentHelper.parseText(text);Element e = document.getRootElement();System.out.println(e.getName());writer(document);}/*** 把document對(duì)象寫入新的文件* * @param document* @throws Exception*/public void writer1(Document document) throws Exception {// 緊湊的格式// OutputFormat format = OutputFormat.createCompactFormat();// 排版縮進(jìn)的格式OutputFormat format = OutputFormat.createPrettyPrint();// 設(shè)置編碼format.setEncoding("UTF-8");// 創(chuàng)建XMLWriter對(duì)象,指定了寫出文件及編碼格式// XMLWriter writer = new XMLWriter(new FileWriter(new// File("src//a.xml")),format);XMLWriter writer = new XMLWriter(new OutputStreamWriter(new FileOutputStream(new File("src//c.xml")), "UTF-8"),format);// 寫入writer.write(document);// 立即寫入writer.flush();// 關(guān)閉操作writer.close();}public static void main(String[] args) {try {anaXml();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}} |
以上這篇dom4j操作xml的demo(分享)就是小編分享給大家的全部內(nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持服務(wù)器之家。
