java DOM4J 读取XML

最近学习Java，在处理XML文档的时候，查阅相关资料，发现了DOM4J这个jre库，相对C#的XML处理来说，功能还算是跟得上

下面展示一篇我自己写的一个XML读取测试

import java.util.Iterator;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import org.dom4j.*;
import org.dom4j.io.SAXReader;public class XmlRead {static StringBuilder sBuilder = new StringBuilder();public static void main(String[] args) throws IOException {BufferedReader bReader = new BufferedReader(new InputStreamReader(System.in));String path = null;System.out.println("请输入XML文件的绝对路径以及文件名:\n");path = bReader.readLine();sBuilder.append("开始输出XML文件内容\n");Document document = null;try {document = read(path);sBuilder.append(path + "\n");} catch (MalformedURLException e) {e.printStackTrace();} catch (DocumentException e) {e.printStackTrace();}Element root = getRootElement(document);if (root == null) {System.out.print("没有获取到root节点");return;}// 获取XML文档的编码格式String encString = document.getXMLEncoding();sBuilder.append("<?xml version=\"1.0\" encoding=\"" + encString+ "\">\n");sBuilder.append(elementText(root, attText(root), 0));System.out.println(getIterator(root, 0) + "</" + root.getName() + ">");}/*** 递归节点* * @description* @param element* @param lvl*            层级* @return*/private static String getIterator(Element element, int lvl) {lvl += 1;for (Iterator i = element.elementIterator(); i.hasNext();) {Element e = (Element) i.next();sBuilder.append(elementText(e, attText(e), lvl));getIterator(e, lvl);int count = e.nodeCount();if (count > 0) {for (int j = 0; j < lvl; j++) {sBuilder.append("    ");}}sBuilder.append("</" + e.getName() + ">\n");}return sBuilder.toString();}/*** 获取当前节点的属性的值的字符串* * @description* @param element*            当前节点* @return*/private static String attText(Element element) {String str = " ";for (int i = 0; i < element.attributeCount(); i++) {Attribute attribute = element.attribute(i);str += attribute.getName() + "=\"" + attribute.getValue() + "\" ";}return str;}/*** 获取当前Element的文本值* * @description* @param element*            当前Element节点* @param text*            属性值* @param lvl*            层级* @return*/private static String elementText(Element element, String text, int lvl) {String str = "";for (int i = 0; i < lvl; i++) {str += "    ";}str += "<" + element.getName();if (text != null && text != "") {str += text;}//由于dom4j里面没有 hasChild这个属性或者方法，所以要用nodeCount()这个方法来判断时候还有子节点int count = element.nodeCount();if (count == 0) {return str += ">";}return str += ">\n";}/*** * @description 读取XML文件* @param file*            XML文件路径，包含文件名* @return Document 文档* @throws MalformedURLException* @throws DocumentException*/public static Document read(String file) throws MalformedURLException,DocumentException {SAXReader reader = new SAXReader();Document document = reader.read(new File(file));return document;}/*** 获取Document文档的root节点* * @param document* @return*/public static Element getRootElement(Document document) {return document.getRootElement();}}