DOM4J介绍
DOM4J是使用Java语言编写的,用于读写及操作XML的一套组件,DOM4J同时具有DOM修改文件的优点和SAX读取快速的优点。
DOM4J的使用
首先下载dom4j的JAR包,我用的版本是1.6.1,下载地址:http://download.csdn.net/detail/onroads/9721574
使用方法《使用JDOM操作XML》,链接:http://www.cnblogs.com/centor/p/6215082.html
另外,解压后用到dom4j01.6.1.jar文件,还有一个lib/jaxen-1.1-beta-6.jar文件,一般也需要引入,否则执行时可能抛出java.lang.NoClassDefFoundError:org/jaxen/JaxenException异常。DOM4J的主要接口如下:
使用DOM4J
生成xml例程:
1 package com.xml; 2 3 import java.io.File; 4 import java.io.FileOutputStream; 5 6 import org.dom4j.Attribute; 7 import org.dom4j.Document; 8 import org.dom4j.DocumentHelper; 9 import org.dom4j.Element; 10 import org.dom4j.io.OutputFormat; 11 import org.dom4j.io.XMLWriter; 12 13 14 public class XMLtest { 15 16 public static void main(String args[]) throws Exception { 17 18 String[] names = {"鸣人","佐助","小樱"}; 19 String[] emails = {"mingren@163.com","zuozhu@163.com","xiaoying@163.com"}; 20 String[] ids ={"H1","H2","H3"}; 21 22 Document doc = DocumentHelper.createDocument(); 23 Element addresslist = doc.addElement("addresslist"); 24 25 for (int i = 0; i < 3; i++) { 26 Element linkman = addresslist.addElement("linkman"); 27 Element name = linkman.addElement("name"); 28 Element email = linkman.addElement("email"); 29 name.setText(names[i]); 30 email.setText(emails[i]); 31 name.setAttributeValue("id", ids[i]); 32 } 33 34 OutputFormat format = OutputFormat.createPrettyPrint(); 35 format.setEncoding("GBK"); 36 try { 37 XMLWriter xmlWriter = new XMLWriter(new FileOutputStream("D:"+File.separator+"person.xml"), format); 38 xmlWriter.write(doc); 39 xmlWriter.close(); 40 } catch (Exception e) { 41 e.printStackTrace(); 42 } 43 } 44 }
生成的xml文件:
解析XML文件:
1 package com.xml; 2 3 import java.io.File; 4 import java.util.Iterator; 5 6 import org.dom4j.Document; 7 import org.dom4j.Element; 8 import org.dom4j.io.SAXReader; 9 10 public class XMLtest { 11 12 public static void main(String args[]) throws Exception { 13 14 File file = new File("D:"+File.separator+"person.xml"); 15 SAXReader reader = new SAXReader(); 16 Document doc = null; 17 try { 18 doc = reader.read(file); 19 20 } catch (Exception e) { 21 e.printStackTrace(); 22 } 23 24 Element root = doc.getRootElement(); 25 Iterator iterator = root.elementIterator(); 26 while(iterator.hasNext()){ 27 System.out.println("<linkman>"); 28 Element linkman = (Element) iterator.next(); 29 System.out.println(" <name id="+ linkman.element("name").attributeValue("id")+">"+linkman.elementText("name")+"</name>"); 30 System.out.println(" <email>"+linkman.elementText("email")+"</email>"); 31 System.out.println("</linkman>"); 32 } 33 } 34 }
解析结果: