Use Dom4J to Write XML file
2010-12-06 18:41
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package com.jadyer.util; import java.io.FileWriter; import java.io.IOException; import org.dom4j.Document; import org.dom4j.DocumentHelper; import org.dom4j.Element; import org.dom4j.io.OutputFormat; import org.dom4j.io.XMLWriter; /** * Use Dom4J to write a XML file * <users> * <!--This is a comment!--> * <user> * <id>1</id> * <name>Jadyer</name> * <age>24</age> * <address>BeiJing</address> * </user> * <user> * <id>2</id> * <name>Moon</name> * <age>23</age> * <address>HaerBin</address> * </user> * </users> */ public class TestDom4J { public static void main(String[] args) throws IOException { new TestDom4J().testXMLWrite(); } public void testXMLWrite() throws IOException { // Document对象代表整个xml文档 Document document = DocumentHelper.createDocument(); // rootElement代表文档根元素 Element rootElement = document.addElement("users"); // 增加一个注释 rootElement.addComment("This is a comment!"); // 增加一个<user>标签 Element userElement11 = rootElement.addElement("user"); // 设定不同的<user>下面的子标签 Element idElement11 = userElement11.addElement("id"); Element nameElement11 = userElement11.addElement("name"); Element ageElement11 = userElement11.addElement("age"); Element addressElement11 = userElement11.addElement("address"); // 为各个子标签赋值 idElement11.setText("1"); nameElement11.setText("Jadyer"); ageElement11.setText("24"); addressElement11.setText("BeiJing"); Element userElement22 = rootElement.addElement("user"); Element idElement22 = userElement22.addElement("id"); Element nameElement22 = userElement22.addElement("name"); Element ageElement22 = userElement22.addElement("age"); Element addressElement22 = userElement22.addElement("address"); idElement22.setText("2"); nameElement22.setText("Moon"); ageElement22.setText("23"); addressElement22.setText("HaerBin"); // 设定输出编码 OutputFormat format = OutputFormat.createPrettyPrint(); format.setEncoding("UTF-8"); // 通过org.dom4j.io.XMLWriter进行输出,将生成的XML文件写到D:/testXML.xml中 XMLWriter writer = new XMLWriter(new FileWriter("D:/testXML.xml"), format); writer.write(document); writer.close(); } } /**********【关于对XML文件的读和写】************************************/ //关于对XML文件的读和写有很多种实现方式,现在用的比较多的就是Dom4J和Jdom //相对而言,Dom4J在性能和效率上要比Jdom好一些,只是Dom4J比Jdom稍复杂一点 //包括JBoss的一些配置文件的读取,还有Hibernate等用的都是Dom4J //Jdom的优点是非常简单,在一般情况下用它读取配置文件是没有问题的 //而其它的XML实现,都要比Dom4J和Jdom复杂一些 //特别是SUN的javax.xml包中定义的一套标准,更复杂,特别难用 /**********【Dom4J和Jdom的使用对比】***********************************/ //二者对XML的处理方式几乎完全一样的,只是API有些细小的差别 //对于输出来说,二者都会生成Format对象,然后调用IO输出流 //二者都是使用Document、Element来表示整个XML文档和元素的 //二者在生成代表整个XML文档的Document对象时,略有不同 //Document doc = DocumentHelper.createDocument(); //Dom4J //Document doc = new Document(rootElement); //Jdom //二者在把一个Element增加到已有Element上时,略有不同 //Element e = root.addElement("hello"); //Dom4J //Element e = new Element("hello"); root.add(e);//Jdom /*******************************************************************/
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