dom4j를 사용하여 Java에서 xml 구문 분석(샘플 코드)

    J K. Rowling    Erik T. Ray  

import java.io.File; import java.util.List; import org.dom4j.Attribute; import org.dom4j.Document; import org.dom4j.Element; import org.dom4j.io.SAXReader; public class Demo { public static void main(String[] args) throws Exception { SAXReader reader = new SAXReader(); File file = new File("books.xml"); Document document = reader.read(file); Element root = document.getRootElement(); List childElements = root.elements(); for (Element child : childElements) { //未知属性名情况下 /*List attributeList = child.attributes(); for (Attribute attr : attributeList) { System.out.println(attr.getName() + ": " + attr.getValue()); }*/ //已知属性名情况下 System.out.println("id: " + child.attributeValue("id")); //未知子元素名情况下 /*List elementList = child.elements(); for (Element ele : elementList) { System.out.println(ele.getName() + ": " + ele.getText()); } System.out.println();*/ //已知子元素名的情况下 System.out.println("title" + child.elementText("title")); System.out.println("author" + child.elementText("author")); //这行是为了格式化美观而存在 System.out.println(); } } }

import java.io.File; import java.util.Iterator; import org.dom4j.Attribute; import org.dom4j.Document; import org.dom4j.Element; import org.dom4j.io.SAXReader; public class Demo { public static void main(String[] args) throws Exception { SAXReader reader = new SAXReader(); Document document = reader.read(new File("books.xml")); Element root = document.getRootElement(); Iterator it = root.elementIterator(); while (it.hasNext()) { Element element = (Element) it.next(); //未知属性名称情况下 /*Iterator attrIt = element.attributeIterator(); while (attrIt.hasNext()) { Attribute a = (Attribute) attrIt.next(); System.out.println(a.getValue()); }*/ //已知属性名称情况下 System.out.println("id: " + element.attributeValue("id")); //未知元素名情况下 /*Iterator eleIt = element.elementIterator(); while (eleIt.hasNext()) { Element e = (Element) eleIt.next(); System.out.println(e.getName() + ": " + e.getText()); } System.out.println();*/ //已知元素名情况下 System.out.println("title: " + element.elementText("title")); System.out.println("author: " + element.elementText("author")); System.out.println(); } } }

import java.io.File; import java.io.FileOutputStream; import org.dom4j.Document; import org.dom4j.DocumentHelper; import org.dom4j.Element; import org.dom4j.io.OutputFormat; import org.dom4j.io.XMLWriter; public class Demo { public static void main(String[] args) throws Exception { Document doc = DocumentHelper.createDocument(); //增加根节点 Element books = doc.addElement("books"); //增加子元素 Element book1 = books.addElement("book"); Element title1 = book1.addElement("title"); Element author1 = book1.addElement("author"); Element book2 = books.addElement("book"); Element title2 = book2.addElement("title"); Element author2 = book2.addElement("author"); //为子节点添加属性 book1.addAttribute("id", "001"); //为元素添加内容 title1.setText("Harry Potter"); author1.setText("J K. Rowling"); book2.addAttribute("id", "002"); title2.setText("Learning XML"); author2.setText("Erik T. Ray"); //实例化输出格式对象 OutputFormat format = OutputFormat.createPrettyPrint(); //设置输出编码 format.setEncoding("UTF-8"); //创建需要写入的File对象 File file = new File("D:" + File.separator + "books.xml"); //生成XMLWriter对象，构造函数中的参数为需要输出的文件流和格式 XMLWriter writer = new XMLWriter(new FileOutputStream(file), format); //开始写入，write方法中包含上面创建的Document对象 writer.write(doc); } }