使用Dom4j读取指定文件，并写入指定文件

导入dom4j的包，然后写入代码如下




package com.dom4j.cn;import java.io.FileOutputStream;import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import org.junit.Test;public class ChangeXML {/*** 把文件读取并且写到指定文件中* @throws Exception*/@Testpublic void  changeXML() throws Exception {Document document = new SAXReader().read("./src/test.xml");//修改属性iddocument.getRootElement().element("shaoxin").attribute("id").setValue("003");//删除属性id为002的节点Element element =(Element) document.getRootElement().elements().get(1);element.detach();FileOutputStream fileOutputStream = new FileOutputStream("C:/Users/shaoxin/Desktop/a.xml");OutputFormat outputFormat = new OutputFormat().createPrettyPrint();XMLWriter xmlWriter = new XMLWriter(fileOutputStream,outputFormat);outputFormat.setEncoding("utf-8");xmlWriter.write(document);fileOutputStream.close();}}

package com.dom4j.cn;import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
import org.junit.Test;public class Dom_ChangeXML {/*** 创建各个节点并且保存在指定文件中*/@Testpublic void changeXML() {Document document = DocumentHelper.createDocument();Element rootElement = document.addElement("people");Element shaoxin = rootElement.addElement("shaoxin");Element age = shaoxin.addElement("age");Element name = shaoxin.addElement("name");shaoxin.addAttribute("id", "001");age.addText("21");name.addText("邵欣");FileOutputStream fileOutputStream;try {fileOutputStream = new FileOutputStream("C:/Users/shaoxin/Desktop/a.xml");OutputFormat outputFormat = new OutputFormat().createPrettyPrint();outputFormat.setEncoding("utf-8");XMLWriter xmlWriter = new XMLWriter(fileOutputStream, outputFormat);xmlWriter.write(document);fileOutputStream.close();} catch (FileNotFoundException e) {// TODO Auto-generated catch block
            e.printStackTrace();} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch block
            e.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch block
            e.printStackTrace();}}}

package com.dom4j.cn;import java.io.File;
import java.util.Iterator;import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;public class Dom_XML {/*** 输出文件中所有的节点名称* @param args*/public static void main(String[] args) {SAXReader saxReader = new SAXReader();try {Document document = saxReader.read(new File("./src/test.xml"));Element element = document.getRootElement();sax(element);} catch (DocumentException e) {// TODO Auto-generated catch block
                e.printStackTrace();}}public static void sax(Element element) {System.out.println(element.getName());Iterator<Node> node = element.nodeIterator();while(node.hasNext()){Node node2 = node.next();if (node2 instanceof Element) {Element  element2 = (Element) node2;sax(element2);}}}
}