package com.gdapp.oa.app;    import java.io.File;  import java.io.FileOutputStream;  import java.io.FileWriter;  import java.io.IOException;  import java.util.Iterator;    import org.dom4j.Attribute;  import org.dom4j.Document;  import org.dom4j.DocumentException;  import org.dom4j.DocumentHelper;  import org.dom4j.Element;  import org.dom4j.Node;  import org.dom4j.io.OutputFormat;  import org.dom4j.io.SAXReader;  import org.dom4j.io.XMLWriter;    /**   * 对dom4j的操作，添加，修改，显示   * @author bicashy   *   */  public class Dom4jAPP  {   /**    * 写XML文件    * @param path    */   public void writeXML(String path)   {    try    {     FileWriter out = new FileWriter(path);     Document doc = createDocument();     write(doc,path);    } catch (IOException e)    {     // TODO Auto-generated catch block     e.printStackTrace();    }   }      /**    * 返回Document对象    * @param path    * @return    */   public Document readXML(String path)   {    Document doc = null;    try    {     SAXReader reader = new SAXReader();        doc = reader.read(path);         } catch (DocumentException e)    {     // TODO Auto-generated catch block     e.printStackTrace();    }    return doc;   }         public void displayXML(String path)   {    Document doc = readXML(path);    Element root = doc.getRootElement();        for(Iterator it = root.elementIterator();it.hasNext();)    {     Element e = (Element)it.next();     System.out.println("【内容=="+e.getText()+"】【  enjoy属性=="+e.attributeValue("enjoy")+"】");    }        //枚举名称为"bicashy"的节点       for ( Iterator i = root.elementIterator("bicashy"); i.hasNext();) {          Element foo = (Element) i.next();          System.out.println("【内容=="+foo.getText()+"】【  enjoy属性=="+foo.attributeValue("enjoy")+"】");       }              // 枚举"bicashy"节点下的属性       Element bicashy = root.element("bicashy");       for ( Iterator i = bicashy.attributeIterator(); i.hasNext(); ) {          Attribute attribute = (Attribute) i.next();          System.out.println("属性"+attribute.getName()+"=="+attribute.getText());       }         //枚举"child"节点下的属性       Element child = root.element("parent").element("child");       for ( Iterator i = child.attributeIterator(); i.hasNext(); ) {          Attribute attribute = (Attribute) i.next();          System.out.println("属性"+attribute.getName()+"=="+attribute.getText());       }   }      //修改xml文件(将“child”节点的属性“姓名”的值改为 “金刚”，将内容改为“我是谁？”)   public void modifyXML(String path)   {    try    {     SAXReader reader = new SAXReader();     Document doc = reader.read(path);     Element root = doc.getRootElement();     Element child = root.element("parent").element("child");     for ( Iterator i = child.attributeIterator(); i.hasNext(); )      {            Attribute attribute = (Attribute) i.next();            if(attribute.getName().equals("姓名"))            {             attribute.setText("金刚");            }     }     child.setText("我是谁？");     write(doc,path);         } catch (DocumentException e)    {     // TODO Auto-generated catch block     e.printStackTrace();    }   }      //递归   public void treeWalk(String path)   {    Document doc = readXML(path);    Element root = doc.getRootElement();       treeWalk(root);   }         public void treeWalk(Element element)      {          for (int i = 0, size = element.nodeCount(); i < size; i++)     {              Node node = element.node(i);              if (node instanceof Element) {                 treeWalk((Element) node);              } else               {               System.out.println("##"+"=="+node.getText());              }          }   }     /**    * 写入文件    * @param doc     文档对象    * @param outpath 文件路径    */   public void write(Document doc,String outpath)   {    XMLWriter writer = null;    try    {     writer = new XMLWriter(new FileOutputStream(new File(outpath)));     writer.write(doc);     writer.close();          //美化格式(优美格式)     OutputFormat format = OutputFormat.createPrettyPrint();// 定义文档的格式为美化型(pretty)     format.setEncoding("GBK");// 格式编码为“gbk”     writer = new XMLWriter(System.out,format );     writer.write(doc);     //缩进格式    //   format = OutputFormat.createCompactFormat();  //   writer = new XMLWriter(System.out,format);  //   writer.write(doc);    } catch (Exception e)    {     // TODO Auto-generated catch block     e.printStackTrace();    }   }      /*                 Best of you      III kill              WHO AM I?               */   public Document createDocument()   {    Document document = DocumentHelper.createDocument();    Element root = document.addElement("root");        Element bicashy1 =        root.addElement("bicashy")          .addAttribute("name", "wangpengfei")           .addAttribute("sex","male")          .addAttribute("enjoy", "computer")          .addText("Best of you");    Element bicashy2 =        root.addElement("ladybird")          .addAttribute("name", "dibowey")           .addAttribute("sex","male")          .addAttribute("enjoy", "muder")          .addText("III kill");    Element bicashy3 =        root.addElement("parent");    Element bicashy4 =          bicashy3.addElement("child")            .addAttribute("姓名", "毛孩")             .addAttribute("乳名","小屁孩")            .addText("WHO AM I?");    return document;   }      public static void main(String[] args)   {    Dom4jAPP app = new Dom4jAPP();    app.writeXML("e:/bicashy.xml");    app.displayXML("e:/bicashy.xml");    //app.modifyXML("e:/bicashy.xml");   }  }