测试在xml节点后增加一个节点

   1. import java.util.*; 
   2. import org.dom4j.*; 
   3.  
   4. public class testxml { 
   5.  
   6.     public static void main(String[] args) { 
   7.         String xml =  
   8.             " <file>                                " +  
   9.             "     <chapter id=\"1\" name=\"a\"/>    " + 
  10.             "     <chapter id=\"2\" name=\"b\"/>    " + 
  11.             "     <chapter id=\"3\" name=\"c\"/>    " + 
  12.             "     <chapter id=\"4\" name=\"d\"/>    " + 
  13.             "  </file> "                            ; 
  14.         try { 
  15.             //生产doc文档 
  16.             Document doc = DocumentHelper.parseText(xml); 
  17.             //得到根节点 
  18.             Element root = doc.getRootElement(); 
  19.             //得到根节点下的chapter节点 
  20.             List elements = root.elements("chapter"); 
  21.             //遍历chapter节点 
  22.             Iterator iterator = elements.iterator();         
  23.             while(iterator.hasNext()){ 
  24.                 Element e = (Element)iterator.next(); 
  25.                 String id = e.attributeValue("id"); 
  26.                 //如果id==1 则添加新的节点 
  27.                 if("1".equals(id) || "1" == id){ 
  28.                     //新添加的节点 
  29.                     Element enew = e.addElement("chapterNew"); 
  30.                     //添加属性和值 
  31.                     enew.addAttribute("id", "1.1"); 
  32.                     enew.addAttribute("name", "a.1"); 
  33.                 } 
  34.             } 
  35.             //打印 
  36.             System.out.println(doc.asXML()); 
  37.         } catch (DocumentException e) { 
  38.             e.printStackTrace(); 
  39.         } 
  40.     } 
  41. }