<CATIs>
           <CATI  seqno=”1”>
               <CTIF>
               <CTNM>客户名称</CTNM>
               <CITP>客户身份证件类型</CITP>
               </CTIF>
    </CATI>
           ………(循环CATI) 问题就在这里,做循环时属性值累加,但是元素不变,编译的时候没有问题,运行的时候报错:The Content already has an existing parent "CATI"
    </CATIs>
</HVTR>
*/

import java.io.*;
import org.jdom.*;
import org.jdom.input.*;
import org.jdom.input.*;
import org.jdom.output.*;
public class xmlwriter {    
public void writer() throws IOException,JDOMException {
     int i=1;
        Element root,r2,r3,r1,r4,r5;
        Document Doc;
        root = new Element("HVTR");
        Doc = new Document(root);
  root.addContent(new Comment("这是注释"));
  root.addContent(new Element("RBIF").addContent(new Element("RINM").addContent("报告机构名称")));
        r1 = new Element("CATIs");
        r2 = new Element("CATI");
  r3 = new Element("CTIF");
  r4 = new Element("CTNM");
  r5 = new Element("CITP");
  r4.addContent("客户名称");
  r5.addContent("客户身份证件类型");
  r3.addContent(r4);
  r3.addContent(r5);
       for(i=1;i<=10;i++){
  String num=Integer.toString(i);
  r2.addContent(r3).setAttribute("seqno", num);
    }
  r1.addContent(r2);
  root.addContent(r1);
   
  Format format = Format.getPrettyFormat();
        format.setEncoding("GB2312");
        XMLOutputter Outputter = new XMLOutputter();
        Outputter.setFormat(format);
        Outputter.output(Doc, new FileOutputStream("test1.xml"));
    }
    public static void main(String[] args) {
        try {
           xmlwriter s1 = new xmlwriter();
            System.out.println("Now we build an XML document .....");
            s1.writer();
        }
catch (Exception e) {
           System.out.println(e.getMessage());
        }
    }
}