public  void visitAll(Element root, Element child){
// 枚举所有子节点
for ( Iterator i = root.elementIterator(); i.hasNext(); ) {
Element element = (Element) i.next();
System.out.println(stringTrim(element.getText()));
if(this.stringTrim(element.getTextTrim()).equals("")){
return;
} 
else {
Element tmp = child.addElement("city");
visitAll(element, tmp);
}
}
}

public  void visitAll(Element root, Element child){
// 枚举所有子节点
for ( Iterator i = root.elementIterator(); i.hasNext(); ) {
Element element = (Element) i.next();      
Iterator j = element.elementIterator();
Element tmpElement = (Element)j.next();
if(!(stringTrim(tmpElement.getTextTrim()).equals("城市名")))
{
Element tmp = child.addElement("city");
tmp.addAttribute("name", 
stringTrim(tmpElement.getTextTrim()).trim());
tmpElement = (Element)j.next();
tmp.addAttribute("longitude", 
stringTrim(tmpElement.getTextTrim()).trim());
tmpElement = (Element)j.next();
tmp.addAttribute("latitude", 
stringTrim(tmpElement.getTextTrim()).trim());
}
}
}

public void createXMLFile(String filename) throws Exception{
//使用辅助方法创建文档对象
Document res = DocumentHelper.createDocument();
//添加文档跟结点country
Element rootElement = res.addElement("country");
//给根节点添加属性name，值为"中国"
rootElement.addAttribute("name", "中国");
//打开目录
File file = new File("G:\\workspace\\jwd\\jwd");
//打开目录下所有的xml文档
File[] files = file.listFiles();
//依次操作每个xml文档
for(int i = 0; i < files.length; i ++){
//获取文件名，去掉文件扩展名
String[] name = files[i].getName().split("\\.");
//在根结点下添加子节点province
Element childElement = rootElement.addElement("province");
//添加属性name，值为文件名
childElement.addAttribute("name", name[0].trim());
//创建reader
SAXReader reader = new SAXReader();
//根据实际情况设置编码
reader.setEncoding("GBK");
Document doc = reader.read(files[i]);
//获得xml文档的根节点
Element root = doc.getRootElement();
//遍历所有的结点
this.visitAll(root, childElement);
}
//格式化即将输出的xml，让它看起来整齐点
OutputFormat format = OutputFormat.createPrettyPrint();
/*将document中的内容写入文件中 */
XMLWriter writer = new XMLWriter(new FileWriter(new File(filename)),format);
writer.write(res);
writer.close(); 
}

import java.io.File;
import java.io.FileWriter;
import java.util.Iterator;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
/**
 * @author canvas
 *
 */
public class GIS {
public void createXMLFile(String filename) throws Exception{
//使用辅助方法创建文档对象
Document res = DocumentHelper.createDocument();
//添加文档跟结点country
Element rootElement = res.addElement("country");
//给根节点添加属性name，值为"中国"
rootElement.addAttribute("name", "中国");
//打开目录
File file = new File("G:\\workspace\\jwd\\jwd");
//打开目录下所有的xml文档
File[] files = file.listFiles();
//依次操作每个xml文档
for(int i = 0; i < files.length; i ++){
//获取文件名，去掉文件扩展名
String[] name = files[i].getName().split("\\.");
//在根结点下添加子节点province
Element childElement = rootElement.addElement("province");
//添加属性name，值为文件名
childElement.addAttribute("name", name[0].trim());
//创建reader
SAXReader reader = new SAXReader();
//根据实际情况设置编码
reader.setEncoding("GBK");
Document doc = reader.read(files[i]);
//获得xml文档的根节点
Element root = doc.getRootElement();
//遍历所有的结点
this.visitAll(root, childElement);
}
//格式化即将输出的xml，让它看起来整齐点
OutputFormat format = OutputFormat.createPrettyPrint();
/*将document中的内容写入文件中 */
XMLWriter writer = new XMLWriter(new FileWriter(new File(filename)),format);
writer.write(res);
writer.close(); 
}
public  void visitAll(Element root, Element child){
// 枚举所有子节点
for ( Iterator i = root.elementIterator(); i.hasNext(); ) {
Element element = (Element) i.next();
//System.out.println(stringTrim(element.getText()));
/*if(this.stringTrim(element.getTextTrim()).equals("")){
               return;
           } 
           else {
                Element tmp = child.addElement("city");
                visitAll(element, tmp);
           }*/
Iterator j = element.elementIterator();
Element tmpElement = (Element)j.next();
if(!(stringTrim(tmpElement.getTextTrim()).equals("城市名")))
{
Element tmp = child.addElement("city");
tmp.addAttribute("name", 
stringTrim(tmpElement.getTextTrim()).trim());
tmpElement = (Element)j.next();
tmp.addAttribute("longitude", 
stringTrim(tmpElement.getTextTrim()).trim());
tmpElement = (Element)j.next();
tmp.addAttribute("latitude", 
stringTrim(tmpElement.getTextTrim()).trim());
}
}
}
public String stringTrim(String str){
//去掉空格和全角空格
String[] tmp = str.split("\\s| ");
StringBuffer sb = new StringBuffer();
for(int i = 0; i < tmp.length; i ++){
sb.append(tmp[i].trim());
}
return sb.toString();
}
/**
     * @param args
     */
public static void main(String[] args) {
try {
new GIS().createXMLFile("d:\\GI-China.xml");
} catch (Exception e) {
e.printStackTrace();
}
}
}

<?xml version="1.0" encoding="UTF-8"?>
<country name="中国">
  <province name="上海">
    <city name="上海" longitude="121.48" latitude="31.22"/>
    <city name="嘉定" longitude="121.24" latitude="31.4"/>
    <city name="宝山" longitude="121.48" latitude="31.41"/>
    <city name="川沙" longitude="121.7" latitude="31.19"/>
    <city name="南汇" longitude="121.76" latitude="31.05"/>
    <city name="奉贤" longitude="121.46" latitude="30.92"/>
    <city name="松江" longitude="121.24" latitude="31"/>
    <city name="金山" longitude="121.16" latitude="30.89"/>
    <city name="青浦" longitude="121.1" latitude="31.15"/>
    <city name="崇明" longitude="121.4" latitude="31.73"/>
  </province>
  <province name="云南">
    <city name="昆明" longitude="102.73" latitude="25.04"/>
    <city name="富民" longitude="102.48" latitude="25.21"/>
    <city name="晋宁" longitude="102.58" latitude="24.68"/>
    <city name="呈贡" longitude="102.79" latitude="24.9"/>
    <city name="安宁" longitude="102.44" latitude="24.95"/>
    <city name="昭通" longitude="103.7" latitude="29.32"/>
    <city name="永善" longitude="103.63" latitude="28.22"/>
    <city name="大关" longitude="103.91" latitude="27.74"/>
    <city name="彝良" longitude="104.06" latitude="27.61"/>
    <city name="鲁甸" longitude="103.54" latitude="27.21"/>
    <city name="绥江" longitude="103.97" latitude="28.58"/>