应用dom4j解析xml文件

使用dom4j解析xml文件
根据需要，需要将中国境内的省市区描述的xml文件根据省市区分出两层，分别为省描述文件和市描述文件。

package xml;

import java.io.File;
import java.io.FileOutputStream;
import java.util.Iterator;

import org.apache.log4j.Logger;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

public class Dom4J {
public static Logger logger = Logger.getLogger(Dom4J.class);

public static void main(String[] args) throws Exception {

//读取省市关系描述文件
  File file = new File("D:" + File.separator + "xml" + File.separator
    + "province_city.xml");
  logger.info(file.length());
  SAXReader reader = new SAXReader();
  Document document = reader.read(file);
  Element root = document.getRootElement();
  Iterator iterator = root.elementIterator();
  while (iterator.hasNext()) {
   Element province = (Element) iterator.next();
   logger.info(province.attributeValue("code") + ":"
     + province.attributeValue("value"));
   File pfile = new File("D:" + File.separator + "xml"
     + file.separator + "file" + File.separator
     + "c"+province.attributeValue("code") + ".txt");
   pfile.createNewFile();

//省描述文件输出流
   FileOutputStream fos = new FileOutputStream(pfile);
   StringBuffer sb = new StringBuffer("[");
   Iterator cityIterator = province.elementIterator();
   while (cityIterator.hasNext()) {
    Element city = (Element) cityIterator.next();
    logger.info(city.attributeValue("code") + ":"
      + city.attributeValue("value"));
    sb.append("{"text":"" + city.attributeValue("value")
      + "",code:" + """ + city.attributeValue("code")
      + ""},");
    File cfile = new File("D:" + File.separator + "xml"
      + file.separator + "file" + File.separator
      + city.attributeValue("code") + ".txt");
    cfile.createNewFile();
    Iterator contryIterator = city.elementIterator();
    StringBuffer citySb = new StringBuffer("[");
    while (contryIterator.hasNext()) {
     Element contry = (Element) contryIterator.next();
     citySb.append("{"text":""
       + contry.attributeValue("value") + "",code:"
       + """ + contry.attributeValue("code") + ""},");
     logger.info(contry.attributeValue("code") + ":"
       + contry.attributeValue("value"));
    }

//市描述文件输出流
    FileOutputStream contryFos = new FileOutputStream(cfile);
    contryFos
      .write((citySb.substring(0, citySb.length() - 1) + "]")
        .getBytes());
    contryFos.close();

   }
   if (province.elements().size() > 0) {
    fos.write((sb.substring(0, sb.length() - 1) + "]").getBytes());
    fos.close();
   }
  }
}

}