HelloWorld 善戰(zhàn)者,求之于勢,不責于人;故能擇人而任勢。

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

public class Updatel {
 private void doCycXml(Element element,List delList) {
  if (element == null)
   return;
  Iterator iter = element.elementIterator();
  Element temp = null;
  while (iter.hasNext()) {
   temp = (Element)iter.next();
   Attribute att = temp.attribute("name");
   if (att != null)
    for (int i = 0; i < delList.size(); i++) {
     if (att.getValue().equals((String)delList.get(i))) {
      temp.getParent().remove(temp);
      delList.remove(i);
      break;
     }
    }
   if (!element.elementIterator().hasNext()) {
    element.getParent().remove(element);
   }
   if (delList.size()==0) return;
   doCycXml(temp,delList);
  }
 }
 
 public void updateXml(String sourceXml,String updateFile,String destXml) throws Exception {
  FileInputStream fis = new FileInputStream(updateFile);
  InputStreamReader isr = new InputStreamReader(fis);
  BufferedReader br = new BufferedReader(isr);
  List delList = new ArrayList();
  String str = null;
  while ((str = br.readLine()) != null) {
   delList.add(str);
  }
  //如果沒有要刪除的
  if (delList.size() == 0) return;
  SAXReader reader = new SAXReader();
  //聲明文檔對象
  Document doc = null;
  //讀取XML文檔
  doc = reader.read(new File(sourceXml));
  //聲明跟元素
  Element root = doc.getRootElement();
  doCycXml(root,delList);
  fis.close();
  XMLWriter writer = null;
  OutputFormat format = OutputFormat.createPrettyPrint();
  // 格式編碼為“utf-8”
  format.setEncoding("utf-8");
  writer = new XMLWriter(new FileOutputStream(new File(destXml)), format);
  writer.write(doc);// 寫XML文檔
  writer.close();// 關閉輸出流
 }
 
 public static void main(String args[])  throws Exception {
  Update u  = new Updatel();
  u.updateXml("×××", "×××", "×××");
 }
}

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