xml与jpg一对一映射的问题，如果jpg多余那么删了，并且将xml中的filename和path属性换成jpg的文件名和全路径

import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Element; import org.dom4j.io.SAXReader; import java.io.*; import java.util.ArrayList; import java.util.List; public class xmlAndJpg { public static void main(String[] args) throws DocumentException, IOException { String path = "F:\\testXMLAndJpg\\"; File file = new File(path); List<String> xml = new ArrayList(); List<String> jpg = new ArrayList(); if (file.isDirectory()){ System.out.println("文件夹"); String[] fileList = file.list(); for (int i = 0; i < fileList.length;i++){ File files = new File(path + "\\" + fileList[i]); if (files.getName().endsWith(".xml")){ xml.add(firstUtil(files.getName())); } if (files.getName().endsWith(".jpg")){ jpg.add(firstUtil(files.getName())); } } } Document read = null; for (int j = 0 ; j < jpg.size();j++) if (!xml.contains(jpg.get(j))) { File flag = new File(path + jpg.get(j) + ".jpg"); flag.delete(); } else { File flag1 = new File(path + jpg.get(j) + ".xml"); SAXReader saxReader = new SAXReader(); read = saxReader.read(flag1); Element rootElement = read.getRootElement(); List<Element> elementList = rootElement.elements(); for (Element element : elementList) { if (element.getName().equals("filename")) { System.out.println(element.getText()); element.setText(jpg.get(j)); } if (element.getName().equals("path")) { System.out.println(element.getText()); element.setText(path + jpg.get(j) + ".jpg"); } } FileOutputStream fileOutputStream = new FileOutputStream(flag1); BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(fileOutputStream, "utf-8")); read.write(bufferedWriter); bufferedWriter.flush(); bufferedWriter.close(); } } public static String firstUtil(String str){ return str.substring(0,str.indexOf(".")); } }