Java批量修改文件名称

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package cn.lg.file;import java.io.File;/** * 批量修改文件 * Created by L on 2017/3/13. */public class RenameFiles {    public static void main(String[] args) {        //文件夹目录        File fold = new File("/Users/L/Desktop/JAVA基础视频/day01/avi");        //列出文件夹从所有文件        File[] files = fold.listFiles();        for (File f:files) {            String oldName = f.getName();            //获得前缀            int index = oldName.indexOf("_");            String startName = oldName.substring(0,index+1);            //后缀名            int lastInt = oldName.lastIndexOf(".");            String endName = oldName.substring(lastInt,lastInt+4);            //中间名称            String midName;            int startMid = oldName.indexOf("(");            int endMId = oldName.indexOf(")");            if (startMid!=-1&&endMId!=-1){                midName = oldName.substring(startMid+1,endMId);            }else {                midName=oldName.substring(index+1,lastInt);            }            String newName = startName+midName+endName;            System.out.println(newName);            //重命名            File newFile = new File(fold,newName);            f.renameTo(newFile);        }    }}
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