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);

        }
    }


}