批量按要求修改文件名

下载flv文件出现重名，需要一个个改很是麻烦，有了程序就就可以批量搞定了，只需设置几个参数

import java.io.File;
import java.util.LinkedList;

public class ChangeFileName{
    private String fileDir;
    private String fileSuffix;
    private String filename;
    private String numstart;
    private String numend;
    private int volumeoffset=0;

    public static void main(String[] args) {
        long a = System.currentTimeMillis();
        ChangeFileName c =new ChangeFileName();
        c.setFileDir("F:\player\lyu");
        c.setFileSuffix(".mp4");
        c.setFilename("狼烟");
        c.setNumstart("(");
        c.setNumend(")");
        c.setVolumeoffset(0);
        c.getFileNameList(c);
        System.out.println("耗时"+(System.currentTimeMillis() - a)+" millisecond");
    }

    /**
     * 递归查找当前给定目录下符合条件的文件，并返回所有合适文件的路径链表。
     */
    public LinkedList<String> getFileNameList(ChangeFileName c) {
        String strPath=c.getFileDir();
        
        File dir = new File(strPath);
        File[] files = dir.listFiles();
        LinkedList<String> FileNames = new LinkedList<String>();
        String newFileName;
        if (files == null)
            return null;
        for (int i = 0; i < files.length; i++) {
            if (files[i].isDirectory()) {
                getFileNameList(c);
            } else {
                newFileName = doChangeFileName(files[i],c);
                if (newFileName != null) {
                    FileNames.add(newFileName);
                    System.out.println(newFileName);
                }
            }
        }
        return FileNames;
    }
    /**
     * 检测file是否符合cf所列条件，如符合则按cf所列条件改变文件名
     * @param file 
     * @param cf
     * @return
     */
    private String doChangeFileName(File file,ChangeFileName cf){
        String newfilename=cf.getFilename();
        String suffix=cf.getFileSuffix();
        String start=cf.getNumstart();
        String end=cf.getNumend();
        int offset=cf.getVolumeoffset();
        
        String filefullname = file.getAbsolutePath();
        int spritindex=filefullname.lastIndexOf("\");
        String filepath=filefullname.substring(0, spritindex+1);
        File newfile = file;
        if (filefullname.endsWith(suffix)) {
            int leftbracketindex=filefullname.indexOf(start)+1;
            int rightbracketindex=filefullname.indexOf(end);
            int volume=Integer.parseInt(filefullname.substring(leftbracketindex, rightbracketindex))+offset;
            String volumestr=addZero(volume);
            newfile=new File(filepath+newfilename+volumestr+suffix);
            file.renameTo(newfile);
        }
        return newfile.getAbsolutePath();
    }
    
    private String addZero(int volume){
        String volumeStr="";
        if(volume<10){
            volumeStr="0"+volume;
        }else{
            volumeStr=String.valueOf(volume);
        }
        return volumeStr;
    }
    
    //getter and setter
    public String getFileDir() {
        return fileDir;
    }

    public void setFileDir(String fileDir) {
        this.fileDir = fileDir;
    }

    public String getFileSuffix() {
        return fileSuffix;
    }

    public void setFileSuffix(String fileSuffix) {
        this.fileSuffix = fileSuffix;
    }

    public String getFilename() {
        return filename;
    }

    public void setFilename(String filename) {
        this.filename = filename;
    }

    public String getNumstart() {
        return numstart;
    }

    public void setNumstart(String numstart) {
        this.numstart = numstart;
    }

    public String getNumend() {
        return numend;
    }

    public void setNumend(String numend) {
        this.numend = numend;
    }

    public int getVolumeoffset() {
        return volumeoffset;
    }

    public void setVolumeoffset(int volumeoffset) {
        this.volumeoffset = volumeoffset;
    }

 
    
}