挑選盤裏所有的相同後綴文件複製出來

package com.obcy;


import java.io.*;
import java.util.Scanner;

public class Search {
    private static Search search = new Search();
    private String source = "" ;
    private String target = "";
    private String type = "";

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        System.out.println("請輸入你要遍歷的目錄（絕對路徑）");
        search.source = sc.nextLine();
        System.out.println("請輸入你要挑選的文件類型（文件後綴名）");
        search.type = sc.nextLine();
        System.out.println("你要將這種類型的文件複製到哪（結對路徑）");
        search.target = sc.nextLine();
        System.out.println("startting");

        getAllPath(new File(search.source));
    }




    //此功能遍歷allpath集合，並把string對象拆分，取到所有的文件類型

    private static String getPathTail(String filename) {

        String[] split = filename.split("\\.");
        return  split[split.length-1];


    }

    //複製文件方法
    public void cp(String input,String output) throws IOException {


        File in = new File(input) ;
        File dir = new File(output);

        if(!dir.exists()){
            if(dir.mkdirs()){
                System.out.println("已創建目錄"+dir.getAbsolutePath());
            }else{
                System.out.println("目錄創建失敗");
                return;
            }
        }
        System.out.println(in.getName()+"正在複製");
        File out = new File(dir,in.getName());
        FileInputStream fin = new FileInputStream(in);
        FileOutputStream fout = new FileOutputStream(out);
        BufferedInputStream bfin = new BufferedInputStream(fin);
        BufferedOutputStream bfout = new BufferedOutputStream(fout);

        int len = 0;
        byte[] bt = new byte[4096];

        while ((len = fin.read(bt))!=-1){

            fout.write(bt,0,len-1);
        }
        System.out.println(in.getName()+"複製完成");

        fin.close();
        fout.close();
        bfin.close();
        bfout.close();


    }

    //遞歸遍歷到文件夾下所有的文件，並存儲到ArrayList數組內
    private static  void getAllPath(File path) {
        if (path.exists()) {         //判斷路徑是否存在

            if (path.isFile()) {         //判斷是不是文件，是的話，得到其文件名。不是的話，就是目錄
                String absolutePath = path.getAbsolutePath();
                String tail = getPathTail(absolutePath);
                //獲取文件類型
                if(search.type.equals(tail)){

                    try {
                        search.cp(absolutePath,search.target);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

                }

            }else{
                File[] files = path.listFiles();         //得到目錄下所有的Fiel列表
                if (files!=null) {                //如果目錄列表不爲零，遞歸操作此列表裏所有路徑
                    for (File file : files) {
                        getAllPath(file);
                    }
                }



            }
        }else{
            System.out.println("文件路徑不存在");
        }
    }

}