java文件复制（可过滤）

1.java将制定的后缀文件导出到另一个文件中，递归遍历某个文件夹下的所有文件

直接贴上代码

import java.io.*;

public class FileExport {/**
 * Created by Administrator on 2016/11/7 0007.
 */
    public static void main(String[] args){
        String path = "F:\\百度云盘\\Scala";
        traverseFolder2(path);

    }
    public static  void traverseFolder2(String path){
        File file = new File(path);
        if (file.exists()) {
            File[] files = file.listFiles();
            if (files.length == 0) {
                System.out.println("文件夹是空的!");
                return;
            } else {
                for (File file2 : files) {
                    if (file2.isDirectory()) {
                        //判断后缀是否是mp4，是的话导出即可
                        if(file2.getAbsolutePath().contains("mp4"))
                        {
                            String tempStr = file2.getAbsolutePath().split("\\\\")[file2.getAbsolutePath().split("\\\\").length - 1];
                            ExceptionDoing(file2.getAbsolutePath(),"C:\\Users\\Administrator\\Desktop\\scala视频\\" + tempStr);
                        }
                        traverseFolder2(file2.getAbsolutePath());
                    } else {
                        if(file2.getAbsolutePath().contains("mp4"))
                        {
                            String tempStr = file2.getAbsolutePath().split("\\\\")[file2.getAbsolutePath().split("\\\\").length - 1];
                            ExceptionDoing(file2.getAbsolutePath(),"C:\\Users\\Administrator\\Desktop\\scala视频\\" + tempStr);
                        }
                    }
                }
            }
        } else {
            System.out.println("文件不存在!");
        }
    }
    public static void ExceptionDoing(String sourceFile,String targetFile){
        try {
            BufferedInputStream bis = new BufferedInputStream(new FileInputStream(sourceFile));
            BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(targetFile));
            byte[] b = new byte[1024];
            int len  = 0;
            while((len = bis.read(b)) != - 1){
                bos.write(b,0,len);
                bos.flush();
            }
            bos.close();
            bis.close();
        }catch(Exception e){
            e.printStackTrace();
        }

    }
}