IO练习 两个文件夹进行copy（含子目录）

//从键盘接收两个文件夹路径,把其中一个文件夹中(包含内容)拷贝到另一个文件夹中
    @Test
    public void t6(){
        //1) 接受两个文件夹路径
            //1.创建一个 字符缓冲流
           
            BufferedReader br = null; 
            try {
                br = new BufferedReader(new InputStreamReader(System.in));
                System.out.println("请输入第一个文件夹路径");
                //2.读取2行字符串
                String str1 = br.readLine();
                System.out.println("请输入第二个文件夹路径");
                String str2 = br.readLine();
                File file1 = new File(str1);
                File file2 = new File(str2);
                file2.mkdir();
                File[] listFiles = file1.listFiles();
                for(int i=0;i<listFiles.length;i++){
                    if(listFiles[i].isFile()){
                        File target = new File(file2, listFiles[i].getName());
                        copyFile(listFiles[i], target);
                    }
                     if(listFiles[i].isDirectory()){
                            //文件夹下面还是个文件夹,这个时候去拿到文件夹的路径
                            String source1 = str1+File.separator+listFiles[i].getName();
                            String target1 = str2+File.separator+listFiles[i].getName();
                            copyDir(source1,target1);
                        }
                }
     
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }finally{
                try {
                    br.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
    }
    private void copyDir(String source1, String target1) throws IOException {
         File source = new File(source1);
         File target = new File(target1);
         target.mkdirs();
         File[] files = source.listFiles();
         for(int a=0;a<files.length;a++){
             if(files[a].isFile()){
                 File target2 = new File(target,files[a].getName());
                 copyFile(files[a], target2);
             }
             if(files[a].isDirectory()){
                 String source3 = source1 +File.separator + files[a].getName();
                 String target3 = target1 +File.separator + files[a].getName();
                 //递归,对还是文件夹的文件夹在调用copyDir的方法,上面的if条件是递归的出口
                 copyDir(source3,target3);
             }
         }
    }
    private void copyFile(File file, File target) throws IOException {
         BufferedInputStream bis = new BufferedInputStream(
                    new FileInputStream(file));
            BufferedOutputStream bos = new BufferedOutputStream(
                    new FileOutputStream(target));
            byte[] buf = new byte[1024];
            int len = 0;
            while((len=bis.read(buf))!= -1){
                bos.write(buf, 0,len);
            }
            bis.close();
            bos.close();
        }