文件夹复制

 public void copyFiles(String oldPath, String newPath) {

        File file = new File(oldPath);

        if (!file.exists()) {
            System.out.println(oldPath + " not have");
            return;
        }
        File fileb = new File(newPath);

        if (file.isFile()) {
            FileInputStream fis = null;
            FileOutputStream fos = null;
            try {
                fis = new FileInputStream(file);
                fos = new FileOutputStream(fileb);

                byte[] bb = new byte[(int) file.length()];
                fis.read(bb);
                fos.write(bb);

            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    fis.close();
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        } else if (file.isDirectory()) {
            if (!fileb.exists()) {
                fileb.mkdir();
            }
            String[] fileList;
            fileList = file.list();
            for (int i = 0; i < fileList.length; i++) {
                copyFiles(oldPath + "/" + fileList[i], newPath + "/" + fileList[i]);
            }
        }

    }

评论

2 楼 catastiger 2010-11-16  

/**
     * 大文件递归复制
     * @param fromPath 源文件File
     * @param toPath 目标目录File
     *
     */
    public void copyFile(String fromPath, String toPath) {
        File fromFile = new File(fromPath);
        File toFile = new File(toPath);
        try {
            if (fromFile.isFile()) {
                FileChannel fcin = new FileInputStream(fromFile).getChannel();
                FileChannel fcout = new FileOutputStream(toFile).getChannel();
                ByteBuffer bb = ByteBuffer.allocate(1024);
                while (fcin.read(bb) != -1) {
                    bb.flip();
                    fcout.write(bb);
                    bb.clear();
                }
                fcin.close();
                fcout.close();
            } else if (fromFile.isDirectory()) {
                if (!toFile.exists()) {
                    toFile.mkdir();
                }
                String[] fileList;
                fileList = fromFile.list();
                for (int i = 0; i < fileList.length; i++) {
                    copyFile(fromPath + File.separator + fileList[i], toPath + File.separator + fileList[i]);
                }
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            logger.error(e.getMessage());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            logger.error(e.getMessage());
        }
    }

1 楼 catastiger 2010-11-12  

递归删除
public void deleteFile(String path) {
        File file = new File(path);
        File[] temp = file.listFiles();
        for (int i = 0; i < temp.length; i++) {
            if (temp[i].isDirectory()) {
                if (temp[i].listFiles().length != 0){
                    deleteFile(temp[i].getAbsolutePath());
                }
                this.deleteDir(temp[i]);
            } else {
                temp[i].delete();
            }
        }
    }

    private void deleteDir(File file) {
        if (file.listFiles().length == 0){
            file.getAbsoluteFile().delete();
        }
    }