java复制文件 转

package test.jing.java;

import java.io.*;

public class MovePictures {
    /***
     * 复制单个文件*
     * @param oldPath
     *            String 原文件路径 如：c:/fqf.txt*
     * @param newPath
     *            String 复制后路径 如：f:/fqf.txt*
     *            @return boolean
     */

    public void copyFile(String oldPath, String newPath) {
        try {
            int bytesum = 0;
            int byteread = 0;
            File oldfile = new File(oldPath);
            if (oldfile.exists()) { // 文件存在时
                InputStream inStream = new FileInputStream(oldPath); // 读入原文件
                FileOutputStream fs = new FileOutputStream(newPath);
                byte[] buffer = new byte[1444];
                int length;
                while ((byteread = inStream.read(buffer)) != -1) {
                    bytesum += byteread; // 字节数 文件大小
                    System.out.println(bytesum);
                    fs.write(buffer, 0, byteread);
                }
                inStream.close();
            }
        } catch (Exception e) {
            System.out.println("复制单个文件操作出错");
            e.printStackTrace();

        }

    }

    /**
     * 复制整个文件夹内容
     * 
     * @param oldPath
     *            String 原文件路径 如：c:/fqf
     * @param newPath
     *            String 复制后路径 如：f:/fqf/ff
     * @return boolean
     */
    public void copyFolder(String oldPath, String newPath) {

        try {
            (new File(newPath)).mkdirs(); // 如果文件夹不存在 则建立新文件夹
            File a = new File(oldPath);
            String[] file = a.list();
            File temp = null;
            for (int i = 0; i < file.length; i++) {
                if (oldPath.endsWith(File.separator)) {
                    temp = new File(oldPath + file[i]);
                } else {
                    temp = new File(oldPath + File.separator + file[i]);
                }

                if (temp.isFile()) {
                    FileInputStream input = new FileInputStream(temp);
                    FileOutputStream output = new FileOutputStream(newPath + "/" + (temp.getName()).toString());
                    byte[] b = new byte[1024 * 5];
                    int len;
                    while ((len = input.read(b)) != -1) {
                        output.write(b, 0, len);
                    }
                    output.flush();
                    output.close();
                    input.close();
                }
                if (temp.isDirectory()) {// 如果是子文件夹
                    copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);
                }
            }
        } catch (Exception e) {
            System.out.println("复制整个文件夹内容操作出错");
            e.printStackTrace();

        }

    }

    public static void main(String[] args) {
        MovePictures movePictures = new MovePictures();
        String oldPath = "D:/pictureWorkSpace/oldFolder/122.txt";
        String newPath = "D:/pictureWorkSpace/newFolder/122.txt";
        movePictures.copyFile(oldPath, newPath);
    }
}

参考文章 java从一个目录拷贝文件到另一个目录下