纯Java文件操作工具,支持文件、文件夹的复制、删除、移动
 
Java文件操作比较弱,没有文件夹的操作API,在网上搜了下,没有现成的,自己写个,算是对Java API的补充,欢迎使用!
 
不依赖第三方的包。
 
实现的原理主要是用到了递归处理。
 
package com.asiainfo.boss.ngcs.ext.reissuemrpt.common;

import java.io.*;

/**
* 纯Java文件操作工具,支持文件、文件夹的复制、删除、移动操作。
*
* @author leizhimin 2010-6-2 16:12:14
*/

public class FileToolkit {
        public FileToolkit() {
        }

        public static void main(String args[]) throws IOException {
//                delete(new File("C:/aaa"));
//                copy(new File("D:\\work\\mrpt"), new File("C:\\aaa")); 
                move(new File("C:\\bbb"), new File("C:\\ddd"));

        }

        /**
         * 删除文件(夹)
         *
         * @param file 文件(夹)
         */

        public static void delete(File file) {
                if (!file.exists()) return;
                if (file.isFile()) {
                        file.delete();
                } else {
                        for (File f : file.listFiles()) {
                                delete(f);
                        }
                        file.delete();
                }
        }

        /**
         * 复制文件(夹)到一个目标文件夹
         *
         * @param resFile             源文件(夹)
         * @param objFolderFile 目标文件夹
         * @throws IOException 异常时抛出
         */

        public static void copy(File resFile, File objFolderFile) throws IOException {
                if (!resFile.exists()) return;
                if (!objFolderFile.exists()) objFolderFile.mkdirs();
                if (resFile.isFile()) {
                        File objFile = new File(objFolderFile.getPath() + File.separator + resFile.getName());
                        //复制文件到目标地
                        InputStream ins = new FileInputStream(resFile);
                        FileOutputStream outs = new FileOutputStream(objFile);
                        byte[] buffer = new byte[1024 * 512];
                        int length;
                        while ((length = ins.read(buffer)) != -1) {
                                outs.write(buffer, 0, length);
                        }
                        ins.close();
                        outs.flush();
                        outs.close();
                } else {
                        String objFolder = objFolderFile.getPath() + File.separator + resFile.getName();
                        File _objFolderFile = new File(objFolder);
                        _objFolderFile.mkdirs();
                        for (File sf : resFile.listFiles()) {
                                copy(sf, new File(objFolder));
                        }
                }
        }

        /**
         * 将文件(夹)移动到令一个文件夹
         *
         * @param resFile             源文件(夹)
         * @param objFolderFile 目标文件夹
         * @throws IOException 异常时抛出
         */

        public static void move(File resFile, File objFolderFile) throws IOException {
                copy(resFile, objFolderFile);
                delete(resFile);
        }
}