文件树的建立和文件拷贝

目标：
实现将一个folder下的file和folder分别复制和创建在指定的folder之下；递归创建文件树，使用IO流实现文件拷贝

 

package com.softstone.t; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; /** * 实现将一个folder下的file和folder分别复制和创建在指定的folder之下； * 递归创建文件树，使用IO流实现文件拷贝 * @author lilei * */ public class FileCopy { private File fileSrc; private File fileDest; private FileInputStream fis; private FileOutputStream fos; private byte[] buf; //缓冲区大小 public static String SEP = File.separator; public FileCopy() throws Exception { buf = new byte[1024 * 8]; } public void copy(String src, String dest) throws IOException { fileSrc = new File(src); fileDest = new File(dest); File[] files = fileSrc.listFiles(); if(files == null) return; //null return for(File f : files) { if(f.isDirectory()) { fileDest = new File(dest + SEP + f.getName()); fileDest.mkdir(); //递归当前文件夹下的内容时，记录当前路径用于完成下一层递归操作后返回到它的上一层进行操作路径 String oldSrc = src; String oldDest = dest; src = src + f.getName() + SEP; dest = dest + f.getName() + SEP; copy(src, dest); src = oldSrc; dest = oldDest; } else { System.out.println(f.getName()); System.out.println("src:" + f.getPath()); System.out.println("dest:" + dest); dest = dest + f.getName(); fileSrc = new File(f.getPath()); fis = new FileInputStream(fileSrc); fileDest = new File(dest); fos = new FileOutputStream(fileDest); int i = 0; while((i=fis.read(buf)) != -1) { fos.write(buf, 0, i); } } } } /** * 操作完成之后进行资源的释放 */ public void close() { try { fis.close(); fos.close(); } catch (IOException e) { e.printStackTrace(); } finally { try { if(fis != null) { fis.close(); fis = null; } if(fos != null) { fos.close(); fis = null; } } catch (IOException e) { e.printStackTrace(); } } } }