文件copy工具类的简单实现
这个工具类是我模仿Spring的工具类实现的，从模仿spring的编程风格开始塑造自己的编程风格。
package com.amuse.utils;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;/** * 类FileCopyUtil.java的实现描述：FileCopyUtil.java * @author yongchun.chengyc 2012-3-7 下午6:37:05 */public class FileCopyUtil { /** 字节缓冲数组的大小 */ private static final int BUFFER_SIZE = 4096; /** * 将 File in 的内容复制到 File out 中 * * @param in 源文件 * @param out 目标文件 * @return the number of bytes copied * @throws IOException 如果 I/O errors */ public static int copy(File in, File out) throws IOException { if ((in == null) || (out == null)) { throw new IOException("No input File specified or No output File specified"); } return copy(new BufferedInputStream(new FileInputStream(in)), new BufferedOutputStream(new FileOutputStream(out))); } /** * @param in 源stream * @param out 目标stream * @return the number of bytes copied * @throws IOException 如果 I/O errors */ private static int copy(BufferedInputStream in, BufferedOutputStream out) throws IOException { if ((in == null) || (out == null)) { throw new IOException("No InputStream specified or No OutputStream specified"); } int byteCount = 0; byte[] buffer = new byte[BUFFER_SIZE]; int bytesRead = -1; if ((bytesRead = in.read(buffer)) != -1) { out.write(buffer, 0, bytesRead); byteCount += bytesRead; } out.flush(); return byteCount; } public static void main(String[] args) throws IOException { File in = new File("/home/drew/桌面/test"); File out = new File("/home/drew/桌面/test1"); FileCopyUtil.copy(in, out); }}?