java文件复制代码片断(java实现文件拷贝)

package com.itheima;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;/** * 5、 编写程序拷贝一个文件, 尽量使用效率高的方式. *  * @author 2811671413@qq.com *  *     1、源文件不能读取到的情况。 2、目的文件创建失败的情况 3、文件锁问题 4、字符乱码问题 */public class Test5 {	public static void main(String[] args) throws IOException {		String src_file = "D:/java/java.doc";		String des_file = "D:/java/java_copy.doc";				copyFile(src_file, des_file);				System.out.println("OK!");	}	public static void copyFile(String src, String des) throws IOException {		BufferedInputStream inBuff = null;		BufferedOutputStream outBuff = null;				try {			// 新建文件输入流并对它进行缓冲			inBuff = new BufferedInputStream(new FileInputStream(src));			// 新建文件输出流并对它进行缓冲			outBuff = new BufferedOutputStream(new FileOutputStream(des));			// 缓冲数组			byte[] b = new byte[1024 * 5];			int len;			while ((len = inBuff.read(b)) != -1) {				outBuff.write(b, 0, len);			}			// 刷新此缓冲的输出流			outBuff.flush();		} finally {			// 关闭流			if (inBuff != null)				inBuff.close();			if (outBuff != null)				outBuff.close();		}	}}

try {      File inputFile = new File(args[0]);      if (!inputFile.exists()) {        System.out.println("源文件不存在，程序终止");        System.exit(1);      }      File outputFile = new File(args[1]);      InputStream in = new FileInputStream(inputFile);      OutputStream out = new FileOutputStream(outputFile);      byte date[] = new byte[1024];      int temp = 0;      while ((temp = in.read(date)) != -1) {        out.write(date);      }      in.close();      out.close();    } catch (FileNotFoundException e) {      // TODO Auto-generated catch block      e.printStackTrace();    } catch (IOException e) {      // TODO Auto-generated catch block      e.printStackTrace();    }