package com.itheima;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;/** * 5、 編寫程序拷貝一個文件, 盡量使用效率高的方式. *  * @author 2811671413@qq.com *  *     1、源文件不能讀取到的情況。 2、目的文件創建失敗的情況 3、文件鎖問題 4、字符亂碼問題 */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 {			// 新建文件輸入流并對它進行緩沖			inBuff = new BufferedInputStream(new FileInputStream(src));			// 新建文件輸出流并對它進行緩沖			outBuff = new BufferedOutputStream(new FileOutputStream(des));			// 緩沖數組			byte[] b = new byte[1024 * 5];			int len;			while ((len = inBuff.read(b)) != -1) {				outBuff.write(b, 0, len);			}			// 刷新此緩沖的輸出流			outBuff.flush();		} finally {			// 關閉流			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，程序終止");        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();    }