public static void main(String[] args) throws Exception {

		// TODO 自动生成的方法存根

		if(args.length != 2)

		{

			System.out.println("您输入的参数有误");

			System.exit(1);

		}

		if(args[0].equals(args[1]))

		{

			System.out.println("源文件和目标文件不能一致");

			System.exit(2);

		}

		File file = new File(args[0]);

		if(file.exists())

		{

			InputStream ipt = new FileInputStream(file);

			File file2 = new File(args[1]);

			OutputStream out = new FileOutputStream(file2);

			int temp = -1;

			while( (temp = ipt.read())!=-1 )

			{

				out.write(temp);

			}

			System.out.println("文件复制成功");

			ipt.close();

			out.close();

		}else{

			System.out.println("源文件不存在");

			System.exit(3);

		}

	}