private static void copySimpleFile(File inputFile, File outputFile,
									   boolean isOverWrite) throws IOException {
		// 目标文件已经存在
		if (outputFile.exists()) {
			if (isOverWrite) {
				if (!outputFile.delete()) {
					throw new RuntimeException(outputFile.getPath() + "无法覆盖！");
				}
			} else {
				// 不允许覆盖
				return;
			}
		}
		InputStream in = new FileInputStream(inputFile);
		OutputStream out = new FileOutputStream(outputFile);
		byte[] buffer = new byte[1024];
		int read = 0;
		while ((read = in.read(buffer)) != -1) {
			out.write(buffer, 0, read);
		}
		in.close();
		out.close();
	}