public void newFile(File file){
	try {
		if (file.createNewFile()) {
			System.out.println("文件创建成功！");
		} else {
			String cName = changeName(file);
			File files = new File("." + File.separator + cName);
			newFile(files);
		}
	} catch (IOException e) {
		e.printStackTrace();
	}
}

public String changeName(File file) {
	String name = file.getName();
	int index = name.lastIndexOf('.');
	int index2 = name.lastIndexOf("_副本");
	if (index2 < 0) {
		return name.substring(0, index) + "_副本1" + name.substring(index);
	} else {
		String num = name.substring(index2+3, index);
		int i = Integer.valueOf(num)+1;
		return name.substring(0, index2) + "_副本" + i + name.substring(index);
	}
}