Wizzer's Blog

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);
    }
}