How to determine whether a file exists in java and create a new file if it does not exist

一、判断文件是否存在，不存在则创建

File file = new File("d:\\test.txt");
if (!file.exists()) {
    try {
        file.createNewFile();
    } catch (IOException e) {
        e.printStackTrace();
    }
    System.out.println("文件已创建");
} else {
    System.out.println("文件已存在");
}

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二、判断文件夹是否存在，不存在则创建

File folder = new File("d:\\test1\\test2");
if (!folder.exists() && !folder.isDirectory()) {
    folder.mkdirs();
    System.out.println("创建文件夹");
} else {
    System.out.println("文件夹已存在");
}

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