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Determine whether a file or folder exists in java

王林
王林 Original
2019-11-19 10:49:51 4617browse

Determine whether a file or folder exists in java

1、判断文件是否存在,不存在创建文件

File file=new File("C:\\Users\\QPING\\Desktop\\JavaScript\\2.htm"); if(!file.exists()) { try { file.createNewFile(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }

2、判断文件夹是否存在,不存在创建文件夹

File file =new File("C:\\Users\\QPING\\Desktop\\JavaScript"); //如果文件夹不存在则创建 if (!file .exists() && !file .isDirectory()) { System.out.println("//不存在"); file .mkdir(); } else { System.out.println("//目录存在"); }

备注:文件路径是filePath = D:\word\111\test.txt 带文件的,使用getParentFile 获取父文件

if(!file.getParentFile().isDirectory()){ file.getParentFile().mkdirs(); }

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