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Determine whether a file or folder exists in java

王林
Release: 2019-11-19 10:49:51
Original
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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();    
    }    
}
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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");  
}
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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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