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Java determines whether a file exists

Release: 2019-11-19 14:46:18
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Java determines whether a file exists

java中可以使用file.exists()方法来检测文件是否存在,public boolean exists()测试此抽象路径名表示的文件或目录是否存在。

java判断文件是否存在的方法:

public static void main(String[] args) {
        File file = new File("G:\\Jeff.txt");
        File dir = new File("G:\\Jeff");
        // 判断文件是否存在
        if (file.exists()) {
            System.out.println("文件已存在");
        } else {
            System.out.println("文件不存在");
            try {
                file.createNewFile();
                System.out.println("创建文件");
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        
    }
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Java文件类以抽象的方式代表文件名和目录路径名。file类主要用于文件和目录的创建、文件的查找和文件的删除等。

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