Java-如何从Java文件夹中删除文件？

Question

我正在尝试使用for循环删除文件。

for(int i = 0; i < 3; i++) {

   String pathName = "test" + i + ".csv";
   boolean success = (new File(pathName)).delete();

}

但是此代码仅删除第一个文件，而不删除其他文件。

Answer 1

这对我有用。也许文件所在的路径不正确。

for(int i = 1; i <= 3; i++) {
    boolean success = (new File("C:\\Users\\Suppada-Aide\\Desktop\\test"+i+".txt")).delete();
    System.out.println(success);
}

Answer 2

只需使用此代码：

public class Example {
    public static void main(String args[]) {
        // set the folder path 
        File folder = new File("C:\\Users\\Desktop\\New Folder");
        // call this method
        deleteFiles(folder);
    }

    // this method recursively goes into the folder and delete all the files.
    private static void deleteFiles(File folder) {
        for (File file : folder.listFiles()) {
            // check whether the file is a directory or not.
            if (file.isDirectory()) {
                deleteFiles(file);
            }
            // check whether file starts with "test" or not.
            // if matched, then file is deleted or not.
            if (file.getName().startsWith("test")) {
                if (file.delete()) {
                  System.out.println("File deleted");
                }
            }

        }

    }

}

输出：

File deleted
File deleted

只需根据您的需要修改代码。

希望对您有帮助。

：）