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Java method examples for deleting files, directories and all files in the directory
Java method examples for deleting files, directories and all files in the directory
Preface
The main function of this article is to delete a certain directory and all subdirectories and files under the directory. The knowledge points involved: File.delete() is used to delete "a certain file or empty file". Table of contents"! So to delete a directory and all the files and subdirectories in it, you need to delete it recursively.
The specific code examples are as follows:
import java.io.File;
public class DeleteDirectory {
/**
* 删除空目录
* @param dir 将要删除的目录路径
*/
private static void doDeleteEmptyDir(String dir) {
boolean success = (new File(dir)).delete();
if (success) {
System.out.println("Successfully deleted empty directory: " + dir);
} else {
System.out.println("Failed to delete empty directory: " + dir);
}
}
/**
* 递归删除目录下的所有文件及子目录下所有文件
* @param dir 将要删除的文件目录
* @return boolean Returns "true" if all deletions were successful.
* If a deletion fails, the method stops attempting to
* delete and returns "false".
*/
private static boolean deleteDir(File dir) {
if (dir.isDirectory()) {
String[] children = dir.list();
//递归删除目录中的子目录下
for (int i=0; i<children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
// 目录此时为空，可以删除
return dir.delete();
}
/**
*测试
*/
public static void main(String[] args) {
doDeleteEmptyDir("new_dir1");
String newDir2 = "new_dir2";
boolean success = deleteDir(new File(newDir2));
if (success) {
System.out.println("Successfully deleted populated directory: " + newDir2);
} else {
System.out.println("Failed to delete populated directory: " + newDir2);
}
}
}Summary
The above is the entire content of this article. I hope that the content of this article can bring certain benefits to everyone's study or work. Help, if you have any questions, you can leave a message to communicate.
For more Java methods and examples of deleting files, directories and all files in the directory, please pay attention to the PHP Chinese website!
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