前言
本文主要實現的功能是刪除某個目錄及目錄下的所有子目錄和文件，涉及到的知識點： File.delete()用於刪除“某個文件或者空目錄”！所以要刪除某個目錄及其中的所有文件和子目錄，要進行遞歸刪除。
具體代碼示例如下：
import java.io.File;public class DeleteDirectory { /** * 刪除空目錄* @param dir 將要刪除的目錄路徑*/ 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); } } /** * 遞歸刪除目錄下的所有文件及子目錄下所有文件* @param dir 將要刪除的文件目錄* @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(); //遞歸刪除目錄中的子目錄下for (int i=0; i<children.length; i++) { boolean success = deleteDir(new File(dir, children[i])); if (!success) { return false; } } } // 目錄此時為空，可以刪除return dir.delete(); } /** *測試*/ 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); } }}總結
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