Home  >  Article  >  Java  >  How to delete files in java

How to delete files in java

尚
Original
2019-11-21 14:18:2815036browse

How to delete files in java

java删除文件的方法:

package test816;
 
import java.io.File;
 
/**
 * 
 * 删除文件或目录
 * 
 */
 
public class DeleteFileUtil {
	/**
	 * 删除文件,可以是单个文件或文件夹
	 * 
	 * @param fileName
	 *            待删除的文件名
	 * @return 文件删除成功返回true,否则返回false
	 */
	public static boolean delete(String fileName) {
		File file = new File(fileName);
		if (!file.exists()) {
			System.out.println("删除文件失败:" + fileName + "文件不存在");
			return false;
		} else {
			if (file.isFile()) {
 
				return deleteFile(fileName);
			} else {
				return deleteDirectory(fileName);
			}
		}
	}
 
	/**
	 * 删除单个文件
	 * 
	 * @param fileName
	 *            被删除文件的文件名
	 * @return 单个文件删除成功返回true,否则返回false
	 */
	public static boolean deleteFile(String fileName) {
		File file = new File(fileName);
		if (file.isFile() && file.exists()) {
			file.delete();
			System.out.println("删除单个文件" + fileName + "成功!");
			return true;
		} else {
			System.out.println("删除单个文件" + fileName + "失败!");
			return false;
		}
	}
 
	/**
	 * 删除目录(文件夹)以及目录下的文件
	 * 
	 * @param dir
	 *            被删除目录的文件路径
	 * @return 目录删除成功返回true,否则返回false
	 */
	public static boolean deleteDirectory(String dir) {
		// 如果dir不以文件分隔符结尾,自动添加文件分隔符
		if (!dir.endsWith(File.separator)) {
			dir = dir + File.separator;
		}
		File dirFile = new File(dir);
		// 如果dir对应的文件不存在,或者不是一个目录,则退出
		if (!dirFile.exists() || !dirFile.isDirectory()) {
			System.out.println("删除目录失败" + dir + "目录不存在!");
			return false;
		}
		boolean flag = true;
		// 删除文件夹下的所有文件(包括子目录)
		File[] files = dirFile.listFiles();
		for (int i = 0; i < files.length; i++) {
			// 删除子文件
			if (files[i].isFile()) {
				flag = deleteFile(files[i].getAbsolutePath());
				if (!flag) {
					break;
				}
			}
			// 删除子目录
			else {
				flag = deleteDirectory(files[i].getAbsolutePath());
				if (!flag) {
					break;
				}
			}
		}
 
		if (!flag) {
			System.out.println("删除目录失败");
			return false;
		}
 
		// 删除当前目录
		if (dirFile.delete()) {
			System.out.println("删除目录" + dir + "成功!");
			return true;
		} else {
			System.out.println("删除目录" + dir + "失败!");
			return false;
		}
	}
	// 删除文件夹
	// param folderPath 文件夹完整绝对路径
 
	public static void delFolder(String folderPath) {
		try {
			delAllFile(folderPath); // 删除完里面所有内容
			String filePath = folderPath;
			filePath = filePath.toString();
			java.io.File myFilePath = new java.io.File(filePath);
			myFilePath.delete(); // 删除空文件夹
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
 
	// 删除指定文件夹下所有文件
	// param path 文件夹完整绝对路径
	public static boolean delAllFile(String path) {
		boolean flag = false;
		File file = new File(path);
		if (!file.exists()) {
			return flag;
		}
		if (!file.isDirectory()) {
			return flag;
		}
		String[] tempList = file.list();
		File temp = null;
		for (int i = 0; i < tempList.length; i++) {
			if (path.endsWith(File.separator)) {
				temp = new File(path + tempList[i]);
			} else {
				temp = new File(path + File.separator + tempList[i]);
			}
			if (temp.isFile()) {
				temp.delete();
			}
			if (temp.isDirectory()) {
				delAllFile(path + "/" + tempList[i]);// 先删除文件夹里面的文件
				delFolder(path + "/" + tempList[i]);// 再删除空文件夹
				flag = true;
			}
		}
		return flag;
	}
 
	public static void main(String[] args) {
		// String fileName = "g:/temp/xwz.txt";
		// DeleteFileUtil.deleteFile(fileName);
		String fileDir = "D:\\temp\\pom.xml";
		// DeleteFileUtil.deleteDirectory(fileDir);
		DeleteFileUtil.delete(fileDir);
		DeleteFileUtil t = new DeleteFileUtil();
		delFolder("c:/bb");
		System.out.println("deleted");
 
	}
}

更多java知识请关注java基础教程

The above is the detailed content of How to delete files in java. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn