(Java)文件及其文件夹的复制，删除，拷贝等操作类
package util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
public class FileUtil {
??? private final static String FILE_SUFFIX = ".java.drl";
??? private final static String FILE_TEMP = "C:/temp/";
??? /**
??? ?* 将已存在的drl文件删除
??? ?*
??? ?* @param ObjectPath
??? ?*/
??? public static void deleteExistedDRLFile(String ObjectPath) {
??? ??? File filePath = new File(ObjectPath);
??? ??? if (!filePath.exists()) {
??? ??? ??? System.out.println("目录不存在!");
??? ??? } else {
??? ??? ??? if (filePath.isDirectory()) {
??? ??? ??? ??? File[] list = filePath.listFiles(new FilenameFilter() {
??? ??? ??? ??? ??? public boolean accept(File dir, String name) {
??? ??? ??? ??? ??? ??? return name.endsWith(FILE_SUFFIX);
??? ??? ??? ??? ??? }
??? ??? ??? ??? });
??? ??? ??? ??? for (int i = 0; i < list.length; i++) {
??? ??? ??? ??? ??? list[i].delete();
??? ??? ??? ??? }
??? ??? ??? }
??? ??? }
??? }
??? /**
??? ?* 创建文件夹,如果有则不创建
??? ?*
??? ?* @param ObjectPath
??? ?*/
??? public static boolean creareDirectory(String ObjectPath) {
??? ??? boolean flag = true;
??? ??? File filePath = new File(ObjectPath);
??? ??? if (!filePath.exists()) {
??? ??? ??? filePath.mkdir();
??? ??? ??? flag = false;
??? ??? }
??? ??? return flag;
??? }
??? /**
??? ?* 查看某文件夹下面是否有文件,有文件则创建一个temp文件夹,将文件拷贝到temp目录下(备份文件) 没有文件怎什么都不做
??? ?* 备份后，把原文件夹里文件删除
??? ?*
??? ?* @param ObjectPath
??? ?*/
??? public static void backupFile(String ObjectPath, String dirName) {
??? ??? String backupPath;
??? ??? if (!FILE_TEMP.endsWith(File.separator)) {
??? ??? ??? backupPath = FILE_TEMP + File.separator + dirName;
??? ??? } else {
??? ??? ??? backupPath = FILE_TEMP + dirName;
??? ??? }
??? ??? File backupFilePath = new File(backupPath);
??? ??? if (!backupFilePath.exists()) {
??? ??? ??? backupFilePath.mkdirs();
??? ??? }
??? ??? File filePath = new File(ObjectPath);
??? ??? if (!filePath.exists()) {
??? ??? ??? System.out.println("目录不存在!");
??? ??? } else {
??? ??? ??? if (filePath.isDirectory()) {
??? ??? ??? ??? File[] list = filePath.listFiles();
??? ??? ??? ??? if (list != null && list.length != 0) {
??? ??? ??? ??? ??? copyFolder(ObjectPath, backupPath);// 文件备份
??? ??? ??? ??? ??? for (int i = 0; i < list.length; i++) {
??? ??? ??? ??? ??? ??? list[i].delete();
??? ??? ??? ??? ??? }
??? ??? ??? ??? }
??? ??? ??? }
??? ??? }
??? }
??? /**
??? ?* 复原文件，把文件从备份文件夹拷贝到原来文件夹
??? ?*
??? ?* @param ObjectPath
??? ?* @param dirName
??? ?*/
??? public static void recoverFile(String ObjectPath, String dirName) {
??? ??? String backupPath;
??? ??? if (ObjectPath.endsWith(File.separator)) {
??? ??? ??? ObjectPath = new StringBuffer(ObjectPath).append(dirName)
??? ??? ??? ??? ??? .toString();
??? ??? } else {
??? ??? ??? ObjectPath = new StringBuffer(ObjectPath)
??? ??? ??? ??? ??? .append(File.separatorChar).append(dirName).toString();
??? ??? }
??? ??? if (!FILE_TEMP.endsWith(File.separator)) {
??? ??? ??? backupPath = FILE_TEMP + File.separator + dirName;
??? ??? } else {
??? ??? ??? backupPath = FILE_TEMP + dirName;
??? ??? }
??? ??? File backupFilePath = new File(backupPath);
??? ??? if (!backupFilePath.exists()) {
??? ??? ??? backupFilePath.mkdirs();
??? ??? }
??? ??? File filePath = new File(ObjectPath);
??? ??? if (!filePath.exists()) {
??? ??? ??? System.out.println("目录不存在!");
??? ??? } else {
??? ??? ??? if (filePath.isDirectory()) {
??? ??? ??? ??? File[] list = filePath.listFiles();
??? ??? ??? ??? if (list != null && list.length != 0) {
??? ??? ??? ??? ??? copyFolder(backupPath, ObjectPath);// 文件复原
??? ??? ??? ??? }
??? ??? ??? }
??? ??? }
??? }
??? /**
??? ?* 复制整个文件夹内容
??? ?*
??? ?* @param oldPath
??? ?*??????????? String 原文件路径 如：c:/fqf
??? ?* @param newPath
??? ?*??????????? String 复制后路径 如：f:/fqf/ff
??? ?* @return boolean
??? ?*/
??? public static void copyFolder(String oldPath, String newPath) {
??? ??? try {
??? ??? ??? (new File(newPath)).mkdir(); // 如果文件夹不存在 则建立新文件夹
??? ??? ??? File a = new File(oldPath);
??? ??? ??? String[] file = a.list();
??? ??? ??? File temp = null;
??? ??? ??? for (int i = 0; i < file.length; i++) {
??? ??? ??? ??? if (oldPath.endsWith(File.separator)) {
??? ??? ??? ??? ??? temp = new File(oldPath + file[i]);
??? ??? ??? ??? } else {
??? ??? ??? ??? ??? temp = new File(oldPath + File.separator + file[i]);
??? ??? ??? ??? }
??? ??? ??? ??? if (temp.isFile()) {
??? ??? ??? ??? ??? FileInputStream input = new FileInputStream(temp);
??? ??? ??? ??? ??? FileOutputStream output = new FileOutputStream(newPath
??? ??? ??? ??? ??? ??? ??? + "/" + (temp.getName()).toString());
??? ??? ??? ??? ??? byte[] b = new byte[1024 * 5];
??? ??? ??? ??? ??? int len;
??? ??? ??? ??? ??? while ((len = input.read(b)) != -1) {
??? ??? ??? ??? ??? ??? output.write(b, 0, len);
??? ??? ??? ??? ??? }
??? ??? ??? ??? ??? output.flush();
??? ??? ??? ??? ??? output.close();
??? ??? ??? ??? ??? input.close();
??? ??? ??? ??? }
??? ??? ??? ??? if (temp.isDirectory()) {// 如果是子文件夹
??? ??? ??? ??? ??? copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);
??? ??? ??? ??? }
??? ??? ??? }
??? ??? } catch (Exception e) {
??? ??? ??? System.out.println("复制整个文件夹内容操作出错");
??? ??? ??? e.printStackTrace();
??? ??? }
??? }
??? /**
??? ?* 删除备份文件和存放备份文件的文件夹
??? ?*
??? ?* @param ObjectPath
??? ?*/
??? public static void deleteFileAndDirectory(String dirName) {
??? ??? String ObjectPath;
??? ??? if (!FILE_TEMP.endsWith(File.separator)) {
??? ??? ??? ObjectPath = FILE_TEMP + File.separator + dirName;
??? ??? } else {
??? ??? ??? ObjectPath = FILE_TEMP + dirName;
??? ??? }
??? ??? File filePath = new File(ObjectPath);
??? ??? if (!filePath.exists()) {
??? ??? ??? filePath.mkdirs();
??? ??? ??? System.out.println("目录不存在!");
??? ??? } else {
??? ??? ??? if (filePath.isDirectory()) {
??? ??? ??? ??? File[] list = filePath.listFiles();
??? ??? ??? ??? for (int i = 0; i < list.length; i++) {
??? ??? ??? ??? ??? list[i].delete();
??? ??? ??? ??? }
??? ??? ??? }
??? ??? ??? filePath.delete();
??? ??? }
??? }
??? /**
??? ?* 判断某文件夹下是否存在文件，存在返回true
??? ?*
??? ?* @param ObjectPath
??? ?* @return
??? ?*/
??? public static boolean existFileInDirectory(String ObjectPath) {
??? ??? boolean flag = false;
??? ??? File filePath = new File(ObjectPath);
??? ??? if (filePath.exists()) {
??? ??? ??? if (filePath.isDirectory()) {
??? ??? ??? ??? File[] list = filePath.listFiles();
??? ??? ??? ??? if (list != null && list.length != 0) {
??? ??? ??? ??? ??? flag = true;
??? ??? ??? ??? }
??? ??? ??? }
??? ??? }
??? ??? return flag;
??? }
??? /**
??? ?* 删除某个文件夹
??? ?* @param ObjectPath
??? ?*/
??? public static void deleteDirectory(String ObjectPath) {
??? ??? File filePath = new File(ObjectPath);
??? ??? if (filePath.exists()) {
??? ??? ??? filePath.delete();
??? ??? }
??? }
??? /**
??? ?* 将已存在的文件删除
??? ?*
??? ?* @param ObjectPath
??? ?*/
??? public static boolean deleteExistedFile(String ObjectPath,final String fileName) {
??? ??? boolean flag =false;
??? ??? File filePath = new File(ObjectPath);
??? ??? if (filePath.exists()) {??? ??? ???
??? ??? ??? if (filePath.isDirectory()) {
??? ??? ??? ??? File[] list = filePath.listFiles(new FilenameFilter() {
??? ??? ??? ??? ??? public boolean accept(File dir, String name) {
??? ??? ??? ??? ??? ??? return name.equals(fileName);
??? ??? ??? ??? ??? }
??? ??? ??? ??? });
??? ??? ??? ??? for (int i = 0; i < list.length; i++) {
??? ??? ??? ??? ??? list[i].delete();
??? ??? ??? ??? }
??? ??? ??? ??? flag=true;
??? ??? ??? }
??? ??? }
??? ???
??? ??? return flag;
??? }
}
