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;
- }
- }
-
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