自己写的文件操作工具类

    该工具类包括新建文件、新建文件夹、根据文件名删除文件或文件夹、删除文件夹下所有对象、在文件末尾追加写入等等操作

 

import java.io.*;/** * 文件操作工具类 * @author lifeng 2011-11-18 下午01:23:46 */public class FileOperator {public FileOperator() {}/** * 如果文件不存在,则在指定目录下创建 * @author lifeng * @param parent 父路径文件对象 * @param fileName 文件名 * @return 返回需要的文件对象 * @throws IOException */public static File createFileIfNotExist(File parent, String fileName)throws IOException {File result = null;try {if (!parent.exists())parent.mkdirs();result = new File((new StringBuilder(String.valueOf(parent.getAbsolutePath()))).append(File.separator).append(fileName).toString());if (!result.exists())result.createNewFile();} catch (IOException e) {throw new IOException((new StringBuilder("\u65B0\u5EFA\u6587\u4EF6[")).append(result.getAbsolutePath()).append("]\u51FA\u9519!").toString());}return result;}/** * 如果文件夹不存在的话,在指定目录下创建文件夹 * @author lifeng * @param parent 父路径文件对象 * @param folderName 文件夹名 * @return 返回所需文件对象 */public static File createFolderIfNotExist(File parent, String folderName) {File result = null;if (!parent.exists())parent.mkdirs();result = new File((new StringBuilder(String.valueOf(parent.getAbsolutePath()))).append(File.separator).append(folderName).toString());if (!result.exists())result.mkdir();return result;}/** * 在制定文件的末端写入字符数据 * @author lifeng * @param filePath 文件全路径 * @param fileData 字符串数据 * @throws IOException */public static void writeIntoFile(String filePath, String fileData)throws IOException {try {RandomAccessFile raf = new RandomAccessFile(filePath, "rw");long fileLentgh = raf.length();raf.seek(fileLentgh);raf.writeBytes(fileData);raf.close();} catch (FileNotFoundException e) {throw new FileNotFoundException((new StringBuilder("\u8FFD\u52A0\u5199\u5165-\u627E\u4E0D\u5230\u6587\u4EF6[")).append(filePath).append("]!").toString());} catch (IOException e) {throw new IOException((new StringBuilder("\u5BF9\u6587\u4EF6[")).append(filePath).append("]\u8FFD\u52A0\u5199\u5165\u51FA\u9519!").toString());}}/** * 将文件复制到指定目录下 * @author lifeng * @param srcFile 源文件 * @param destPath 目标路径 * @throws IOException */public static void moveFile(File srcFile, String destPath)throws IOException {byte b[] = new byte[1024];int n = 0;try {File destFolder = new File(destPath);if (!destFolder.exists())destFolder.mkdirs();File fo = new File(destPath, srcFile.getName());fo.createNewFile();FileInputStream fis = new FileInputStream(srcFile);FileOutputStream fos = new FileOutputStream(fo);while ((n = fis.read(b)) != -1)fos.write(b, 0, n);fis.close();fos.close();} catch (FileNotFoundException fnfe) {throw new FileNotFoundException("\u590D\u5236\u79FB\u52A8-\u6587\u4EF6\u672A\u627E\u5230!");} catch (IOException e) {throw new IOException("\u590D\u5236\u79FB\u52A8-\u6587\u4EF6\u64CD\u4F5C\u5931\u8D25!");}}/** * 从jar包中获取文件对象 * @author lifeng * @param filePath 所处路径,若为res/a.jar,则表示项目路径为:src/res/a.jar * @return */public static File getFile(String filePath) {String plguinUrl = Thread.currentThread().getContextClassLoader().getResource(filePath).getPath();File pluginFile = new File(plguinUrl);return pluginFile;}/** * 复制移动完整的文件目录,包括文件夹下的所有内容 * @author lifeng * @param oldPath * @param newPath */public static void moveWholeFile(File srcFile, String newPath) {try {(new File(newPath)).mkdirs(); // 如果文件夹不存在 则建立新文件夹String oldPath = srcFile.getAbsolutePath();String[] file = srcFile.list();File temp = srcFile;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moveWholeFile(new File(srcFile.getAbsoluteFile() + "/"+ 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();}}/** * 删除所有path目录下的名为fileName的文件(flag:1表示删除文件,2表示删除文件夹) * @parm path 文件路径 * @parm fileName 所要删除的文件名 * @parm flag 删除标志,1：删除文件，2：删除文件夹 * @author lifeng 2011-11-18 */public static int deleteFiles(String path, String fileName, int operateNum ,int flag) {File pathFile = new File(path);File[] files = pathFile.listFiles();int tempNum = operateNum;for (int i = 0; i < files.length; i++) {File temp = files[i];if (temp.isDirectory() && flag==2) {if (temp.getName().equals(fileName)) {delFolder(temp.getAbsolutePath(),operateNum);tempNum++;} else {deleteFiles(temp.getAbsolutePath(),fileName,tempNum,flag);}} else if (temp.isFile() && flag==1){if (temp.getName().equals(fileName)) {temp.delete();tempNum++;}}}return tempNum;}/** * 删除文件夹及其下所有文件 * @author lifeng * @param folderPath */public static void delFolder(String folderPath,int operateNum) {try {delAllFile(folderPath,operateNum); // 删除完里面所有内容String filePath = folderPath;filePath = filePath.toString();File myFilePath = new File(filePath);myFilePath.delete(); // 删除空文件夹operateNum++;} catch (Exception e) {e.printStackTrace();}}/** * 删除指定文件夹下所有文件 * @author lifeng * @param path 文件夹完整绝对路径 * @return */public static boolean delAllFile(String path,int operateNum) {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();operateNum++;}if (temp.isDirectory()) {delAllFile(path + "/" + tempList[i],operateNum);// 先删除文件夹里面的文件delFolder(path + "/" + tempList[i],operateNum);// 再删除空文件夹flag = true;}}return flag;}}