java文件操作源码

// 创建文件夹private File createDir(String path) {File dirFile = null;try {dirFile = new File(path);if (!(dirFile.exists()) && !(dirFile.isDirectory())) {dirFile.mkdirs();}} catch (Exception e) {e.printStackTrace();}return dirFile;}/** * 压缩。 *  * @param src *            源文件或者目录 * @param dest *            压缩文件路径 * @throws IOException */public void zip(String src, String dest) throws IOException {ZipOutputStream out = null;try {File outFile = new File(dest);out = new ZipOutputStream(outFile);File fileOrDirectory = new File(src);if (fileOrDirectory.isFile()) {zipFileOrDirectory(out, fileOrDirectory, "");} else {File[] entries = fileOrDirectory.listFiles();for (int i = 0; i < entries.length; i++) {// 递归压缩，更新curPathszipFileOrDirectory(out, entries[i], "");}}} catch (IOException ex) {ex.printStackTrace();} finally {if (out != null) {try {out.close();} catch (IOException ex) {}}}}/** * 递归压缩文件或目录 *  * @param out *            压缩输出流对象 * @param fileOrDirectory *            要压缩的文件或目录对象 * @param curPath *            当前压缩条目的路径，用于指定条目名称的前缀 * @throws IOException */private void zipFileOrDirectory(ZipOutputStream out, File fileOrDirectory,String curPath) throws IOException {FileInputStream in = null;try {if (!fileOrDirectory.isDirectory()) {// 压缩文件byte[] buffer = new byte[4096];int bytes_read;in = new FileInputStream(fileOrDirectory);ZipEntry entry = new ZipEntry(curPath+ fileOrDirectory.getName());out.putNextEntry(entry);while ((bytes_read = in.read(buffer)) != -1) {out.write(buffer, 0, bytes_read);}out.closeEntry();} else {// 压缩目录File[] entries = fileOrDirectory.listFiles();for (int i = 0; i < entries.length; i++) {// 递归压缩，更新curPathszipFileOrDirectory(out, entries[i], curPath+ fileOrDirectory.getName() + "/");}}} catch (IOException ex) {ex.printStackTrace();throw ex;} finally {if (in != null) {try {in.close();} catch (IOException ex) {}}}}/** * 复制单个文件 *  * @param oldPath *            String 原文件路径 如：c:/fqf.txt * @param newPath *            String 复制后路径 如：f:/fqf.txt * @return boolean */public void copyFile(String oldPath, String newPath){int bytesum = 0;int byteread = 0;File oldfile = new File(oldPath);if (oldfile.exists()) { // 文件存在时try {InputStream inStream = new FileInputStream(oldPath); // 读入原文件FileOutputStream fs = new FileOutputStream(newPath);byte[] buffer = new byte[1444];int length;while ((byteread = inStream.read(buffer)) != -1) {bytesum += byteread; // 字节数 文件大小// System.out.println(bytesum);fs.write(buffer, 0, byteread);}inStream.close();fs.close();} catch (Exception e) {e.printStackTrace();}} else {try {abort("没有这样的源文件: " + oldfile.getName());} catch (IOException e) {e.printStackTrace();}return;}}/** * 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 void copyFolder(String oldPath, String newPath) {try {(new File(newPath)).mkdirs(); // 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();}}// 删除文件及文件夹private boolean delDir(File folder) {boolean result = false;try {String childs[] = folder.list();if (childs == null || childs.length <= 0) {if (folder.delete()) {result = true;}} else {for (int i = 0; i < childs.length; i++) {String childName = childs[i];String childPath = folder.getPath() + File.separator+ childName;File filePath = new File(childPath);if (filePath.exists() && filePath.isFile()) {if (filePath.delete()) {result = true;} else {result = false;break;}} else if (filePath.exists() && filePath.isDirectory()) {if (delDir(filePath)) {result = true;} else {result = false;break;}}}}folder.delete();} catch (Exception e) {e.printStackTrace();result = false;}return result;}