1：依赖 compile ‘commons-io:commons-io:2.5‘
可使用FileUtils里的各种文件处理方法
2：文件处理类DirTraversal
** * 文件夹遍历 * @author miaowei * */public class DirTraversal {
//no recursion public static LinkedList<File> listLinkedFiles(String strPath) { LinkedList<File> list = new LinkedList<File>(); File dir = new File(strPath); File file[] = dir.listFiles(); for (int i = 0; i < file.length; i++) { /*if (file[i].isDirectory()){
list.add(file[i]); }else{
System.out.println(file[i].getAbsolutePath());
}*/ list.add(file[i]); } /*File tmp; while (!list.isEmpty()) { tmp = (File) list.removeFirst(); if (tmp.isDirectory()) { file = tmp.listFiles(); if (file == null) continue; for (int i = 0; i < file.length; i++) { if (file[i].isDirectory()) list.add(file[i]); else System.out.println(file[i].getAbsolutePath()); } } else { System.out.println(tmp.getAbsolutePath()); } }*/ return list; }
//recursion public static ArrayList<File> listFiles(String strPath) { return refreshFileList(strPath); }
public static ArrayList<File> refreshFileList(String strPath) { ArrayList<File> filelist = new ArrayList<File>(); File dir = new File(strPath); File[] files = dir.listFiles();
if (files == null) return null; for (int i = 0; i < files.length; i++) { if (files[i].isDirectory()) { refreshFileList(files[i].getAbsolutePath()); } else { if(files[i].getName().toLowerCase().endsWith("zip")){
filelist.add(files[i]); }
} } return filelist; }
public static ArrayList<File> arrayListFiles(String strPath){
ArrayList<File> filelist = new ArrayList<File>(); File dir = new File(strPath); File[] files = dir.listFiles(); for (int i = 0; i < files.length; i++) {
filelist.add(files[i].getAbsoluteFile()); } return filelist; } //-----4.0读取文件的报 open failed: ENOENT (No such file or directory) /** * 1\可先创建文件的路径 * @param filePath */ public static void makeRootDirectory(String filePath) { File file = null; try { file = new File(filePath); if (!file.exists()) { file.mkdir(); } } catch (Exception e) { e.printStackTrace(); } } /** * 2\然后在创建文件名就不会在报该错误 * @param filePath * @param fileName * @return */ public static File getFilePath(String filePath, String fileName) { File file = null; makeRootDirectory(filePath); try { file = new File(filePath + fileName); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return file; } /** * 删除文件夹以及目录下的文件 * @param filePath 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 filePath) { boolean flag = false; //如果filePath不以文件分隔符结尾，自动添加文件分隔符 if (!filePath.endsWith(File.separator)) { filePath = filePath + File.separator; } File dirFile = new File(filePath); if (!dirFile.exists() || !dirFile.isDirectory()) { return false; } flag = true; File[] files = dirFile.listFiles(); //遍历删除文件夹下的所有文件(包括子目录) for (int i = 0; i < files.length; i++) { if (files[i].isFile()) { //删除子文件 flag = deleteFile(files[i].getAbsolutePath()); if (!flag) break; } else { //删除子目录 flag = deleteDirectory(files[i].getAbsolutePath()); if (!flag) break; } } if (!flag) return false; //删除当前空目录 return dirFile.delete(); }
3：压缩，解压类ZipUtils
/** * Java utils 实现的Zip工具 * @author miaowei * */public class ZipUtils {
private static final int BUFF_SIZE = 1024 * 1024; // 1M Byte
/** * 批量压缩文件（夹） * * @param resFileList 要压缩的文件（夹）列表 * @param zipFile 生成的压缩文件 * @throws IOException 当压缩过程出错时抛出 */ public static void zipFiles(Collection<File> resFileList, File zipFile) throws IOException { ZipOutputStream zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile), BUFF_SIZE)); for (File resFile : resFileList) { zipFile(resFile, zipout, ""); } zipout.close(); }
/** * 批量压缩文件（夹） * * @param resFileList 要压缩的文件（夹）列表 * @param zipFile 生成的压缩文件 * @param comment 压缩文件的注释 * @throws IOException 当压缩过程出错时抛出 */ public static void zipFiles(Collection<File> resFileList, File zipFile, String comment) throws IOException { ZipOutputStream zipout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream( zipFile), BUFF_SIZE)); for (File resFile : resFileList) { zipFile(resFile, zipout, ""); } zipout.setComment(comment); zipout.close(); }
/** * 解压缩一个文件 * * @param zipFile 压缩文件 * @param folderPath 解压缩的目标目录 * @throws IOException 当解压缩过程出错时抛出 */ public static void upZipFile(File zipFile, String folderPath) throws ZipException, IOException { File desDir = new File(folderPath); if (!desDir.exists()) { desDir.mkdirs(); } ZipFile zf = new ZipFile(zipFile); for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements();) { ZipEntry entry = ((ZipEntry)entries.nextElement()); if (entry.isDirectory()) {
continue; } InputStream in = zf.getInputStream(entry); String str = folderPath + File.separator + entry.getName(); str = new String(str.getBytes(), "utf-8"); File desFile = new File(str); if (!desFile.exists()) { File fileParentDir = desFile.getParentFile(); if (!fileParentDir.exists()) { fileParentDir.mkdirs(); } desFile.createNewFile(); } OutputStream out = new FileOutputStream(desFile); byte buffer[] = new byte[BUFF_SIZE]; int realLength; while ((realLength = in.read(buffer)) > 0) { out.write(buffer, 0, realLength); } in.close(); out.close(); } }
/** * 解压文件名包含传入文字的文件 * * @param zipFile 压缩文件 * @param folderPath 目标文件夹 * @param nameContains 传入的文件匹配名 * @throws ZipException 压缩格式有误时抛出 * @throws IOException IO错误时抛出 */ public static ArrayList<File> upZipSelectedFile(File zipFile, String folderPath, String nameContains) throws ZipException, IOException { ArrayList<File> fileList = new ArrayList<File>();
File desDir = new File(folderPath); if (!desDir.exists()) { desDir.mkdir(); }
ZipFile zf = new ZipFile(zipFile); for (Enumeration<?> entries = zf.entries(); entries.hasMoreElements();) { ZipEntry entry = ((ZipEntry)entries.nextElement()); if (entry.getName().contains(nameContains)) { InputStream in = zf.getInputStream(entry); String str = folderPath + File.separator + entry.getName(); str = new String(str.getBytes("utf-8"), "gbk"); // str.getBytes("GB2312"),"8859_1" 输出 // str.getBytes("8859_1"),"GB2312" 输入 File desFile = new File(str); if (!desFile.exists()) { File fileParentDir = desFile.getParentFile(); if (!fileParentDir.exists()) { fileParentDir.mkdirs(); } desFile.createNewFile(); } OutputStream out = new FileOutputStream(desFile); byte buffer[] = new byte[BUFF_SIZE]; int realLength; while ((realLength = in.read(buffer)) > 0) { out.write(buffer, 0, realLength); } in.close(); out.close(); fileList.add(desFile); } } return fileList; }
/** * 获得压缩文件内文件列表 * * @param zipFile 压缩文件 * @return 压缩文件内文件名称 * @throws ZipException 压缩文件格式有误时抛出 * @throws IOException 当解压缩过程出错时抛出 */ public static ArrayList<String> getEntriesNames(File zipFile) throws ZipException, IOException { ArrayList<String> entryNames = new ArrayList<String>(); Enumeration<?> entries = getEntriesEnumeration(zipFile); while (entries.hasMoreElements()) { ZipEntry entry = ((ZipEntry)entries.nextElement()); entryNames.add(new String(getEntryName(entry).getBytes("GB2312"), "8859_1")); } return entryNames; } /** * 获得压缩文件内压缩文件对象以取得其属性 * * @param zipFile 压缩文件 * @return 返回一个压缩文件列表 * @throws ZipException 压缩文件格式有误时抛出 * @throws IOException IO操作有误时抛出 */ public static Enumeration<?> getEntriesEnumeration(File zipFile) throws ZipException, IOException { ZipFile zf = new ZipFile(zipFile); return zf.entries(); } /** * 取得压缩文件对象的注释 * * @param entry 压缩文件对象 * @return 压缩文件对象的注释 * @throws UnsupportedEncodingException */ public static String getEntryComment(ZipEntry entry) throws UnsupportedEncodingException { return new String(entry.getComment().getBytes("GB2312"), "8859_1"); } /** * 取得压缩文件对象的名称 * * @param entry 压缩文件对象 * @return 压缩文件对象的名称 * @throws UnsupportedEncodingException */ public static String getEntryName(ZipEntry entry) throws UnsupportedEncodingException { return new String(entry.getName().getBytes("GB2312"), "8859_1"); } /** * 压缩文件 * * @param resFile 需要压缩的文件（夹） * @param zipout 压缩的目的文件 * @param rootpath 压缩的文件路径 * @throws FileNotFoundException 找不到文件时抛出 * @throws IOException 当压缩过程出错时抛出 */ private static void zipFile(File resFile, ZipOutputStream zipout, String rootpath) throws FileNotFoundException, IOException { rootpath = rootpath + (rootpath.trim().length() == 0 ? "" : File.separator) + resFile.getName(); rootpath = new String(rootpath.getBytes(), "utf-8"); if (resFile.isDirectory()) { File[] fileList = resFile.listFiles(); for (File file : fileList) { zipFile(file, zipout, rootpath); } } else { byte buffer[] = new byte[BUFF_SIZE]; BufferedInputStream in = new BufferedInputStream(new FileInputStream(resFile), BUFF_SIZE); zipout.putNextEntry(new ZipEntry(rootpath)); int realLength; while ((realLength = in.read(buffer)) != -1) { zipout.write(buffer, 0, realLength); } in.close(); zipout.flush(); zipout.closeEntry(); } } //第二种实现 public static void zip(String src, String dest) throws IOException { // 提供了一个数据项压缩成一个ZIP归档输出流 ZipOutputStream out = null; try { //DirTraversal.makeRootDirectory(dest); //File outFile = DirTraversal.getFilePath(dest,"cache.zip"); File outFile = new File(dest);// 源文件或者目录 File fileOrDirectory = new File(src);// 压缩文件路径 out = new ZipOutputStream(new FileOutputStream(outFile)); // 如果此文件是一个文件，否则为false。 if (fileOrDirectory.isFile()) { zipFileOrDirectory(out, fileOrDirectory, ""); } else { // 返回一个文件或空阵列。 File[] entries = fileOrDirectory.listFiles(); for (int i = 0; i < entries.length; i++) { // 递归压缩，更新curPaths zipFileOrDirectory(out, entries[i], ""); } } } catch (IOException ex) { ex.printStackTrace(); } finally { // 关闭输出流 if (out != null) { try { out.close(); } catch (IOException ex) { ex.printStackTrace(); } } } } private static void zipFileOrDirectory(ZipOutputStream out, File fileOrDirectory, String curPath) throws IOException { // 从文件中读取字节的输入流 FileInputStream in = null; try { // 如果此文件是一个目录，否则返回false。 if (!fileOrDirectory.isDirectory()) { // 压缩文件 byte[] buffer = new byte[4096]; int bytes_read; in = new FileInputStream(fileOrDirectory); // 实例代表一个条目内的ZIP归档 ZipEntry entry = new ZipEntry(curPath + fileOrDirectory.getName()); // 条目的信息写入底层流 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curPaths zipFileOrDirectory(out, entries[i], curPath + fileOrDirectory.getName() + "/"); } } } catch (IOException ex) { ex.printStackTrace(); // throw ex; } finally { if (in != null) { try { in.close(); } catch (IOException ex) { ex.printStackTrace(); } } } } @SuppressWarnings("unchecked") public static void unzip(String zipFileName, String outputDirectory) throws IOException { ZipFile zipFile = null; try { zipFile = new ZipFile(zipFileName); Enumeration e = zipFile.entries(); ZipEntry zipEntry = null; File dest = new File(outputDirectory); dest.mkdirs(); while (e.hasMoreElements()) { zipEntry = (ZipEntry) e.nextElement(); String entryName = zipEntry.getName(); InputStream in = null; FileOutputStream out = null; try { if (zipEntry.isDirectory()) { String name = zipEntry.getName(); name = name.substring(0, name.length() - 1); File f = new File(outputDirectory + File.separator + name); f.mkdirs(); } else { int index = entryName.lastIndexOf("\\"); if (index != -1) { File df = new File(outputDirectory + File.separator + entryName.substring(0, index)); df.mkdirs(); } index = entryName.lastIndexOf("/"); if (index != -1) { File df = new File(outputDirectory + File.separator + entryName.substring(0, index)); df.mkdirs(); } File f = new File(outputDirectory + File.separator + zipEntry.getName()); // f.createNewFile(); in = zipFile.getInputStream(zipEntry); out = new FileOutputStream(f); int c; byte[] by = new byte[1024]; while ((c = in.read(by)) != -1) { out.write(by, 0, c); } out.flush(); } } catch (IOException ex) { ex.printStackTrace(); throw new IOException("解压失败：" + ex.toString()); } finally { if (in != null) { try { in.close(); } catch (IOException ex) { } } if (out != null) { try { out.close(); } catch (IOException ex) { } } } } } catch (IOException ex) { ex.printStackTrace(); throw new IOException("解压失败：" + ex.toString()); } finally { if (zipFile != null) { try { zipFile.close(); } catch (IOException ex) { } } } } public static void copy(Context myContext, String ASSETS_NAME, String savePath, String saveName) { String filename = savePath + "/" + saveName; File dir = new File(savePath); // 如果目录不中存在，创建这个目录 if (!dir.exists()) dir.mkdir(); try { if (!(new File(filename)).exists()) { InputStream is = myContext.getResources().getAssets() .open(ASSETS_NAME); FileOutputStream fos = new FileOutputStream(filename); byte[] buffer = new byte[7168]; int count = 0; while ((count = is.read(buffer)) > 0) { fos.write(buffer, 0, count); } fos.close(); is.close(); } } catch (Exception e) { e.printStackTrace(); } } public static Boolean CopyAssetsDir(Context context,String src,String des) { //复制安卓Assets下的“非空目录”到des文件夹，注意是否对des有写权限 Boolean isSuccess = true; String[] files; try { files = context.getAssets().list(src); } catch (IOException e1) { return false; } if(files.length==0){ isSuccess = CopyAssetsFile(context,src,des);//对于文件直接复制 if(!isSuccess) return isSuccess; } else{ File srcfile = new File(des+"/"+src); if(!srcfile.exists()){ if(srcfile.mkdirs()){//对于目录自行创建 for(int i=0;i<files.length;i++){//新浪博客的限制，这里的小于号请自行替换为英文的 isSuccess = CopyAssetsDir(context,src + "/"+files[i], des);//递归调用 if(!isSuccess) return isSuccess; } } else{ return false; } } } return isSuccess; } public static Boolean CopyAssetsFile(Context context,String filename, String des) { Boolean isSuccess = true; //复制安卓apk的assets目录下任意路径的单个文件到des文件夹，注意是否对des有写权限 AssetManager assetManager = context.getAssets(); InputStream in = null; OutputStream out = null; try { in = assetManager.open(filename); String newFileName = des + "/" + filename; out = new FileOutputStream(newFileName); byte[] buffer = new byte[1024]; int read; while ((read = in.read(buffer)) != -1) { out.write(buffer, 0, read); } in.close(); in = null; out.flush(); out.close(); out = null; } catch (Exception e) { e.printStackTrace(); isSuccess = false; } return isSuccess; }}
时间： 2024-10-05 07:11:30