Java tutorial
/* * Copyright (C) 2012 www.amsoft.cn * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.bnrc.util; import java.io.BufferedReader; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.DataInputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.Comparator; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.apache.http.Header; import org.apache.http.HttpResponse; import android.content.Context; import android.content.pm.PackageInfo; import android.content.res.AssetManager; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.drawable.Drawable; import android.os.Environment; import android.os.StatFs; import com.bnrc.global.AbAppConfig; // TODO: Auto-generated Javadoc /** * ? 2012 amsoft.cn * ?bFileUtil.java * ?. * * @author ? * @version v1.0 * @date2013-01-18 ?11:52:13 */ public class AbFileUtil { /** APP??. */ private static String downloadRootDir = null; /** ????. */ private static String imageDownloadDir = null; /** ???. */ private static String fileDownloadDir = null; /** ??. */ private static String cacheDownloadDir = null; /** ???????. */ private static String dbDownloadDir = null; /** ?200M?D. */ private static int freeSdSpaceNeededToCache = 200 * 1024 * 1024; /** * ????D???D??. * @param url ???? * @param type ????????bImageUtil * ????????????? * @param desiredWidth ??? * @param desiredHeight ??? * @return Bitmap ??? */ public static Bitmap getBitmapFromSD(String url, int type, int desiredWidth, int desiredHeight) { Bitmap bitmap = null; try { if (AbStrUtil.isEmpty(url)) { return null; } //SD? ?????D? if (!isCanUseSD() || freeSdSpaceNeededToCache < freeSpaceOnSD()) { bitmap = getBitmapFromURL(url, type, desiredWidth, desiredHeight); return bitmap; } //??????????? String downFilePath = downloadFile(url, imageDownloadDir); if (downFilePath != null) { //? return getBitmapFromSD(new File(downFilePath), type, desiredWidth, desiredHeight); } else { return null; } } catch (Exception e) { e.printStackTrace(); } return bitmap; } /** * ?????D???. * * @param file the file * @param type ????????bConstant * ????????????? * @param desiredWidth ??? * @param desiredHeight ??? * @return Bitmap ??? */ public static Bitmap getBitmapFromSD(File file, int type, int desiredWidth, int desiredHeight) { Bitmap bitmap = null; try { //SD??? if (!isCanUseSD()) { return null; } //??? if (!file.exists()) { return null; } //? if (type == AbImageUtil.CUTIMG) { bitmap = AbImageUtil.getCutBitmap(file, desiredWidth, desiredHeight); } else if (type == AbImageUtil.SCALEIMG) { bitmap = AbImageUtil.getScaleBitmap(file, desiredWidth, desiredHeight); } else { bitmap = AbImageUtil.getBitmap(file); } } catch (Exception e) { e.printStackTrace(); } return bitmap; } /** * ?????D???. * * @param file the file * @return Bitmap ? */ public static Bitmap getBitmapFromSD(File file) { Bitmap bitmap = null; try { //SD??? if (!isCanUseSD()) { return null; } //??? if (!file.exists()) { return null; } //? bitmap = AbImageUtil.getBitmap(file); } catch (Exception e) { e.printStackTrace(); } return bitmap; } /** * ??yte[]??????. * @param imgByte ??yte[]? * @param fileName ???.jpg * @param type ????????bConstant * @param desiredWidth ??? * @param desiredHeight ??? * @return Bitmap ??? */ public static Bitmap getBitmapFromByte(byte[] imgByte, String fileName, int type, int desiredWidth, int desiredHeight) { FileOutputStream fos = null; DataInputStream dis = null; ByteArrayInputStream bis = null; Bitmap bitmap = null; File file = null; try { if (imgByte != null) { file = new File(imageDownloadDir + fileName); if (!file.exists()) { file.createNewFile(); } fos = new FileOutputStream(file); int readLength = 0; bis = new ByteArrayInputStream(imgByte); dis = new DataInputStream(bis); byte[] buffer = new byte[1024]; while ((readLength = dis.read(buffer)) != -1) { fos.write(buffer, 0, readLength); try { Thread.sleep(500); } catch (Exception e) { } } fos.flush(); bitmap = getBitmapFromSD(file, type, desiredWidth, desiredHeight); } } catch (Exception e) { e.printStackTrace(); } finally { if (dis != null) { try { dis.close(); } catch (Exception e) { } } if (bis != null) { try { bis.close(); } catch (Exception e) { } } if (fos != null) { try { fos.close(); } catch (Exception e) { } } } return bitmap; } /** * RL???. * @param url ???? * @param type ????????bConstant * @param desiredWidth ??? * @param desiredHeight ??? * @return Bitmap ??? */ public static Bitmap getBitmapFromURL(String url, int type, int desiredWidth, int desiredHeight) { Bitmap bit = null; try { bit = AbImageUtil.getBitmap(url, type, desiredWidth, desiredHeight); } catch (Exception e) { AbLogUtil.d(AbFileUtil.class, "?" + e.getMessage()); } return bit; } /** * ????rc?. * * @param src ??rcmage/arrow.png * @return Bitmap ? */ public static Bitmap getBitmapFromSrc(String src) { Bitmap bit = null; try { bit = BitmapFactory.decodeStream(AbFileUtil.class.getResourceAsStream(src)); } catch (Exception e) { AbLogUtil.d(AbFileUtil.class, "?" + e.getMessage()); } return bit; } /** * ??sset?. * * @param context the context * @param fileName the file name * @return Bitmap ? */ public static Bitmap getBitmapFromAsset(Context context, String fileName) { Bitmap bit = null; try { AssetManager assetManager = context.getAssets(); InputStream is = assetManager.open(fileName); bit = BitmapFactory.decodeStream(is); } catch (Exception e) { AbLogUtil.d(AbFileUtil.class, "?" + e.getMessage()); } return bit; } /** * ??sset?. * * @param context the context * @param fileName the file name * @return Drawable ? */ public static Drawable getDrawableFromAsset(Context context, String fileName) { Drawable drawable = null; try { AssetManager assetManager = context.getAssets(); InputStream is = assetManager.open(fileName); drawable = Drawable.createFromStream(is, null); } catch (Exception e) { AbLogUtil.d(AbFileUtil.class, "?" + e.getMessage()); } return drawable; } /** * ???D?.?SD?? * * @param url ???? * @param dirPath the dir path * @return ???? */ public static String downloadFile(String url, String dirPath) { InputStream in = null; FileOutputStream fileOutputStream = null; HttpURLConnection connection = null; String downFilePath = null; File file = null; try { if (!isCanUseSD()) { return null; } //????D??????? String fileNameNoMIME = getCacheFileNameFromUrl(url); File parentFile = new File(imageDownloadDir); File[] files = parentFile.listFiles(); for (int i = 0; i < files.length; ++i) { String fileName = files[i].getName(); String name = fileName.substring(0, fileName.lastIndexOf(".")); if (name.equals(fileNameNoMIME)) { //??? return files[i].getPath(); } } URL mUrl = new URL(url); connection = (HttpURLConnection) mUrl.openConnection(); connection.connect(); //????? String fileName = getCacheFileNameFromUrl(url, connection); file = new File(imageDownloadDir, fileName); downFilePath = file.getPath(); if (!file.exists()) { file.createNewFile(); } else { //??? return file.getPath(); } in = connection.getInputStream(); fileOutputStream = new FileOutputStream(file); byte[] b = new byte[1024]; int temp = 0; while ((temp = in.read(b)) != -1) { fileOutputStream.write(b, 0, temp); } } catch (Exception e) { e.printStackTrace(); AbLogUtil.e(AbFileUtil.class, "??,?"); //????,??0B??? if (file != null) { file.delete(); } file = null; downFilePath = null; } finally { try { if (in != null) { in.close(); } } catch (Exception e) { e.printStackTrace(); } try { if (fileOutputStream != null) { fileOutputStream.close(); } } catch (Exception e) { e.printStackTrace(); } try { if (connection != null) { connection.disconnect(); } } catch (Exception e) { e.printStackTrace(); } } return downFilePath; } /** * ????. * * @param Url ??? * @return int ????? */ public static int getContentLengthFromUrl(String Url) { int mContentLength = 0; try { URL url = new URL(Url); HttpURLConnection mHttpURLConnection = (HttpURLConnection) url.openConnection(); mHttpURLConnection.setConnectTimeout(5 * 1000); mHttpURLConnection.setRequestMethod("GET"); mHttpURLConnection.setRequestProperty("Accept", "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*"); mHttpURLConnection.setRequestProperty("Accept-Language", "zh-CN"); mHttpURLConnection.setRequestProperty("Referer", Url); mHttpURLConnection.setRequestProperty("Charset", "UTF-8"); mHttpURLConnection.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)"); mHttpURLConnection.setRequestProperty("Connection", "Keep-Alive"); mHttpURLConnection.connect(); if (mHttpURLConnection.getResponseCode() == 200) { // ?????? mContentLength = mHttpURLConnection.getContentLength(); } } catch (Exception e) { e.printStackTrace(); AbLogUtil.d(AbFileUtil.class, "" + e.getMessage()); } return mContentLength; } /** * ????. * @param url ??? * @return ?? */ public static String getRealFileNameFromUrl(String url) { String name = null; try { if (AbStrUtil.isEmpty(url)) { return name; } URL mUrl = new URL(url); HttpURLConnection mHttpURLConnection = (HttpURLConnection) mUrl.openConnection(); mHttpURLConnection.setConnectTimeout(5 * 1000); mHttpURLConnection.setRequestMethod("GET"); mHttpURLConnection.setRequestProperty("Accept", "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*"); mHttpURLConnection.setRequestProperty("Accept-Language", "zh-CN"); mHttpURLConnection.setRequestProperty("Referer", url); mHttpURLConnection.setRequestProperty("Charset", "UTF-8"); mHttpURLConnection.setRequestProperty("User-Agent", ""); mHttpURLConnection.setRequestProperty("Connection", "Keep-Alive"); mHttpURLConnection.connect(); if (mHttpURLConnection.getResponseCode() == 200) { for (int i = 0;; i++) { String mine = mHttpURLConnection.getHeaderField(i); if (mine == null) { break; } if ("content-disposition".equals(mHttpURLConnection.getHeaderFieldKey(i).toLowerCase())) { Matcher m = Pattern.compile(".*filename=(.*)").matcher(mine.toLowerCase()); if (m.find()) return m.group(1).replace("\"", ""); } } } } catch (Exception e) { e.printStackTrace(); AbLogUtil.e(AbFileUtil.class, "??"); } return name; } /** * ????xx.??. * @param connection ? * @return ?? */ public static String getRealFileName(HttpURLConnection connection) { String name = null; try { if (connection == null) { return name; } if (connection.getResponseCode() == 200) { for (int i = 0;; i++) { String mime = connection.getHeaderField(i); if (mime == null) { break; } // "Content-Disposition","attachment; filename=1.txt" // Content-Length if ("content-disposition".equals(connection.getHeaderFieldKey(i).toLowerCase())) { Matcher m = Pattern.compile(".*filename=(.*)").matcher(mime.toLowerCase()); if (m.find()) { return m.group(1).replace("\"", ""); } } } } } catch (Exception e) { e.printStackTrace(); AbLogUtil.e(AbFileUtil.class, "??"); } return name; } /** * ????xx.??. * * @param response the response * @return ?? */ public static String getRealFileName(HttpResponse response) { String name = null; try { if (response == null) { return name; } //?? Header[] headers = response.getHeaders("content-disposition"); for (int i = 0; i < headers.length; i++) { Matcher m = Pattern.compile(".*filename=(.*)").matcher(headers[i].getValue()); if (m.find()) { name = m.group(1).replace("\"", ""); } } } catch (Exception e) { e.printStackTrace(); AbLogUtil.e(AbFileUtil.class, "??"); } return name; } /** * ????. * * @param url ??? * @return ?? */ public static String getCacheFileNameFromUrl(String url) { if (AbStrUtil.isEmpty(url)) { return null; } String name = null; try { name = AbMd5.MD5(url); } catch (Exception e) { e.printStackTrace(); } return name; } /** * ???.???. * * @param url ??? * @param response the response * @return ?? */ public static String getCacheFileNameFromUrl(String url, HttpResponse response) { if (AbStrUtil.isEmpty(url)) { return null; } String name = null; try { //? String suffix = getMIMEFromUrl(url, response); if (AbStrUtil.isEmpty(suffix)) { suffix = ".ab"; } name = AbMd5.MD5(url) + suffix; } catch (Exception e) { e.printStackTrace(); } return name; } /** * ???.???. * * @param url ??? * @param connection the connection * @return ?? */ public static String getCacheFileNameFromUrl(String url, HttpURLConnection connection) { if (AbStrUtil.isEmpty(url)) { return null; } String name = null; try { //? String suffix = getMIMEFromUrl(url, connection); if (AbStrUtil.isEmpty(suffix)) { suffix = ".ab"; } name = AbMd5.MD5(url) + suffix; } catch (Exception e) { e.printStackTrace(); } return name; } /** * ???. * * @param url ??? * @param connection the connection * @return ?? */ public static String getMIMEFromUrl(String url, HttpURLConnection connection) { if (AbStrUtil.isEmpty(url)) { return null; } String suffix = null; try { //? if (url.lastIndexOf(".") != -1) { suffix = url.substring(url.lastIndexOf(".")); if (suffix.indexOf("/") != -1 || suffix.indexOf("?") != -1 || suffix.indexOf("&") != -1) { suffix = null; } } if (AbStrUtil.isEmpty(suffix)) { //?? ???? String fileName = getRealFileName(connection); if (fileName != null && fileName.lastIndexOf(".") != -1) { suffix = fileName.substring(fileName.lastIndexOf(".")); } } } catch (Exception e) { e.printStackTrace(); } return suffix; } /** * ????. * * @param url ??? * @param response the response * @return ?? */ public static String getMIMEFromUrl(String url, HttpResponse response) { if (AbStrUtil.isEmpty(url)) { return null; } String mime = null; try { //? if (url.lastIndexOf(".") != -1) { mime = url.substring(url.lastIndexOf(".")); if (mime.indexOf("/") != -1 || mime.indexOf("?") != -1 || mime.indexOf("&") != -1) { mime = null; } } if (AbStrUtil.isEmpty(mime)) { //?? ???? String fileName = getRealFileName(response); if (fileName != null && fileName.lastIndexOf(".") != -1) { mime = fileName.substring(fileName.lastIndexOf(".")); } } } catch (Exception e) { e.printStackTrace(); } return mime; } /** * sd???byte[]. * * @param path sd?? * @return byte[] */ public static byte[] getByteArrayFromSD(String path) { byte[] bytes = null; ByteArrayOutputStream out = null; try { File file = new File(path); //SD??? if (!isCanUseSD()) { return null; } //??? if (!file.exists()) { return null; } long fileSize = file.length(); if (fileSize > Integer.MAX_VALUE) { return null; } FileInputStream in = new FileInputStream(path); out = new ByteArrayOutputStream(1024); byte[] buffer = new byte[1024]; int size = 0; while ((size = in.read(buffer)) != -1) { out.write(buffer, 0, size); } in.close(); bytes = out.toByteArray(); } catch (Exception e) { e.printStackTrace(); } finally { if (out != null) { try { out.close(); } catch (Exception e) { } } } return bytes; } /** * byte????????. * * @param path the path * @param content the content * @param create the create */ public static void writeByteArrayToSD(String path, byte[] content, boolean create) { FileOutputStream fos = null; try { File file = new File(path); //SD??? if (!isCanUseSD()) { return; } //??? if (!file.exists()) { if (create) { File parent = file.getParentFile(); if (!parent.exists()) { parent.mkdirs(); file.createNewFile(); } } else { return; } } fos = new FileOutputStream(path); fos.write(content); } catch (Exception e) { e.printStackTrace(); } finally { if (fos != null) { try { fos.close(); } catch (Exception e) { } } } } /** * D????. * * @return true ?,false? */ public static boolean isCanUseSD() { try { return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED); } catch (Exception e) { e.printStackTrace(); } return false; } /** * ????. * * @param context the context */ public static void initFileDir(Context context) { PackageInfo info = AbAppUtil.getPackageInfo(context); //???. String downloadRootPath = File.separator + AbAppConfig.DOWNLOAD_ROOT_DIR + File.separator + info.packageName + File.separator; //????. String imageDownloadPath = downloadRootPath + AbAppConfig.DOWNLOAD_IMAGE_DIR + File.separator; //???. String fileDownloadPath = downloadRootPath + AbAppConfig.DOWNLOAD_FILE_DIR + File.separator; //??. String cacheDownloadPath = downloadRootPath + AbAppConfig.CACHE_DIR + File.separator; //DB??. String dbDownloadPath = downloadRootPath + AbAppConfig.DB_DIR + File.separator; try { if (!isCanUseSD()) { return; } else { File root = Environment.getExternalStorageDirectory(); File downloadDir = new File(root.getAbsolutePath() + downloadRootPath); if (!downloadDir.exists()) { downloadDir.mkdirs(); } downloadRootDir = downloadDir.getPath(); File cacheDownloadDirFile = new File(root.getAbsolutePath() + cacheDownloadPath); if (!cacheDownloadDirFile.exists()) { cacheDownloadDirFile.mkdirs(); } cacheDownloadDir = cacheDownloadDirFile.getPath(); File imageDownloadDirFile = new File(root.getAbsolutePath() + imageDownloadPath); if (!imageDownloadDirFile.exists()) { imageDownloadDirFile.mkdirs(); } imageDownloadDir = imageDownloadDirFile.getPath(); File fileDownloadDirFile = new File(root.getAbsolutePath() + fileDownloadPath); if (!fileDownloadDirFile.exists()) { fileDownloadDirFile.mkdirs(); } fileDownloadDir = fileDownloadDirFile.getPath(); File dbDownloadDirFile = new File(root.getAbsolutePath() + dbDownloadPath); if (!dbDownloadDirFile.exists()) { dbDownloadDirFile.mkdirs(); } dbDownloadDir = dbDownloadDirFile.getPath(); } } catch (Exception e) { e.printStackTrace(); } } /** * ?sdcard?. * * @return the int */ public static int freeSpaceOnSD() { StatFs stat = new StatFs(Environment.getExternalStorageDirectory().getPath()); double sdFreeMB = ((double) stat.getAvailableBlocks() * (double) stat.getBlockSize()) / 1024 * 1024; return (int) sdFreeMB; } /** * ??????????. */ public static class FileLastModifSort implements Comparator<File> { /* (non-Javadoc) * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object) */ public int compare(File arg0, File arg1) { if (arg0.lastModified() > arg1.lastModified()) { return 1; } else if (arg0.lastModified() == arg1.lastModified()) { return 0; } else { return -1; } } } /** * ??. * * @return true, if successful */ public static boolean clearDownloadFile() { try { File fileDirectory = new File(downloadRootDir); deleteFile(fileDirectory); } catch (Exception e) { e.printStackTrace(); return false; } return true; } /** * ??. * * @return true, if successful */ public static boolean deleteFile(File file) { try { if (!isCanUseSD()) { return false; } if (file == null) { return true; } if (file.isDirectory()) { File[] files = file.listFiles(); for (int i = 0; i < files.length; i++) { deleteFile(files[i]); } } else { file.delete(); } } catch (Exception e) { e.printStackTrace(); return false; } return true; } /** * ?ssets???. * * @param context the context * @param name the name * @param encoding the encoding * @return the string */ public static String readAssetsByName(Context context, String name, String encoding) { String text = null; InputStreamReader inputReader = null; BufferedReader bufReader = null; try { inputReader = new InputStreamReader(context.getAssets().open(name)); bufReader = new BufferedReader(inputReader); String line = null; StringBuffer buffer = new StringBuffer(); while ((line = bufReader.readLine()) != null) { buffer.append(line); } text = new String(buffer.toString().getBytes(), encoding); } catch (Exception e) { e.printStackTrace(); } finally { try { if (bufReader != null) { bufReader.close(); } if (inputReader != null) { inputReader.close(); } } catch (Exception e) { e.printStackTrace(); } } return text; } /** * ?aw???. * * @param context the context * @param id the id * @param encoding the encoding * @return the string */ public static String readRawByName(Context context, int id, String encoding) { String text = null; InputStreamReader inputReader = null; BufferedReader bufReader = null; try { inputReader = new InputStreamReader(context.getResources().openRawResource(id)); bufReader = new BufferedReader(inputReader); String line = null; StringBuffer buffer = new StringBuffer(); while ((line = bufReader.readLine()) != null) { buffer.append(line); } text = new String(buffer.toString().getBytes(), encoding); } catch (Exception e) { e.printStackTrace(); } finally { try { if (bufReader != null) { bufReader.close(); } if (inputReader != null) { inputReader.close(); } } catch (Exception e) { e.printStackTrace(); } } return text; } /** * Gets the download root dir. * * @param context the context * @return the download root dir */ public static String getDownloadRootDir(Context context) { if (downloadRootDir == null) { initFileDir(context); } return downloadRootDir; } /** * Gets the image download dir. * * @param context the context * @return the image download dir */ public static String getImageDownloadDir(Context context) { if (downloadRootDir == null) { initFileDir(context); } return imageDownloadDir; } /** * Gets the file download dir. * * @param context the context * @return the file download dir */ public static String getFileDownloadDir(Context context) { if (downloadRootDir == null) { initFileDir(context); } return fileDownloadDir; } /** * Gets the cache download dir. * * @param context the context * @return the cache download dir */ public static String getCacheDownloadDir(Context context) { if (downloadRootDir == null) { initFileDir(context); } return cacheDownloadDir; } /** * Gets the db download dir. * * @param context the context * @return the db download dir */ public static String getDbDownloadDir(Context context) { if (downloadRootDir == null) { initFileDir(context); } return dbDownloadDir; } /** * Gets the free sd space needed to cache. * * @return the free sd space needed to cache */ public static int getFreeSdSpaceNeededToCache() { return freeSdSpaceNeededToCache; } }