List of usage examples for java.io FileInputStream read
public int read(byte b[], int off, int len) throws IOException
len bytes of data from this input stream into an array of bytes. From source file:JarUtils.java
/** * This recursive method writes all matching files and directories to * the jar output stream./* w ww. j a v a 2 s . c o m*/ */ private static void jar(File src, String prefix, JarInfo info) throws IOException { JarOutputStream jout = info.out; if (src.isDirectory()) { // create / init the zip entry prefix = prefix + src.getName() + "/"; ZipEntry entry = new ZipEntry(prefix); entry.setTime(src.lastModified()); entry.setMethod(JarOutputStream.STORED); entry.setSize(0L); entry.setCrc(0L); jout.putNextEntry(entry); jout.closeEntry(); // process the sub-directories File[] files = src.listFiles(info.filter); for (int i = 0; i < files.length; i++) { jar(files[i], prefix, info); } } else if (src.isFile()) { // get the required info objects byte[] buffer = info.buffer; // create / init the zip entry ZipEntry entry = new ZipEntry(prefix + src.getName()); entry.setTime(src.lastModified()); jout.putNextEntry(entry); // dump the file FileInputStream in = new FileInputStream(src); int len; while ((len = in.read(buffer, 0, buffer.length)) != -1) { jout.write(buffer, 0, len); } in.close(); jout.closeEntry(); } }
From source file:com.flexive.shared.media.FxMediaEngine.java
/** * Identify a file, returning metadata//w w w. j a v a 2 s . co m * * @param mimeType if not null it will be used to call the correct identify routine * @param file the file to identify * @return metadata */ public static FxMetadata identify(String mimeType, File file) { if (mimeType == null) { byte[] header = new byte[5]; //read the first 5 bytes if (file.length() > 5) { FileInputStream fis = null; try { fis = new FileInputStream(file); if (fis.read(header, 0, 5) != 5) header = null; } catch (IOException e) { LOG.error(e); } finally { try { if (fis != null) fis.close(); } catch (IOException e) { LOG.error(e); } } } mimeType = detectMimeType(header, file.getName()); } // image file identification if (mimeType.startsWith("image")) { try { //try native first return FxMediaNativeEngine.identify(mimeType, file); } catch (FxApplicationException e) { if (FxMediaImageMagickEngine.IM_IDENTIFY_POSSIBLE) { try { return FxMediaImageMagickEngine.identify(mimeType, file); } catch (FxApplicationException e1) { LOG.error(e1); } } else LOG.error(e); } } else if (mimeType.startsWith("audio")) { // audio file identification (optional) - TODO: do the same for documents // or make this really extensible final FxMetadata meta = invokeIdentify(mimeType, file, CLS_AUDIO_EXTRACTOR); if (meta != null) { return meta; } // video file identification } else if (mimeType.startsWith("video")) { // video file identification (optional) - TODO: do the same for documents // or make this really extensible final FxMetadata meta = invokeIdentify(mimeType, file, CLS_VIDEO_EXTRACTOR); if (meta != null) { return meta; } } //last resort: unknown return new FxUnknownMetadataImpl(mimeType, file.getName()); }
From source file:com.alibaba.otter.node.etl.common.io.compress.impl.PackableObject.java
/** * Compares a file to a list of packables and identifies an object by * header. If no matching header is found, it identifies the file by file * extension. If identification was not successfull, null is returned * //from w ww. j a v a 2s .co m * @param file the file to identify * @param packables a list of packables * @return a matching packable object, or null * @throws IOException */ public static PackableObject identifyByHeader(File file, List packables) throws IOException { FileInputStream fis = null; try { /* Archive result */ // PackableObject packable = null; // identify archive by header fis = new FileInputStream(file); byte[] headerBytes = new byte[20]; fis.read(headerBytes, 0, 20); Iterator iter = packables.iterator(); while (iter.hasNext()) { PackableObject p = (PackableObject) iter.next(); byte[] fieldHeader = p.getHeader(); if (fieldHeader != null) { if (compareByteArrays(headerBytes, fieldHeader)) { return p; } } } // if we couldn't find an archiver by header bytes, we'll give it a // try // with the default name extension. This is useful, cause some // archives // like tar have no header. String name = file.getName(); String extension = null; String[] s = name.split("\\."); if (s.length > 1) { extension = s[s.length - 1]; } Iterator it = packables.iterator(); while (it.hasNext()) { PackableObject p = (PackableObject) it.next(); if (p.isPackableWith(extension, PackableObject.CHOOSE_EXTENSION)) { return p; } } // No implementation found return null; } finally { IOUtils.closeQuietly(fis); } }
From source file:com.alibaba.otter.shared.common.utils.NioUtilsPerformance.java
public static void copyTest(File source, File target) throws Exception { FileInputStream fis = null; FileOutputStream fos = null;//from w w w . j a v a 2 s. co m try { fis = new FileInputStream(source); fos = new FileOutputStream(target); target.createNewFile(); byte[] bytes = new byte[16 * 1024]; int n = -1; while ((n = fis.read(bytes, 0, bytes.length)) > 0) { fos.write(bytes, 0, n); } fos.flush(); } finally { IOUtils.closeQuietly(fis); IOUtils.closeQuietly(fos); } }
From source file:gov.nih.nci.restgen.util.GeneratorUtil.java
public static void createJarArchive(File jarFile, File[] listFiles) throws IOException { byte b[] = new byte[10240]; FileOutputStream fout = new FileOutputStream(jarFile); JarOutputStream out = new JarOutputStream(fout, new Manifest()); for (int i = 0; i < listFiles.length; i++) { if (listFiles[i] == null || !listFiles[i].exists() || listFiles[i].isDirectory()) { System.out.println(); }/* ww w. ja va 2 s . co m*/ JarEntry addFiles = new JarEntry(listFiles[i].getName()); addFiles.setTime(listFiles[i].lastModified()); out.putNextEntry(addFiles); FileInputStream fin = new FileInputStream(listFiles[i]); while (true) { int len = fin.read(b, 0, b.length); if (len <= 0) break; out.write(b, 0, len); } fin.close(); } out.close(); fout.close(); }
From source file:co.cask.cdap.gateway.util.Util.java
/** * Read the contents of a binary file into a byte array. * * @param filename The name of the file/*from w w w. jav a 2s .c o m*/ * @return the content of the file if successful, otherwise null */ public static byte[] readBinaryFile(String filename) { File file = new File(filename); if (!file.isFile()) { System.err.println("'" + filename + "' is not a regular file."); return null; } int bytesToRead = (int) file.length(); byte[] bytes = new byte[bytesToRead]; int offset = 0; try { FileInputStream input = new FileInputStream(filename); while (bytesToRead > 0) { int bytesRead = input.read(bytes, offset, bytesToRead); bytesToRead -= bytesRead; offset += bytesRead; } input.close(); return bytes; } catch (FileNotFoundException e) { LOG.error("File '" + filename + "' cannot be opened: " + e.getMessage()); } catch (IOException e) { LOG.error("Error reading from file '" + filename + "': " + e.getMessage()); } return bytes; }
From source file:com.ca.dvs.app.dvs_servlet.misc.FileUtil.java
/** * A quick test to determine if uploaded file is a ZIP file * <p> //from w w w . j a v a 2s . c om * @param file the file to interrogate for being a zip file * @return true is the specified file is a zip file * @throws IOException */ public static boolean isZipFile(File file) throws IOException { boolean isZipFile = false; FileInputStream fileInputStream = null; try { fileInputStream = new FileInputStream(file); if (fileInputStream.available() > ZIP_SIGNATURE.length) { byte[] magic = new byte[ZIP_SIGNATURE.length]; if (ZIP_SIGNATURE.length == fileInputStream.read(magic, 0, ZIP_SIGNATURE.length)) { isZipFile = Arrays.equals(magic, ZIP_SIGNATURE); } } } finally { if (null != fileInputStream) { fileInputStream.close(); } } return isZipFile; }
From source file:gov.nasa.arc.geocam.geocam.HttpPost.java
protected static void assembleMultipartFiles(DataOutputStream out, Map<String, String> vars, Map<String, File> files) throws IOException { for (String key : vars.keySet()) { out.writeBytes("--" + BOUNDARY + CRLF); out.writeBytes("Content-Disposition: form-data; name=\"" + key + "\"" + CRLF); out.writeBytes(CRLF);/*from w ww.java2s . co m*/ out.writeBytes(vars.get(key) + CRLF); } for (String key : files.keySet()) { File f = files.get(key); out.writeBytes("--" + BOUNDARY + CRLF); out.writeBytes("Content-Disposition: form-data; name=\"" + key + "\"; filename=\"" + f.getName() + "\"" + CRLF); out.writeBytes("Content-Type: application/octet-stream" + CRLF); out.writeBytes(CRLF); // write file int maxBufferSize = 1024; FileInputStream fin = new FileInputStream(f); int bytesAvailable = fin.available(); int bufferSize = Math.min(maxBufferSize, bytesAvailable); byte[] buffer = new byte[bufferSize]; int bytesRead = fin.read(buffer, 0, bufferSize); while (bytesRead > 0) { out.write(buffer, 0, bufferSize); bytesAvailable = fin.available(); bufferSize = Math.min(maxBufferSize, bytesAvailable); bytesRead = fin.read(buffer, 0, bufferSize); } } out.writeBytes(CRLF); out.writeBytes("--" + BOUNDARY + "--" + CRLF); out.writeBytes(CRLF); }
From source file:Main.java
private static byte[] getBytesFromFile(File file) { ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); DataOutputStream dataOutputStream = new DataOutputStream(byteArrayOutputStream); try {// w w w. jav a 2 s .c om FileInputStream fileInputStream = null; try { fileInputStream = new FileInputStream(file); } catch (FileNotFoundException e) { e.printStackTrace(); } int maxBufferSize = 1024 * 1024; int bufferSize = (int) Math.min(file.getTotalSpace(), maxBufferSize); byte[] buffer = new byte[bufferSize]; // read file and write it into form... int bytesRead = 0; if (fileInputStream != null) { bytesRead = fileInputStream.read(buffer, 0, bufferSize); } while (bytesRead > 0) { dataOutputStream.write(buffer, 0, bufferSize); int bytesAvailable = fileInputStream.available(); bufferSize = Math.min(bytesAvailable, maxBufferSize); bytesRead = fileInputStream.read(buffer, 0, bufferSize); } } catch (Exception e) { e.printStackTrace(); } return byteArrayOutputStream.toByteArray(); }
From source file:org.webinos.android.util.ModuleUtils.java
public static boolean copyFile(File src, File dest) { boolean result = true; if (src.isDirectory()) { result = copyDir(src, dest);//from w w w. j av a 2 s . co m } else { FileInputStream fis = null; FileOutputStream fos = null; try { int count; byte[] buf = new byte[1024]; fis = new FileInputStream(src); fos = new FileOutputStream(dest); while ((count = fis.read(buf, 0, 1024)) != -1) fos.write(buf, 0, count); } catch (IOException e) { Log.v(TAG, "moveFile exception: aborting; exception: " + e + "; src = " + src.toString() + "; dest = " + dest.toString()); return false; } finally { try { if (fis != null) fis.close(); if (fos != null) fos.close(); } catch (IOException ieo) { } } } return result; }