Example usage for java.io FileInputStream read

Introduction

In this page you can find the example usage for java.io FileInputStream read.

Prototype

public int read(byte b[]) throws IOException 

Source Link

Document

Reads up to b.length bytes of data from this input stream into an array of bytes.

Usage

From source file:Main.java

public static void copyFile(File in, File out) throws IOException {
    FileInputStream fis = new FileInputStream(in);
    if (!out.exists()) {
        if (in.isDirectory()) {
            out.mkdirs();//from  w  w  w .j  ava 2 s .  c o  m
        } else {
            File parentDir = new File(out.getParent());
            if (!parentDir.exists()) {
                parentDir.mkdirs();
            }
            out.createNewFile();
        }
    }
    FileOutputStream fos = new FileOutputStream(out);
    try {
        byte[] buf = new byte[8192];
        int i = 0;
        while ((i = fis.read(buf)) != -1)
            fos.write(buf, 0, i);
    } catch (IOException e) {
        throw e;
    } finally {
        fis.close();
        fos.close();
    }
}

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From source file:Main.java

private static File getFromMediaUriPfd(Context context, ContentResolver resolver, Uri uri) {
    if (uri == null)
        return null;

    FileInputStream input = null;
    FileOutputStream output = null;
    try {// w ww.j a  v  a2 s  .  co m
        ParcelFileDescriptor pfd = resolver.openFileDescriptor(uri, "r");
        FileDescriptor fd = pfd.getFileDescriptor();
        input = new FileInputStream(fd);

        String tempFilename = getTempFilename(context);
        output = new FileOutputStream(tempFilename);

        int read;
        byte[] bytes = new byte[4096];
        while ((read = input.read(bytes)) != -1) {
            output.write(bytes, 0, read);
        }
        return new File(tempFilename);
    } catch (IOException ignored) {
        // Nothing we can do
    } finally {
        closeSilently(input);
        closeSilently(output);
    }
    return null;
}

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From source file:DiskIO.java

/**
 * Copies the contents of any disk file to the specified output file. The
 * output file will be overridden if it exist. Function reports errors.
 * /*from   w  ww .  j av  a2s .com*/
 * @param inputFile
 *            a File object
 * @param outputFile
 *            a File object
 * @throws java.io.IOException
 *             if the function could not be completed because of an IO error
 */
public static void copyFile(File inputFile, File outputFile) throws java.io.IOException {
    FileInputStream in;
    FileOutputStream out;

    byte[] buffer = new byte[512];
    int len;

    try {
        out = new FileOutputStream(outputFile);
        in = new FileInputStream(inputFile);

        while ((len = in.read(buffer)) != -1) {
            out.write(buffer, 0, len);
        }

        in.close();
        out.close();
    } catch (IOException e) {
        LOG.info("*** error during file copy " + outputFile.getAbsolutePath() + ": " + e.getMessage());
        throw e;
    }
}

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From source file:net.vexelon.bgrates.Utils.java

/**
 * Move a file stored in the cache to the internal storage of the specified context
 * @param context/*from   ww  w.ja  va2  s .c  o  m*/
 * @param cacheFile
 * @param internalStorageName
 */
public static boolean moveCacheFile(Context context, File cacheFile, String internalStorageName) {

    boolean ret = false;
    FileInputStream fis = null;
    FileOutputStream fos = null;

    try {
        fis = new FileInputStream(cacheFile);

        ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
        byte[] buffer = new byte[1024];
        int read = -1;
        while ((read = fis.read(buffer)) != -1) {
            baos.write(buffer, 0, read);
        }
        baos.close();
        fis.close();

        fos = context.openFileOutput(internalStorageName, Context.MODE_PRIVATE);
        baos.writeTo(fos);
        fos.close();

        // delete cache
        cacheFile.delete();

        ret = true;
    } catch (Exception e) {
        //Log.e(TAG, "Error saving previous rates!");
    } finally {
        try {
            if (fis != null)
                fis.close();
        } catch (IOException e) {
        }
        try {
            if (fos != null)
                fos.close();
        } catch (IOException e) {
        }
    }

    return ret;
}

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From source file:de.fu_berlin.inf.dpp.netbeans.feedback.ErrorLogManager.java

/**
 * Convenience wrapper method to upload an error log file to the server. To
 * save time and storage space, the log is compressed to a zip archive with
 * the given zipName.// ww  w  .java2 s .com
 * 
 * @param zipName
 *            a name for the zip archive, e.g. with added user ID to make it
 *            unique, zipName must be at least 3 characters long!
 * @throws IOException
 *             if an I/O error occurs
 */
private static void uploadErrorLog(String zipName, File file, IProgressMonitor monitor) throws IOException {

    if (ERROR_LOG_UPLOAD_URL == null) {
        log.warn("error log upload url is not configured, cannot upload error log file");
        return;
    }

    File archive = new File(System.getProperty("java.io.tmpdir"), zipName + ".zip");

    ZipOutputStream out = null;
    FileInputStream in = null;

    byte[] buffer = new byte[8192];

    try {

        in = new FileInputStream(file);

        out = new ZipOutputStream(new FileOutputStream(archive));

        out.putNextEntry(new ZipEntry(file.getName()));

        int read;

        while ((read = in.read(buffer)) > 0)
            out.write(buffer, 0, read);

        out.finish();
        out.close();

        FileSubmitter.uploadFile(archive, ERROR_LOG_UPLOAD_URL, monitor);
    } finally {
        IOUtils.closeQuietly(out);
        IOUtils.closeQuietly(in);
        archive.delete();
    }
}

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From source file:de.nrw.hbz.deepzoomer.fileUtil.FileUtil.java

/**
 * <p><em>Title: Loads File into an Base64 encoded Stream</em></p>
 * <p>Description: </p>/*www .  j  a  v  a2  s .  com*/
 * 
 * @param origPidfFile
 * @return 
 */
public static byte[] loadFileIntoStream(File origPidfFile) {
    FileInputStream fis = null;
    byte[] pdfStream = null;
    byte[] pdfRawStream = null;
    try {
        fis = new FileInputStream(origPidfFile);
        int i = (int) origPidfFile.length();
        byte[] b = new byte[i];
        fis.read(b);
        pdfRawStream = b;
        pdfStream = Base64.encodeBase64(pdfRawStream);
    } catch (IOException ioExc) {
        System.out.println(ioExc);
        log.error(ioExc);
    } finally {
        if (fis != null) {
            try {
                fis.close();
            } catch (IOException ioExc) {
                log.error(ioExc);
            }
        }
    }
    return pdfStream;
}

---

From source file:edu.uci.ics.asterix.event.service.AsterixEventServiceUtil.java

private static void replaceInJar(File sourceJar, String origFile, File replacementFile) throws IOException {
    String srcJarAbsPath = sourceJar.getAbsolutePath();
    String srcJarSuffix = srcJarAbsPath.substring(srcJarAbsPath.lastIndexOf(File.separator) + 1);
    String srcJarName = srcJarSuffix.split(".jar")[0];

    String destJarName = srcJarName + "-managix";
    String destJarSuffix = destJarName + ".jar";
    File destJar = new File(sourceJar.getParentFile().getAbsolutePath() + File.separator + destJarSuffix);
    //  File destJar = new File(sourceJar.getAbsolutePath() + ".modified");
    JarFile sourceJarFile = new JarFile(sourceJar);
    Enumeration<JarEntry> entries = sourceJarFile.entries();
    JarOutputStream jos = new JarOutputStream(new FileOutputStream(destJar));
    byte[] buffer = new byte[2048];
    int read;/* ww w  .j ava2 s . co  m*/
    while (entries.hasMoreElements()) {
        JarEntry entry = (JarEntry) entries.nextElement();
        String name = entry.getName();
        if (name.equals(origFile)) {
            continue;
        }
        InputStream jarIs = sourceJarFile.getInputStream(entry);
        jos.putNextEntry(entry);
        while ((read = jarIs.read(buffer)) != -1) {
            jos.write(buffer, 0, read);
        }
        jarIs.close();
    }
    sourceJarFile.close();
    JarEntry entry = new JarEntry(origFile);
    jos.putNextEntry(entry);
    FileInputStream fis = new FileInputStream(replacementFile);
    while ((read = fis.read(buffer)) != -1) {
        jos.write(buffer, 0, read);
    }
    fis.close();
    jos.close();
    sourceJar.delete();
    destJar.renameTo(sourceJar);
    destJar.setExecutable(true);
}

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From source file:com.nridge.core.base.std.FilUtl.java

/**
 * Compresses the input file into a GZIP file container.
 *
 * @param anInPathFileName The file name to be compressed.
 * @param aGzipPathFileName The file name of the ZIP container.
 *
 * @throws IOException Related to opening the file streams and
 * related read/write operations.//  www  .j av a 2s  .c  o  m
 */
public static void gzipFile(String anInPathFileName, String aGzipPathFileName) throws IOException {
    int byteCount;

    FileInputStream fileInputStream = new FileInputStream(anInPathFileName);
    FileOutputStream fileOutputStream = new FileOutputStream(aGzipPathFileName);
    GZIPOutputStream gzipOutputStream = new GZIPOutputStream(fileOutputStream);

    byte[] ioBuf = new byte[FILE_IO_BUFFER_SIZE];
    byteCount = fileInputStream.read(ioBuf);
    while (byteCount > 0) {
        gzipOutputStream.write(ioBuf, 0, byteCount);
        byteCount = fileInputStream.read(ioBuf);
    }

    gzipOutputStream.close();
    fileOutputStream.close();
    fileInputStream.close();
}

---

From source file:de.ingrid.iplug.csw.dsc.tools.FileUtils.java

/**
 * This function will copy files or directories from one location to another.
 * note that the source and the destination must be mutually exclusive. This 
 * function can not be used to copy a directory to a sub directory of itself.
 * The function will also have problems if the destination files already exist.
 * @param src -- A File object that represents the source for the copy
 * @param dest -- A File object that represnts the destination for the copy.
 * @throws IOException if unable to copy.
 * //from  w  w w  . j a  v  a2s .c om
 * Source: http://www.dreamincode.net/code/snippet1443.htm
 */
public static void copyRecursive(File src, File dest) throws IOException {
    //Check to ensure that the source is valid...
    if (!src.exists()) {
        throw new IOException("copyFiles: Can not find source: " + src.getAbsolutePath() + ".");
    } else if (!src.canRead()) { //check to ensure we have rights to the source...
        throw new IOException("copyFiles: No right to source: " + src.getAbsolutePath() + ".");
    }
    //is this a directory copy?
    if (src.isDirectory()) {
        if (!dest.exists()) { //does the destination already exist?
            //if not we need to make it exist if possible (note this is mkdirs not mkdir)
            if (!dest.mkdirs()) {
                throw new IOException("copyFiles: Could not create direcotry: " + dest.getAbsolutePath() + ".");
            }
        }
        //get a listing of files...
        String list[] = src.list();
        //copy all the files in the list.
        for (int i = 0; i < list.length; i++) {
            File dest1 = new File(dest, list[i]);
            File src1 = new File(src, list[i]);
            copyRecursive(src1, dest1);
        }
    } else {
        //This was not a directory, so lets just copy the file
        FileInputStream fin = null;
        FileOutputStream fout = null;
        byte[] buffer = new byte[4096]; //Buffer 4K at a time (you can change this).
        int bytesRead;
        try {
            //open the files for input and output
            fin = new FileInputStream(src);
            fout = new FileOutputStream(dest);
            //while bytesRead indicates a successful read, lets write...
            while ((bytesRead = fin.read(buffer)) >= 0) {
                fout.write(buffer, 0, bytesRead);
            }
            fin.close();
            fout.close();
            fin = null;
            fout = null;
        } catch (IOException e) { //Error copying file... 
            IOException wrapper = new IOException("copyFiles: Unable to copy file: " + src.getAbsolutePath()
                    + "to" + dest.getAbsolutePath() + ".");
            wrapper.initCause(e);
            wrapper.setStackTrace(e.getStackTrace());
            throw wrapper;
        } finally { //Ensure that the files are closed (if they were open).
            if (fin != null) {
                fin.close();
            }
            if (fout != null) {
                fin.close();
            }
        }
    }
}

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From source file:com.baidu.rigel.biplatform.ma.file.serv.util.LocalFileOperationUtils.java

/**
 * ???//  w ww .  jav a  2s  .c o m
 * 
 * @param oldFile
 *            
 * @param newFile
 *            
 * @return
 * @throws IOException
 */
private static boolean copy(File oldFile, File newFile) {
    FileInputStream fileInputStream = null;
    FileOutputStream fileOutputStream = null;
    try {
        fileInputStream = new FileInputStream(oldFile);
        fileOutputStream = new FileOutputStream(newFile);
        byte[] buf = new byte[1024];
        int len = 0;
        // ??
        while ((len = fileInputStream.read(buf)) != -1) {
            fileOutputStream.write(buf, 0, len);
            fileOutputStream.flush();
        }
        return true;
    } catch (IOException e) {
        LOG.error(e.getMessage(), e);
        return false;
    } finally {
        try {
            if (fileInputStream != null) {
                fileInputStream.close();
            }
            if (fileOutputStream != null) {
                fileOutputStream.close();
            }
        } catch (IOException e) {
            LOG.error(e.getMessage(), e);
        }
    }
}

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