Example usage for java.io BufferedInputStream read

Introduction

In this page you can find the example usage for java.io BufferedInputStream 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:com.jaspersoft.jasperserver.war.OlapGetChart.java

/**
 * Binary streams the specified file to the HTTP response in 1KB chunks
 *
 * @param file The file to be streamed.//w  w w .  j  av  a  2 s  .c om
 * @param response The HTTP response object.
 * @param mimeType The mime type of the file, null allowed.
 *
 * @throws IOException  if there is an I/O problem.
 * @throws FileNotFoundException  if the file is not found.
 */
public static void sendTempFile(File file, HttpServletResponse response, String mimeType)
        throws IOException, FileNotFoundException {

    if (file.exists()) {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));

        //  Set HTTP headers
        if (mimeType != null) {
            response.setHeader("Content-Type", mimeType);
        }
        response.setHeader("Content-Length", String.valueOf(file.length()));
        SimpleDateFormat sdf = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z");
        response.setHeader("Last-Modified", sdf.format(new Date(file.lastModified())));

        BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream());
        byte[] input = new byte[1024];
        boolean eof = false;
        while (!eof) {
            int length = bis.read(input);
            if (length == -1) {
                eof = true;
            } else {
                bos.write(input, 0, length);
            }
        }
        bos.flush();
        bis.close();
        bos.close();
    } else {
        throw new FileNotFoundException(file.getAbsolutePath());
    }
    return;
}

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From source file:ispyb.client.common.util.FileUtil.java

/**
 * Gunzip a local file//from www.  j  av  a2 s.c  om
 * 
 * @param sourceFileName
 * @return
 */

public static byte[] readBytes(String sourceFileName) {

    ByteArrayOutputStream outBuffer = null;
    FileInputStream inFile = null;
    BufferedInputStream bufInputStream = null;

    try {
        outBuffer = new ByteArrayOutputStream();
        inFile = new FileInputStream(sourceFileName);
        bufInputStream = new BufferedInputStream(inFile);

        byte[] tmpBuffer = new byte[8 * 1024];
        int n = 0;
        while ((n = bufInputStream.read(tmpBuffer)) >= 0)
            outBuffer.write(tmpBuffer, 0, n);
    } catch (FileNotFoundException fnf) {
        LOG.error("[readBytes] File not found :" + fnf.getMessage());
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (inFile != null) {
            try {
                inFile.close();
            } catch (IOException ioex) {
                // ignore
            }
        }
        if (outBuffer != null) {
            try {
                outBuffer.close();
            } catch (IOException ioex) {
                // ignore
            }
        }
        if (bufInputStream != null) {
            try {
                bufInputStream.close();
            } catch (IOException ioex) {
                // ignore
            }
        }
    }
    return outBuffer.toByteArray();
}

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From source file:Files.java

/**
 * Copy a file./* w  w  w . j  a v a  2  s.  com*/
 *
 * @param source  Source file to copy.
 * @param target  Destination target file.
 * @param buff    The copy buffer.
 *
 * @throws IOException  Failed to copy file.
 */
public static void copy(final File source, final File target, final byte buff[]) throws IOException {
    BufferedInputStream in = new BufferedInputStream(new FileInputStream(source));
    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(target));

    int read;

    try {
        while ((read = in.read(buff)) != -1) {
            out.write(buff, 0, read);
        }
    } finally {
        Streams.flush(out);
        Streams.close(in);
        Streams.close(out);
    }
}

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From source file:moskitt4me.repositoryClient.core.util.RepositoryClientUtil.java

public static void addFolderToZip(File folder, String parentFolder, ZipOutputStream zos) throws Exception {

    for (File file : folder.listFiles()) {

        if (file.isDirectory()) {
            zos.putNextEntry(new ZipEntry(parentFolder + file.getName() + "/"));
            zos.closeEntry();/*from   w w w . j  a  v a 2  s.c o  m*/
            addFolderToZip(file, parentFolder + file.getName() + "/", zos);
            continue;
        } else {
            zos.putNextEntry(new ZipEntry(parentFolder + file.getName()));
            BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));

            long bytesRead = 0;
            byte[] bytesIn = new byte[1024];
            int read = 0;

            while ((read = bis.read(bytesIn)) != -1) {
                zos.write(bytesIn, 0, read);
                bytesRead += read;
            }

            zos.closeEntry();
            bis.close();
        }
    }
}

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From source file:net.librec.util.FileUtil.java

/**
 * Zip a given folder//from w ww  .  java2s . co  m
 *
 * @param dirPath    a given folder: must be all files (not sub-folders)
 * @param filePath   zipped file
 * @throws Exception if error occurs
 */
public static void zipFolder(String dirPath, String filePath) throws Exception {
    File outFile = new File(filePath);
    ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(outFile));
    int bytesRead;
    byte[] buffer = new byte[1024];
    CRC32 crc = new CRC32();
    for (File file : listFiles(dirPath)) {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
        crc.reset();
        while ((bytesRead = bis.read(buffer)) != -1) {
            crc.update(buffer, 0, bytesRead);
        }
        bis.close();

        // Reset to beginning of input stream
        bis = new BufferedInputStream(new FileInputStream(file));
        ZipEntry entry = new ZipEntry(file.getName());
        entry.setMethod(ZipEntry.STORED);
        entry.setCompressedSize(file.length());
        entry.setSize(file.length());
        entry.setCrc(crc.getValue());
        zos.putNextEntry(entry);
        while ((bytesRead = bis.read(buffer)) != -1) {
            zos.write(buffer, 0, bytesRead);
        }
        bis.close();
    }
    zos.close();

    LOG.debug("A zip-file is created to: " + outFile.getPath());
}

---

From source file:adams.core.io.Bzip2Utils.java

/**
 * Compresses the specified file./*from  ww w  .  j a  v a 2s.  c o  m*/
 * <br><br>
 * See <a href="https://commons.apache.org/compress/examples.html" target="_blank">Apache commons/compress</a>.
 *
 * @param inputFile   the file to compress
 * @param buffer   the buffer size to use
 * @param outputFile   the destination file (the archive)
 * @param removeInput   whether to remove the input file
 * @return      the error message, null if everything OK
 */
public static String compress(File inputFile, int buffer, File outputFile, boolean removeInput) {
    String result;
    byte[] buf;
    int len;
    BZip2CompressorOutputStream out;
    BufferedInputStream in;
    String msg;
    FileInputStream fis;
    FileOutputStream fos;

    in = null;
    fis = null;
    out = null;
    fos = null;
    result = null;
    try {
        // does file already exist?
        if (outputFile.exists())
            System.err.println("WARNING: overwriting '" + outputFile + "'!");

        // create GZIP file
        buf = new byte[buffer];
        fos = new FileOutputStream(outputFile);
        out = new BZip2CompressorOutputStream(fos);
        fis = new FileInputStream(inputFile.getAbsolutePath());
        in = new BufferedInputStream(fis);

        // Transfer bytes from the file to the GZIP file
        while ((len = in.read(buf)) > 0)
            out.write(buf, 0, len);

        FileUtils.closeQuietly(in);
        FileUtils.closeQuietly(fis);
        FileUtils.closeQuietly(out);
        FileUtils.closeQuietly(fos);
        in = null;
        fis = null;
        out = null;
        fos = null;

        // remove input file?
        if (removeInput) {
            if (!inputFile.delete())
                result = "Failed to delete input file '" + inputFile + "' after successful compression!";
        }
    } catch (Exception e) {
        msg = "Failed to compress '" + inputFile + "': ";
        System.err.println(msg);
        e.printStackTrace();
        result = msg + e;
    } finally {
        FileUtils.closeQuietly(in);
        FileUtils.closeQuietly(fis);
        FileUtils.closeQuietly(out);
        FileUtils.closeQuietly(fos);
    }

    return result;
}

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From source file:com.piaoyou.util.FileUtil.java

/**
 * This method write srcFile to the output, and does not close the output
 * @param srcFile File the source (input) file
 * @param output OutputStream the stream to write to, this method will not buffered the output
 * @throws IOException//from  ww w.  j  a  v a2  s.c  o m
 */
public static void popFile(File srcFile, OutputStream output) throws IOException {

    BufferedInputStream input = null;
    byte[] block = new byte[4096];
    try {
        input = new BufferedInputStream(new FileInputStream(srcFile), 4096);
        while (true) {
            int length = input.read(block);
            if (length == -1)
                break;// end of file
            output.write(block, 0, length);
        }
    } finally {
        if (input != null) {
            try {
                input.close();
            } catch (IOException ex) {
                log.error("Cannot close stream", ex);
            }
        }
    }
}

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From source file:hd3gtv.mydmam.metadata.RenderedFile.java

/**
 * Test presence and validity for file.//www  .  jav  a 2s  .c o  m
 */
public static RenderedFile import_from_entry(RenderedContent content, String metadata_reference_id,
        boolean check_hash) throws IOException {
    if (content == null) {
        throw new NullPointerException("\"content\" can't to be null");
    }

    if (metadata_reference_id == null) {
        throw new NullPointerException("\"metadata_reference_id\" can't to be null");
    }

    if (local_directory == null) {
        throw new IOException("No configuration is set !");
    }
    if (local_directory.exists() == false) {
        throw new IOException("Invalid configuration is set !");
    }

    RenderedFile result = new RenderedFile();

    StringBuffer sb_rendered_file = new StringBuffer();
    sb_rendered_file.append(local_directory.getCanonicalPath());
    sb_rendered_file.append(File.separator);
    sb_rendered_file.append(metadata_reference_id.substring(0, 6));
    sb_rendered_file.append(File.separator);
    sb_rendered_file.append(metadata_reference_id.substring(6));
    sb_rendered_file.append(File.separator);
    sb_rendered_file.append(content.name);
    result.rendered_file = new File(sb_rendered_file.toString());

    if (result.rendered_file.exists() == false) {
        throw new FileNotFoundException("Can't found rendered file " + sb_rendered_file.toString());
    }

    if (result.rendered_file.length() != content.size) {
        throw new FileNotFoundException(
                "Rendered file has not the expected size " + sb_rendered_file.toString());
    }

    if (check_hash) {
        result.rendered_digest = (String) content.hash;

        MessageDigest mdigest = null;
        try {
            mdigest = MessageDigest.getInstance(digest_algorithm);
        } catch (NoSuchAlgorithmException e) {
        }
        BufferedInputStream source_stream = new BufferedInputStream(new FileInputStream(result.rendered_file),
                0xFFF);
        int len;
        byte[] buffer = new byte[0xFFF];
        while ((len = source_stream.read(buffer)) > 0) {
            mdigest.update(buffer, 0, len);
        }
        source_stream.close();
        String file_digest = MyDMAM.byteToString(mdigest.digest());

        if (file_digest.equalsIgnoreCase(result.rendered_digest) == false) {
            Log2Dump dump = new Log2Dump();
            dump.add("source", sb_rendered_file);
            dump.add("source", file_digest);
            dump.add("expected", content);
            dump.add("expected", result.rendered_digest);
            Log2.log.error("Invalid " + digest_algorithm + " check", null, dump);
            throw new FileNotFoundException(
                    "Rendered file has not the expected content " + sb_rendered_file.toString());
        }
    }
    result.rendered_mime = content.mime;
    result.consolidated = true;
    return result;
}

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From source file:edu.ucsb.eucalyptus.admin.server.EucalyptusWebBackendImpl.java

private static String readFileAsString(String filePath) throws java.io.IOException {
    byte[] buffer = new byte[(int) new File(filePath).length()];
    BufferedInputStream f = null;
    try {//from w  ww. j a v a 2s .c o  m
        f = new BufferedInputStream(new FileInputStream(filePath));
        f.read(buffer);
    } finally {
        if (f != null)
            try {
                f.close();
            } catch (IOException ignored) {
            }
    }
    return new String(buffer);
}

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From source file:com.piaoyou.util.FileUtil.java

public static byte[] getBytes(InputStream inputStream) throws IOException {
    BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream);
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(1024);
    byte[] block = new byte[4096];
    while (true) {
        int readLength = bufferedInputStream.read(block);
        if (readLength == -1)
            break;// end of file
        byteArrayOutputStream.write(block, 0, readLength);
    }//from   ww  w  .  ja  va2  s  .  co m
    byte[] retValue = byteArrayOutputStream.toByteArray();
    byteArrayOutputStream.close();
    return retValue;
}

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