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[], int off, int len) throws IOException 

Source Link

Document

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

Usage

From source file:com.clustercontrol.jobmanagement.util.JobmapIconImageUtil.java

/**
 * ?/*from ww w .  j  a v a  2  s  .com*/
 * @param filepath 
 * @throws Exception
 */
private static byte[] getFileData(String filepath) throws Exception {
    File file = new File(filepath);
    String filename = file.getName();
    int filesize = (int) file.length();
    if (filesize > MAX_FILESIZE) {
        m_log.warn("getFileData(), file size is too large");
        throw new Exception(Messages.getString("message.job.143"));
    }
    byte[] filedata = null;

    /*
     * 
     */
    FileInputStream stream = null;
    try {
        stream = new FileInputStream(filepath);
        filedata = new byte[filesize];
        int readsize = stream.read(filedata, 0, filesize);
        m_log.debug("UploadImage readsize = " + readsize + ", filesize = " + filesize);
        m_log.debug("path=" + filepath + ", name=" + filename);
    } catch (FileNotFoundException e) {
        m_log.warn("getFileData(), " + e.getMessage(), e);
        throw new Exception(Messages.getString("file.not.found"), e);
    } catch (Exception e) {
        m_log.warn("getFileData(), " + e.getMessage(), e);
        throw e;
    } finally {
        if (stream != null) {
            try {
                stream.close();
            } catch (IOException e) {
                m_log.warn("getFileData(), " + e.getMessage(), e);
            }
            stream = null;
        }
    }
    return filedata;
}

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From source file:Main.java

public static void copyFile(File src, File dest) {
    if (null == src || null == dest) {
        return;//from   www  . j  av a2  s.c o  m
    }

    FileInputStream in = null;
    FileOutputStream out = null;
    try {
        in = new FileInputStream(src);
        out = new FileOutputStream(dest);
        int byteCount = 8096;
        byte[] buffer = new byte[byteCount];
        int count = 0;
        while ((count = in.read(buffer, 0, byteCount)) != -1) {
            out.write(buffer, 0, count);
        }
        out.flush();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            in.close();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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From source file:CompressTransfer.java

public static void transfer(FileInputStream srcIs, FileOutputStream destOut) throws IOException {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    BZip2CompressorOutputStream gos = new BZip2CompressorOutputStream(destOut);
    int count;/*from  www.  java2s  . c  o m*/
    byte data[] = new byte[BUFFER];
    while ((count = srcIs.read(data, 0, BUFFER)) != -1) {
        //out.write(data, 0, count);
        gos.write(data, 0, count);
    }
    gos.flush();
    gos.close();
}

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From source file:Main.java

public static boolean copyFile(String quelle, String ziel) {
    if ((new File(quelle)).equals(new File(ziel))) {
        return false; // Quelle und Ziel sind dieselbe Datei!
    }//ww w. ja  v  a2 s.c o  m
    final int BUFSIZE = 4096;
    FileInputStream f1;
    FileOutputStream f2;
    byte[] buf = new byte[BUFSIZE];
    int n;
    if (!canOpenFile(quelle)) {
        return false;
    }
    try {
        f1 = new FileInputStream(quelle);
        f2 = new FileOutputStream(ziel);
        while ((n = f1.read(buf, 0, BUFSIZE)) > 0) {
            f2.write(buf, 0, n);
        }
        f1.close();
        f2.close();
    } catch (IOException e) {
        return false;
    }
    return true;
}

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From source file:Main.java

public static void toTargz(String srcFile, String targetFile) throws IOException {
    File sourceFile = new File(srcFile);
    File target = new File(targetFile);
    FileInputStream in = null;
    GZIPOutputStream gout = null;
    try {/*  w ww.  ja  v a2 s .  c o m*/
        in = new FileInputStream(sourceFile);
        gout = new GZIPOutputStream(new FileOutputStream(target));
        byte[] array = new byte[BUFFER_LEN];
        int number = -1;
        while ((number = in.read(array, 0, array.length)) != -1) {
            gout.write(array, 0, number);
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (gout != null) {
            try {
                gout.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

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From source file:ai.h2o.servicebuilder.Util.java

/**
 * Create jar archive out of files list. Names in archive have paths starting from relativeToDir
 *
 * @param tobeJared     list of files/* w w w  . j a  v  a  2  s.c o  m*/
 * @param relativeToDir starting directory for paths
 * @return jar as byte array
 * @throws IOException
 */
public static byte[] createJarArchiveByteArray(File[] tobeJared, String relativeToDir) throws IOException {
    int BUFFER_SIZE = 10240;
    byte buffer[] = new byte[BUFFER_SIZE];
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    JarOutputStream out = new JarOutputStream(stream, new Manifest());

    for (File t : tobeJared) {
        if (t == null || !t.exists() || t.isDirectory()) {
            if (t != null && !t.isDirectory())
                logger.error("Can't add to jar {}", t);
            continue;
        }
        // Create jar entry
        String filename = t.getPath().replace(relativeToDir, "").replace("\\", "/");
        //      if (filename.endsWith("MANIFEST.MF")) { // skip to avoid duplicates
        //        continue;
        //      }
        JarEntry jarAdd = new JarEntry(filename);
        jarAdd.setTime(t.lastModified());
        out.putNextEntry(jarAdd);

        // Write file to archive
        FileInputStream in = new FileInputStream(t);
        while (true) {
            int nRead = in.read(buffer, 0, buffer.length);
            if (nRead <= 0)
                break;
            out.write(buffer, 0, nRead);
        }
        in.close();
    }

    out.close();
    stream.close();
    return stream.toByteArray();
}

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From source file:org.meshpoint.anode.util.ModuleUtils.java

public static boolean copyFile(File src, File dest) {
    boolean result = true;
    if (src.isDirectory()) {
        result = copyDir(src, dest);//ww w  .  j  av  a  2  s .c o  m
    } else {
        try {
            int count;
            byte[] buf = new byte[1024];
            FileInputStream fis = new FileInputStream(src);
            FileOutputStream 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;
        }
    }
    return result;
}

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From source file:de.xwic.appkit.core.util.ZipUtil.java

/**
 * Zips the files array into a file that has the name given as parameter.
 * /*  w ww  .  ja va2  s .  c o  m*/
 * @param files
 *            the files array
 * @param zipFileName
 *            the name for the zip file
 * @return the new zipped file
 * @throws IOException
 */
public static File zip(File[] files, String zipFileName) throws IOException {

    FileOutputStream stream = null;
    ZipOutputStream out = null;
    File archiveFile = null;

    try {

        if (!zipFileName.endsWith(".zip")) {
            zipFileName = zipFileName + ".zip";
        }

        archiveFile = new File(zipFileName);
        byte buffer[] = new byte[BUFFER_SIZE];

        // Open archive file
        stream = new FileOutputStream(archiveFile);
        out = new ZipOutputStream(stream);

        for (int i = 0; i < files.length; i++) {

            if (null == files[i] || !files[i].exists() || files[i].isDirectory()) {
                continue;
            }

            log.info("Zipping " + files[i].getName());

            // Add archive entry
            ZipEntry zipAdd = new ZipEntry(files[i].getName());
            zipAdd.setTime(files[i].lastModified());
            out.putNextEntry(zipAdd);

            // Read input & write to output
            FileInputStream in = new FileInputStream(files[i]);
            while (true) {

                int nRead = in.read(buffer, 0, buffer.length);

                if (nRead <= 0) {
                    break;
                }

                out.write(buffer, 0, nRead);
            }

            in.close();
        }

    } catch (IOException e) {

        log.error("Error: " + e.getMessage(), e);
        throw e;

    } finally {

        try {

            if (null != out) {
                out.close();
            }

            if (null != stream) {
                stream.close();
            }
        } catch (IOException e) {
            log.error("Error: " + e.getMessage(), e);
            throw e;
        }

    }

    return archiveFile;

}

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From source file:com.feilong.controller.DownloadController.java

/**
 * ???/*from ww  w  . java  2s . co  m*/
 * 
 * @param filePath
 *            
 * @return ?
 */
public static String getFileHeader(String filePath) {
    FileInputStream is = null;
    String value = null;
    try {
        is = new FileInputStream(filePath);
        byte[] b = new byte[4];
        is.read(b, 0, b.length);
        value = bytesToHexString(b);
    } catch (Exception e) {
    } finally {
        if (null != is) {
            try {
                is.close();
            } catch (IOException e) {
            }
        }
    }
    return value;
}

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From source file:Main.java

static String readStringFromFile(File theFile) {
    String myReturnString;/*  w w  w.  j a va  2  s .c  o  m*/
    if (theFile == null) {
        myReturnString = "No File was opened";
    } else {
        try {
            FileInputStream in = new FileInputStream(theFile);
            int size = (int) theFile.length();
            byte[] data = new byte[size];
            /* let's read in the file (which may not all arrive in one chomp...)*/;
            int bytes_read = 0;
            while (bytes_read < size) {
                bytes_read += in.read(data, bytes_read, size - bytes_read);
            }
            ;
            myReturnString = new String(data); // used to be new String( data, 0 );
        } catch (Exception exc) {
            myReturnString = "Error opening file:" + exc;
        }
        ;
    }
    ;
    return myReturnString;
}

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