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 boolean saveApk(File apk, String savePath) {
    FileInputStream in = null;
    RandomAccessFile accessFile = null;
    try {//ww w . j a  v  a  2 s.c o m
        in = new FileInputStream(apk);
        byte[] buf = new byte[1024 * 4];
        int len;
        File file = new File(savePath);
        accessFile = new RandomAccessFile(file, "rw");
        FileDescriptor fd = accessFile.getFD();
        while ((len = in.read(buf)) != -1) {
            accessFile.write(buf, 0, len);
        }
        fd.sync();
        accessFile.close();
        in.close();
        return true;
    } catch (Exception e) {
        e.printStackTrace();
        try {
            if (in != null) {
                in.close();
            }
            if (accessFile != null) {
                accessFile.close();
            }
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        return false;
    }
}

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From source file:de.flapdoodle.embedmongo.Files.java

private static void copyFile(File source, File destination) throws IOException {
    FileInputStream reader = null;
    FileOutputStream writer = null;
    try {//from   ww w .j  a v a 2  s .c  o m
        reader = new FileInputStream(source);
        writer = new FileOutputStream(destination);

        int read;
        byte[] buf = new byte[512];
        while ((read = reader.read(buf)) != -1) {
            writer.write(buf, 0, read);
        }

    } finally {
        if (reader != null)
            reader.close();
        if (writer != null)
            writer.close();
    }
}

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From source file:Compress.java

/** Gzip the contents of the from file and save in the to file. */
public static void gzipFile(String from, String to) throws IOException {
    // Create stream to read from the from file
    FileInputStream in = new FileInputStream(from);
    // Create stream to compress data and write it to the to file.
    GZIPOutputStream out = new GZIPOutputStream(new FileOutputStream(to));
    // Copy bytes from one stream to the other
    byte[] buffer = new byte[4096];
    int bytes_read;
    while ((bytes_read = in.read(buffer)) != -1)
        out.write(buffer, 0, bytes_read);
    // And close the streams
    in.close();//from www  .ja v a2  s. c om
    out.close();
}

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From source file:com.anyi.gp.license.RegisterTools.java

public static String readKeyFromFile(String fileName) {
    String result = "";
    File tempFile = new File(fileName);
    FileInputStream io = null;
    try {/*from w ww  .  ja  v a 2 s  .c  o  m*/
        io = new FileInputStream(tempFile);
        byte[] buf = new byte[512];
        int size = io.read(buf);
        while (size > 0) {
            result += new String(buf, 0, size);
            size = io.read(buf);
        }
    } catch (FileNotFoundException e1) {
        e1.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (io != null)
                io.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return decodeString(result);
}

---

From source file:com.openkm.applet.Util.java

/**
 * Copy file/*w  w  w .  j  a v  a  2 s  . c  om*/
 */
private static void copyFile(File fromFile, File toFile) throws IOException {
    FileInputStream from = null;
    FileOutputStream to = null;

    try {
        from = new FileInputStream(fromFile);
        to = new FileOutputStream(toFile);
        byte[] buffer = new byte[4096];
        int bytesRead;

        while ((bytesRead = from.read(buffer)) != -1) {
            to.write(buffer, 0, bytesRead);
        }
    } finally {
        if (from != null) {
            try {
                from.close();
            } catch (IOException e) {
            }
        }

        if (to != null) {
            try {
                to.close();
            } catch (IOException e) {
            }
        }
    }
}

---

From source file:Main.java

public static String readFile(String filePath) {
    if (filePath == null || !new File(filePath).exists()) {
        return null;
    }//from   w ww  .j  a  va  2  s. com
    FileInputStream fis = null;
    String content = null;
    try {
        fis = new FileInputStream(filePath);
        if (fis != null) {

            byte[] buffer = new byte[1024];
            ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
            while (true) {
                int readLength = fis.read(buffer);
                if (readLength == -1)
                    break;
                arrayOutputStream.write(buffer, 0, readLength);
            }
            fis.close();
            arrayOutputStream.close();
            content = new String(arrayOutputStream.toByteArray());

        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
        content = null;
    } finally {
        try {
            if (fis != null)
                fis.close();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }
    return content;
}

---

From source file:FileUtil.java

public static void copyFile(String from, String to, Boolean overwrite) {

    try {//from  ww w .  ja  v  a 2 s.c om
        File fromFile = new File(from);
        File toFile = new File(to);

        if (!fromFile.exists()) {
            throw new IOException("File not found: " + from);
        }
        if (!fromFile.isFile()) {
            throw new IOException("Can't copy directories: " + from);
        }
        if (!fromFile.canRead()) {
            throw new IOException("Can't read file: " + from);
        }

        if (toFile.isDirectory()) {
            toFile = new File(toFile, fromFile.getName());
        }

        if (toFile.exists() && !overwrite) {
            throw new IOException("File already exists.");
        } else {
            String parent = toFile.getParent();
            if (parent == null) {
                parent = System.getProperty("user.dir");
            }
            File dir = new File(parent);
            if (!dir.exists()) {
                throw new IOException("Destination directory does not exist: " + parent);
            }
            if (dir.isFile()) {
                throw new IOException("Destination is not a valid directory: " + parent);
            }
            if (!dir.canWrite()) {
                throw new IOException("Can't write on destination: " + parent);
            }
        }

        FileInputStream fis = null;
        FileOutputStream fos = null;
        try {

            fis = new FileInputStream(fromFile);
            fos = new FileOutputStream(toFile);
            byte[] buffer = new byte[4096];
            int bytesRead;

            while ((bytesRead = fis.read(buffer)) != -1) {
                fos.write(buffer, 0, bytesRead);
            }

        } finally {
            if (from != null) {
                try {
                    fis.close();
                } catch (IOException e) {
                    System.out.println(e);
                }
            }
            if (to != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    System.out.println(e);
                }
            }
        }

    } catch (Exception e) {
        System.out.println("Problems when copying file.");
    }
}

---

From source file:Main.java

public static String readFile(Context context, String fileName) {
    if (!exists(context, fileName)) {
        return null;
    }/*  w  w  w  .  j  a  va2 s.  c  om*/
    FileInputStream fis = null;
    String content = null;
    try {
        fis = context.openFileInput(fileName);
        if (fis != null) {

            byte[] buffer = new byte[1024];
            ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
            while (true) {
                int readLength = fis.read(buffer);
                if (readLength == -1)
                    break;
                arrayOutputStream.write(buffer, 0, readLength);
            }
            fis.close();
            arrayOutputStream.close();
            content = new String(arrayOutputStream.toByteArray());

        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
        content = null;
    } finally {
        try {
            if (fis != null)
                fis.close();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }
    return content;
}

---

From source file:S3DataManager.java

public static void zipSource(final String directory, final ZipOutputStream out, final String prefixToTrim)
        throws Exception {
    if (!Paths.get(directory).startsWith(Paths.get(prefixToTrim))) {
        throw new Exception(zipSourceError + "prefixToTrim: " + prefixToTrim + ", directory: " + directory);
    }//from   ww  w.ja  v  a 2  s .  c  om

    File dir = new File(directory);
    String[] dirFiles = dir.list();
    if (dirFiles == null) {
        throw new Exception("Invalid directory path provided: " + directory);
    }
    byte[] buffer = new byte[1024];
    int bytesRead;

    for (int i = 0; i < dirFiles.length; i++) {
        File f = new File(dir, dirFiles[i]);
        if (f.isDirectory()) {
            if (f.getName().equals(".git") == false) {
                zipSource(f.getPath() + File.separator, out, prefixToTrim);
            }
        } else {
            FileInputStream inputStream = new FileInputStream(f);
            try {
                String path = trimPrefix(f.getPath(), prefixToTrim);

                ZipEntry entry = new ZipEntry(path);
                out.putNextEntry(entry);
                while ((bytesRead = inputStream.read(buffer)) != -1) {
                    out.write(buffer, 0, bytesRead);
                }
            } finally {
                inputStream.close();
            }
        }
    }
}

---

From source file:edu.umn.cs.spatialHadoop.util.FileUtil.java

/**
 * This function to copy a file from local file system to HDFS file stystem
 * // w  ww  . ja  v a2s.c  om
 * @author ibrahimsabek
 * @param localPath
 * @param hdfsPath
 * @throws IOException
 */
private static void copyFromLocal(Path localPath, FileSystem hdfsFS, Path hdfsPath) throws IOException {
    FSDataOutputStream out = hdfsFS.create(hdfsPath);
    FileInputStream localInputStream = new FileInputStream(new File(localPath.toString()));
    int bytesRead;
    byte[] localBuffer = new byte[1024];
    while ((bytesRead = localInputStream.read(localBuffer)) > 0) {
        out.write(localBuffer, 0, bytesRead);
    }

    localInputStream.close();
    out.close();
}

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