Example usage for java.nio.channels FileChannel transferFrom

List of usage examples for java.nio.channels FileChannel transferFrom

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Introduction

In this page you can find the example usage for java.nio.channels FileChannel transferFrom.

Prototype

public abstract long transferFrom(ReadableByteChannel src, long position, long count) throws IOException;

Source Link

Document

Transfers bytes into this channel's file from the given readable byte channel.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    FileChannel srcChannel = new FileInputStream("srcFilename").getChannel();
    FileChannel dstChannel = new FileOutputStream("dstFilename").getChannel();

    dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
    srcChannel.close();/*ww w .  j av a2 s .  co  m*/
    dstChannel.close();
}

From source file:Copy.java

public static void main(String[] args) {
    FileChannel in = null;/*from w  w  w  .  j ava2  s . com*/
    FileChannel out = null;

    if (args.length < 2) {
        System.out.println("Usage: java Copy <from> <to>");
        System.exit(1);
    }

    try {
        in = new FileInputStream(args[0]).getChannel();
        out = new FileOutputStream(args[1]).getChannel();
        out.transferFrom(in, 0L, (int) in.size());

    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static boolean importDatabase(String dbName) {

    try {//from  www  . j ava2s . c o  m
        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//" + PACKAGENAME + "//databases//" + dbName;
            String backupDBPath = "/AttendanceManager/" + dbName;
            File backupDB = new File(data, currentDBPath);
            File currentDB = new File(sd, backupDBPath);

            FileChannel src = new FileInputStream(currentDB).getChannel();
            FileChannel dst = new FileOutputStream(backupDB).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();
        }
    } catch (Exception e) {
        return false;
    }
    return true;
}

From source file:Main.java

public static void saveDBInSdcard(Context pContext, String pDatabaseName) {
    try {/* w w  w.  ja  v a 2  s  .c  om*/
        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//" + pContext.getPackageName() + "//databases//" + pDatabaseName;
            String backupDBPath = pDatabaseName;
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, backupDBPath);

            FileChannel src = new FileInputStream(currentDB).getChannel();
            FileChannel dst = new FileOutputStream(backupDB).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();
            Toast.makeText(pContext, backupDB.toString(), Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        Toast.makeText(pContext, e.toString(), Toast.LENGTH_LONG).show();
    }
}

From source file:Main.java

/**
 * Create a backup of the database.// w  w w .ja va2s . c om
 *
 * @param context who calls the function.
 * @param dbName  Name of the database to backup. (If empty, radiomap.db is used).
 */
public static void exportDb(Context context, String dbName) {
    try {
        if (dbName.equals(""))
            dbName = "radiomap.db";

        File sd = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//" + context.getApplicationContext().getPackageName()
                    + "//databases//" + dbName;
            File currentDB = new File(data, currentDBPath);
            File backupDB = new File(sd, dbName);

            FileChannel src = new FileInputStream(currentDB).getChannel();
            FileChannel dst = new FileOutputStream(backupDB).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();

            Toast.makeText(context, "Datenbank nach Downloads exportiert!", Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        Log.e("Utils", e.getMessage());
        Toast.makeText(context, "Exportieren fehlgeschlagen!", Toast.LENGTH_LONG).show();
    }
}

From source file:Main.java

/**
 * Create a backup of the database.//from w w w.ja v a 2s  . c  o m
 *
 * @param context who calls the function.
 * @param dbName  Name of the database to backup. (If empty, radiomap.db is used).
 */
public static void importDb(Context context, String dbName) {
    try {
        if (dbName.equals(""))
            dbName = "radiomap.db";

        File sd = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            String currentDBPath = "//data//" + context.getApplicationContext().getPackageName()
                    + "//databases//" + dbName;
            File backupDB = new File(data, currentDBPath);
            File currentDB = new File(sd, dbName);

            FileChannel src = new FileInputStream(currentDB).getChannel();
            FileChannel dst = new FileOutputStream(backupDB).getChannel();
            dst.transferFrom(src, 0, src.size());
            src.close();
            dst.close();

            Toast.makeText(context, "Datenbank von Downloads importiert!", Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        Log.e("Utils", e.getMessage());
        Toast.makeText(context, "Import fehlgeschlagen!", Toast.LENGTH_LONG).show();
    }
}

From source file:Main.java

public static void restoreDb(File currentDB, String restoreDBFileName) {
    try {//from  www .j a v a 2 s .co  m
        backupDb(currentDB);
        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            File f = new File(sd.getAbsolutePath() + "/AccountManagement");
            if (!f.exists()) {
                f.mkdir();
            }
            String restoreDBPath = "AccountManagement/" + restoreDBFileName;
            File restoreDB = new File(sd, restoreDBPath);

            if (currentDB.exists()) {
                FileChannel src = new FileInputStream(restoreDB).getChannel();
                FileChannel dst = new FileOutputStream(currentDB).getChannel();
                dst.transferFrom(src, 0, src.size());
                src.close();
                dst.close();
            }
        }
    } catch (Exception e) {
        System.out.println(e);
    }
}

From source file:Main.java

public static void backupDb(File currentDB) {
    try {// w w w.  j  a  v  a 2s .  c o m

        File sd = Environment.getExternalStorageDirectory();
        File data = Environment.getDataDirectory();

        if (sd.canWrite()) {
            File f = new File(sd.getAbsolutePath() + "/AccountManagement");
            if (!f.exists()) {
                f.mkdir();
            }
            Date currentDate = new Date();
            String currentDateStr = newFormat1.format(currentDate);

            currentDateStr = currentDateStr.trim();
            System.out.println(
                    "---------------------------------------------------------------" + currentDateStr);
            String backupDBPath = "AccountManagement/backup_" + currentDateStr + ".db";
            File backupDB = new File(sd, backupDBPath);

            if (currentDB.exists()) {
                FileChannel src = new FileInputStream(currentDB).getChannel();
                FileChannel dst = new FileOutputStream(backupDB).getChannel();
                dst.transferFrom(src, 0, src.size());
                src.close();
                dst.close();
            }
        }
    } catch (Exception e) {
        System.out.println(e);
    }
}

From source file:Main.java

public static void copyFileUsingFileChannels(File source, File dest) throws IOException {
    FileChannel inputChannel = null;
    FileChannel outputChannel = null;
    try {//from  w  w w  .ja  va 2 s.c  om
        inputChannel = new FileInputStream(source).getChannel();
        outputChannel = new FileOutputStream(dest).getChannel();
        outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
    } finally {
        inputChannel.close();
        outputChannel.close();
    }
}

From source file:Main.java

private static void copyFileUsingFileChannels(File source, File dest) throws IOException {
    FileChannel inputChannel = null;
    FileChannel outputChannel = null;
    try {/*  w  ww  .  j av  a  2  s.  co m*/
        inputChannel = new FileInputStream(source).getChannel();
        outputChannel = new FileOutputStream(dest).getChannel();
        outputChannel.transferFrom(inputChannel, 0, inputChannel.size());
    } finally {
        if (inputChannel != null)
            inputChannel.close();
        if (outputChannel != null)
            outputChannel.close();
    }
}