Example usage for java.io BufferedInputStream read

Introduction

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

Prototype

public synchronized int read(byte b[], int off, int len) throws IOException 

Source Link

Document

Reads bytes from this byte-input stream into the specified byte array, starting at the given offset.

Usage

From source file:Main.java

public static String getCharset(File file) {
    String charset = "GBK";
    byte[] first3Bytes = new byte[3];
    try {/*from w ww.j  a v  a  2  s. com*/
        boolean checked = false;
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
        bis.mark(0);
        int read = bis.read(first3Bytes, 0, 3);
        if (read == -1)
            return charset;
        if (first3Bytes[0] == (byte) 0xFF && first3Bytes[1] == (byte) 0xFE) {
            charset = "UTF-16LE";
            checked = true;
        } else if (first3Bytes[0] == (byte) 0xFE && first3Bytes[1] == (byte) 0xFF) {
            charset = "UTF-16BE";
            checked = true;
        } else if (first3Bytes[0] == (byte) 0xEF && first3Bytes[1] == (byte) 0xBB
                && first3Bytes[2] == (byte) 0xBF) {
            charset = "UTF-8";
            checked = true;
        }
        bis.reset();
        if (!checked) {
            int loc = 0;
            while ((read = bis.read()) != -1) {
                loc++;
                if (read >= 0xF0)
                    break;
                if (0x80 <= read && read <= 0xBF)
                    break;
                if (0xC0 <= read && read <= 0xDF) {
                    read = bis.read();
                    if (0x80 <= read && read <= 0xBF)
                        continue;
                    else
                        break;
                } else if (0xE0 <= read && read <= 0xEF) {
                    read = bis.read();
                    if (0x80 <= read && read <= 0xBF) {
                        read = bis.read();
                        if (0x80 <= read && read <= 0xBF) {
                            charset = "UTF-8";
                            break;
                        } else
                            break;
                    } else
                        break;
                }
            }
        }
        bis.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return charset;
}

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From source file:Main.java

public static String readFromFile(String file) {
    try {/*  www. j  a v a2s.  c o m*/
        File f = new File(file);

        if (!f.exists() || !f.canRead()) {
            return null;
        }

        BufferedInputStream ipt = new BufferedInputStream(new FileInputStream(f));

        byte[] buf = new byte[512];
        StringBuilder sb = new StringBuilder();

        while (ipt.available() > 0) {
            int len = ipt.read(buf, 0, 512);
            sb.append(new String(buf, 0, len, "UTF-8"));
        }

        ipt.close();
        return sb.toString();
    } catch (Exception e) {
        return null;
    }
}

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From source file:jeevlet.representation.BlobRepresentation.java

private static void copy(InputStream in, OutputStream output) throws IOException {
    BufferedInputStream input = new BufferedInputStream(in);
    try {/*from www.  ja v  a 2  s.c  om*/
        byte buffer[] = new byte[BUF_SIZE];
        int nRead;
        do {
            nRead = input.read(buffer, 0, BUF_SIZE);
            output.write(buffer, 0, nRead);

        } while (nRead == BUF_SIZE);
        input.close();
    } catch (IOException e) {
        input.close();
        throw e;
    }
    output.flush();
}

---

From source file:Main.java

public static byte[] retrieveImageData_fromUrl(String imageUrl) throws IOException {
    URL url = new URL(imageUrl);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    connection.setRequestProperty("User-Agent",
            System.getProperties().getProperty("http.agent") + " FacebookAndroidSDK");

    // determine the image size and allocate a buffer
    int fileSize = connection.getContentLength();
    byte[] imageData = new byte[fileSize];

    // download the file
    Log.d(TAG, "fetching image " + imageUrl + " (" + fileSize + ")");

    if (fileSize > 0) {

        BufferedInputStream istream = new BufferedInputStream(connection.getInputStream());
        int bytesRead = 0;
        int offset = 0;
        while (bytesRead != -1 && offset < fileSize) {
            bytesRead = istream.read(imageData, offset, fileSize - offset);
            offset += bytesRead;/*  ww  w  . j  ava 2 s . c o  m*/
        }

        istream.close();
    } else
        Log.d(TAG, "fileSize is 0! skipping");

    // clean up
    connection.disconnect();

    return imageData;
}

---

From source file:Main.java

public static String readTextFile(URL url) throws IOException {
    if (url == null)
        return "";
    BufferedInputStream bis = null;
    StringBuffer sb = new StringBuffer();
    try {/*from w  ww .ja  va 2 s .  c  o  m*/
        bis = new BufferedInputStream(url.openStream());
        byte buff[] = new byte[2048];
        int bytesRead;
        while (-1 != (bytesRead = bis.read(buff, 0, buff.length)))
            sb.append(new String(buff, 0, bytesRead));
    } catch (IOException e) {
        throw e;
    }
    return sb.toString();
}

---

From source file:jeeves.utils.BLOB.java

private static void copy(InputStream in, OutputStream output) throws IOException {
    BufferedInputStream input = new BufferedInputStream(in);
    try {//from  w  w  w  . jav  a  2  s .c  o  m
        byte buffer[] = new byte[BUF_SIZE];
        int nRead;
        do {
            nRead = input.read(buffer, 0, BUF_SIZE);
            output.write(buffer, 0, nRead);

        } while (nRead == BUF_SIZE);
        input.close();
    } catch (IOException e) {
        input.close();
        throw e;
    }
}

---

From source file:Main.java

private static void compressFile(File file, ZipOutputStream out, String basedir) {
    if (!file.exists()) {
        return;/*from   w w  w  .j  av  a2 s . co m*/
    }
    try {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
        ZipEntry entry = new ZipEntry(basedir + file.getName());
        out.putNextEntry(entry);
        int count;
        byte data[] = new byte[BUFFER];
        while ((count = bis.read(data, 0, BUFFER)) != -1) {
            out.write(data, 0, count);
        }
        bis.close();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

---

From source file:Main.java

/**
 * Compress files to a zip/*from   w  ww. ja  va2  s . c  om*/
 * @param zip
 * @param files
 * @throws IOException 
 */
public static void compressToZip(File zip, File[] files) throws IOException {
    byte data[] = new byte[BUFFER];
    FileOutputStream fozip = new FileOutputStream(zip);
    ZipOutputStream zo = new ZipOutputStream(new BufferedOutputStream(fozip));
    for (int i = 0; i < files.length; i++) {
        System.out.println("Adding:" + files[i]);
        FileInputStream fi = new FileInputStream(files[i]);
        BufferedInputStream origin = new BufferedInputStream(fi, BUFFER);
        ZipEntry zipentry = new ZipEntry(files[i].getName());
        zo.putNextEntry(zipentry);
        int count;
        while ((count = origin.read(data, 0, BUFFER)) != -1) {
            zo.write(data, 0, count);
        }
        origin.close();
    }
    zo.close();
}

---

From source file:Main.java

public static void copyInputToFile(InputStream in, String path) {
    BufferedInputStream bis = null;
    FileOutputStream fos = null;//from  w w  w . ja v a  2 s  .c om
    try {
        byte[] buffer = new byte[10 * 1024];
        bis = new BufferedInputStream(in);
        fos = new FileOutputStream(path);
        int a = bis.read(buffer, 0, buffer.length);
        while (a != -1) {
            fos.write(buffer, 0, a);
            fos.flush();
            a = bis.read(buffer, 0, buffer.length);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        closeOutputStream(fos);
        closeInputStream(bis);
        closeInputStream(in);
    }
}

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From source file:Main.java

private static boolean addEntryInputStream(ZipOutputStream zos, String entryName, InputStream inputStream) {
    final ZipEntry zipEntry = new ZipEntry(entryName);
    try {//from  w  w  w . j av a  2s  .  c  om
        zos.putNextEntry(zipEntry);
    } catch (final ZipException e) {

        // Ignore duplicate entry - no overwriting
        return false;
    } catch (final IOException e) {
        throw new RuntimeException("Error while adding zip entry " + zipEntry, e);
    }
    final int buffer = 2048;
    final BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream, buffer);
    int count;
    try {
        final byte data[] = new byte[buffer];
        while ((count = bufferedInputStream.read(data, 0, buffer)) != -1) {
            zos.write(data, 0, count);
        }
        bufferedInputStream.close();
        inputStream.close();
        zos.closeEntry();
        return true;
    } catch (final IOException e) {
        throw new RuntimeException(e);
    }
}

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