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:ch.entwine.weblounge.common.impl.util.TestUtils.java

/**
 * Loads the <code>JSON</code> data from the specified file on the class path
 * and returns it after having stripped off any newlines, line breaks and
 * otherwise disturbing spaces and characters.
 * //from  w  w  w  .ja va 2 s.c o m
 * @param path
 *          the resource path
 * @return the contents of the resource
 */
public static String loadJsonFromResource(String path) {
    File templateFile = new File(TestUtils.class.getResource(path).getPath());
    String template = null;
    try {
        byte[] buffer = new byte[(int) templateFile.length()];
        FileInputStream f = new FileInputStream(templateFile);
        f.read(buffer);
        f.close();
        template = new String(buffer, "utf-8");
        template = template.replaceAll("(\"\\s*)", "\"").replaceAll("(\\s*\")+", "\"");
        template = template.replaceAll("(\\s*\\{\\s*)", "{").replaceAll("(\\s*\\}\\s*)", "}");
        template = template.replaceAll("(\\s*\\[\\s*)", "[").replaceAll("(\\s*\\]\\s*)", "]");
        template = template.replaceAll("(\\s*,\\s*)", ",");
    } catch (IOException e) {
        throw new RuntimeException("Error reading test resource at " + path);
    }
    return template;
}

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From source file:com.asual.lesscss.ResourceUtils.java

public static byte[] readBinaryFile(File source) throws IOException {
    byte[] result;
    try {/*  w  w  w  .  ja  va 2 s .c om*/
        ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
        FileInputStream input = new FileInputStream(source);
        try {
            byte[] buffer = new byte[1024];
            int bytesRead = -1;
            while ((bytesRead = input.read(buffer)) != -1) {
                byteStream.write(buffer, 0, bytesRead);
            }
            result = byteStream.toByteArray();
        } finally {
            byteStream.close();
            input.close();
        }
    } catch (IOException e) {
        logger.error("Can't read '" + source.getAbsolutePath() + "'.");
        throw e;
    }
    return result;
}

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From source file:Main.java

public static String checkSum(String path) {
    String checksum = null;//from   ww w  .j a va  2 s .  co m
    try {
        FileInputStream fis = new FileInputStream(path);
        MessageDigest md = MessageDigest.getInstance("MD5");

        //Using MessageDigest update() method to provide input
        byte[] buffer = new byte[8192];
        int numOfBytesRead;
        while ((numOfBytesRead = fis.read(buffer)) > 0) {
            md.update(buffer, 0, numOfBytesRead);
        }
        byte[] hash = md.digest();
        checksum = new BigInteger(1, hash).toString(16); //don't use this, truncates leading zero
    } catch (IOException | NoSuchAlgorithmException ignored) {
    }
    assert checksum != null;
    return checksum.trim();
}

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From source file:eu.databata.engine.util.PropagationUtils.java

/**
 * This method is suitable for reading files not larger than 2 GB.
 */// w ww.  j  av  a 2 s  .  c  o m
private static String readFile(File file, String encoding) {
    String result = null;
    try {
        FileInputStream inputStream = new FileInputStream(file);
        try {
            byte[] bytes = new byte[(int) inputStream.getChannel().size()];
            inputStream.read(bytes);
            result = Charset.forName(encoding).decode(ByteBuffer.wrap(bytes)).toString();
        } finally {
            inputStream.close();
        }
    } catch (Exception e) {
        LOG.warn("Failed to read file: " + file.getName());
        throw new RuntimeException(e);
    }
    return dos2Unix(result);
}

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From source file:com.littcore.io.util.ZipUtils.java

/**
 * ?./*from  ww w.j a v a2 s .c  o m*/
 * 
 * @param out ZIP?
 * @param srcFile ?
 * @param basePath 
 * 
 * @throws IOException Signals that an I/O exception has occurred.
 */
private static void zip(ZipOutputStream out, File srcFile, String basePath) throws IOException {
    if (srcFile.isDirectory()) {
        File[] files = srcFile.listFiles();

        if (files.length == 0) {
            out.putNextEntry(new ZipEntry(basePath + srcFile.getName() + "/")); //?
            out.closeEntry();
        } else {
            basePath += srcFile.getName() + "/";
            for (int i = 0; i < files.length; i++) {
                zip(out, files[i], basePath);
            }
        }

    } else {
        out.putNextEntry(new ZipEntry(basePath + srcFile.getName()));
        FileInputStream in = new FileInputStream(srcFile);
        int len;
        byte[] buf = new byte[BUFFERED_SIZE];
        while ((len = in.read(buf)) > 0) {
            out.write(buf, 0, len);
        }
        out.closeEntry();
        in.close();
    }
}

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From source file:Main.java

public static boolean copyFileTo(File srcFile, File destFile) throws IOException {
    if (srcFile == null || destFile == null) {
        return false;
    }/*from  www  .  java  2s. c  o  m*/
    if (srcFile.isDirectory() || destFile.isDirectory())
        return false;
    if (!srcFile.exists()) {
        return false;
    }
    if (!destFile.exists()) {
        createFile(destFile.getAbsolutePath());
    }
    FileInputStream fis = new FileInputStream(srcFile);
    FileOutputStream fos = new FileOutputStream(destFile);
    int readLen = 0;
    byte[] buf = new byte[1024];
    while ((readLen = fis.read(buf)) != -1) {
        fos.write(buf, 0, readLen);
    }
    fos.flush();
    fos.close();
    fis.close();
    return true;
}

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From source file:com.twinsoft.convertigo.engine.AttachmentManager.java

static public AttachmentDetails getAttachment(Element eAttachment) {
    try {//  w w w.j  a  va2s  . c  o  m
        if ("attachment".equals(eAttachment.getTagName())
                && "attachment".equals(eAttachment.getAttribute("type"))) {
            String attr;
            final String name = eAttachment.getAttribute("name");
            final String contentType = eAttachment.getAttribute("content-type");
            final byte[][] data = new byte[1][];
            if ((attr = eAttachment.getAttribute("local-url")) != null && attr.length() > 0) {
                FileInputStream fis = null;
                try {
                    fis = new FileInputStream(attr);
                    fis.read(data[0] = new byte[fis.available()]);
                } finally {
                    if (fis != null)
                        fis.close();
                }

            } else if ((attr = eAttachment.getAttribute("encoding")) != null && attr.length() > 0) {
                if ("base64".equals(attr)) {
                    data[0] = Base64.decodeBase64(eAttachment.getTextContent());
                }
            }
            if (data[0] != null) {
                return new AttachmentDetails() {
                    public byte[] getData() {
                        return data[0];
                    }

                    public String getName() {
                        return name;
                    }

                    public String getContentType() {
                        return contentType;
                    }
                };
            }
        }
    } catch (Exception e) {
        Engine.logEngine.error("failed to make AttachmentDetails", e);
    }
    return null;
}

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From source file:Main.java

public static void copyDirFile(String oldPath, String newPath) {
    try {//from w  w  w  .  jav a  2 s .  c  o  m
        new File(newPath).mkdirs();
        File a = new File(oldPath);
        System.out.println("oldPath:" + oldPath);
        String[] file = a.list();
        File temp = null;
        for (int i = 0; i < file.length; i++) {
            if (oldPath.endsWith(File.separator)) {
                temp = new File(oldPath + file[i]);
            } else {
                temp = new File(oldPath + File.separator + file[i]);
            }
            if (temp.isFile()) {
                FileInputStream input = new FileInputStream(temp);
                FileOutputStream output = new FileOutputStream(newPath + "/" + (temp.getName()).toString());
                byte[] b = new byte[1024 * 5];
                int len;
                while ((len = input.read(b)) != -1) {
                    output.write(b, 0, len);
                }
                output.flush();
                output.close();
                input.close();
            }
            if (temp.isDirectory()) {
                copyDirFile(oldPath + "/" + file[i], newPath + "/" + file[i]);
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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From source file:com.sun.portal.os.portlets.PortletChartUtilities.java

private static void writeDefaultImage(OutputStream out, String defaultImagePath) throws IOException {

    FileInputStream fin = null;
    try {//from  w  ww .  j  av a2  s .  c  o m
        byte[] b = new byte[1024];
        fin = new FileInputStream(defaultImagePath);
        while (fin.read(b) != -1) {
            out.write(b);
        }
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } finally {
        fin.close();
    }
}

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From source file:Main.java

/**
 * File to Base64// w ww . j  a  va2 s  . c om
 * @param filePath
 * @return
 * @throws FileNotFoundException
 * @throws IOException
 */
public static String getBase64StringFromFile(String filePath) throws FileNotFoundException, IOException {
    byte[] buffer = null;
    File file = new File(filePath);
    FileInputStream fis = null;
    ByteArrayOutputStream bos = null;
    byte[] b = new byte[1000];
    try {
        fis = new FileInputStream(file);
        bos = new ByteArrayOutputStream(1000);
        int n;
        while ((n = fis.read(b)) != -1) {
            bos.write(b, 0, n);
        }
        fis.close();
        bos.close();
        buffer = bos.toByteArray();
    } catch (FileNotFoundException e) {
        throw e;
    } catch (IOException e) {
        throw e;
    } finally {
        if (bos != null) {
            try {
                bos.close();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
        if (fis != null) {
            try {
                fis.close();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
    }

    return Base64.encodeToString(buffer, Base64.DEFAULT);
}

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