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:uploadProcess.java

public static boolean encrypt(File inputFolder, File outputFolder, String fileName, String patientID) {
    try {//w  w  w  .j  a va  2  s.co  m

        String ukey = GetKey.getPatientKey(patientID);
        File filePath = new File(inputFolder.getAbsolutePath() + File.separator + fileName);
        FileInputStream fis = new FileInputStream(filePath);
        File outputFile = new File(outputFolder.getAbsolutePath() + File.separator + fileName);
        FileOutputStream fos = new FileOutputStream(outputFile);
        byte[] k = ukey.getBytes();
        SecretKeySpec key = new SecretKeySpec(k, "AES");
        //            System.out.println(key);
        Cipher enc = Cipher.getInstance("AES");
        enc.init(Cipher.ENCRYPT_MODE, key);
        CipherOutputStream cos = new CipherOutputStream(fos, enc);
        byte[] buf = new byte[1024];
        int read;
        while ((read = fis.read(buf)) != -1) {
            cos.write(buf, 0, read);
        }
        fis.close();
        fos.flush();
        cos.close();

        //Upload File to cloud
        DropboxUpload upload = new DropboxUpload();
        upload.uploadFile(outputFolder, fileName, StoragePath.getDropboxDir() + patientID);
        DeleteDirectory.delete(outputFolder);
        return true;
    } catch (Exception e) {
        System.out.println("Error: " + e);
    }
    return false;
}

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From source file:com.polyvi.xface.util.XFileUtils.java

/**
 * ??/*w  ww  . ja v  a 2 s  .  co  m*/
 *
 * @param filePath
 *            ?
 * @return ??
 */
public static String readFileContent(String filePath) {
    if (null == filePath) {
        return null;
    }
    try {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        FileInputStream fis = new FileInputStream(filePath);

        byte[] buffer = new byte[XConstant.BUFFER_LEN];
        int len = 0;
        while ((len = fis.read(buffer)) != -1) {
            bos.write(buffer, 0, len);
        }

        String content = bos.toString();
        bos.close();
        fis.close();
        return content;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
        return null;
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

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From source file:eu.planets_project.tb.impl.data.util.DataHandlerImpl.java

public static String encodeToBase64ByteArrayString(File src) throws IOException {
    byte[] b = new byte[(int) src.length()];
    FileInputStream fis = null;
    try {/*from www  . j  av  a2s .  c o  m*/
        fis = new FileInputStream(src);
        fis.read(b);
    } catch (IOException e) {
        throw e;
    } finally {
        fis.close();
    }

    //encode String
    return Base64.encodeBase64(b).toString();
}

---

From source file:graphene.util.fs.FileUtils.java

public static void copyFile(final File srcFile, final File dstFile) throws IOException {
        // noinspection ResultOfMethodCallIgnored
        dstFile.getParentFile().mkdirs();
        FileInputStream input = null;
        FileOutputStream output = null;
        try {//from ww  w.ja va  2s.  c  om
            input = new FileInputStream(srcFile);
            output = new FileOutputStream(dstFile);
            final int bufferSize = 1024;
            final byte[] buffer = new byte[bufferSize];
            int bytesRead;
            while ((bytesRead = input.read(buffer)) != -1) {
                output.write(buffer, 0, bytesRead);
            }
        } catch (final IOException e) {
            // Because the message from this cause may not mention which file
            // it's about
            throw new IOException("Could not copy '" + srcFile + "' to '" + dstFile + "'", e);
        } finally {
            if (input != null) {
                input.close();
            }
            if (output != null) {
                output.close();
            }
        }
    }

---

From source file:com.hipu.bdb.util.FileUtils.java

protected static void workaroundCopyFile(final File src, final File dest) throws IOException {
    FileInputStream from = null;
    FileOutputStream to = null;/*  ww  w. java  2s. co  m*/
    try {
        from = new FileInputStream(src);
        to = new FileOutputStream(dest);
        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) {
                e.printStackTrace();
            }
        }
        if (to != null) {
            try {
                to.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

---

From source file:com.arc.embeddedcdt.gui.jtag.ConfigJTAGTab.java

public static void copyFile(File in, File out) {
    try {/*w ww  .  j a  va 2  s. c om*/
        FileInputStream fis = new FileInputStream(in);
        FileOutputStream fos = new FileOutputStream(out);
        try {
            byte[] buf = new byte[1024];
            int i = 0;
            while ((i = fis.read(buf)) != -1) {
                fos.write(buf, 0, i);
            }
        } finally {
            if (fis != null)
                fis.close();
            if (fos != null)
                fos.close();
        }
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

---

From source file:FileCopy.java

/**
 * The static method that actually performs the file copy. Before copying the
 * file, however, it performs a lot of tests to make sure everything is as it
 * should be./*from  w ww  . j av  a 2 s .c  om*/
 */
public static void copy(String from_name, String to_name) throws IOException {
    File from_file = new File(from_name); // Get File objects from Strings
    File to_file = new File(to_name);

    // First make sure the source file exists, is a file, and is readable.
    // These tests are also performed by the FileInputStream constructor
    // which throws a FileNotFoundException if they fail.
    if (!from_file.exists())
        abort("no such source file: " + from_name);
    if (!from_file.isFile())
        abort("can't copy directory: " + from_name);
    if (!from_file.canRead())
        abort("source file is unreadable: " + from_name);

    // If the destination is a directory, use the source file name
    // as the destination file name
    if (to_file.isDirectory())
        to_file = new File(to_file, from_file.getName());

    // If the destination exists, make sure it is a writeable file
    // and ask before overwriting it. If the destination doesn't
    // exist, make sure the directory exists and is writeable.
    if (to_file.exists()) {
        if (!to_file.canWrite())
            abort("destination file is unwriteable: " + to_name);
        // Ask whether to overwrite it
        System.out.print("Overwrite existing file " + to_file.getName() + "? (Y/N): ");
        System.out.flush();
        // Get the user's response.
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String response = in.readLine();
        // Check the response. If not a Yes, abort the copy.
        if (!response.equals("Y") && !response.equals("y"))
            abort("existing file was not overwritten.");
    } else {
        // If file doesn't exist, check if directory exists and is
        // writeable. If getParent() returns null, then the directory is
        // the current dir. so look up the user.dir system property to
        // find out what that is.
        String parent = to_file.getParent(); // The destination directory
        if (parent == null) // If none, use the current directory
            parent = System.getProperty("user.dir");
        File dir = new File(parent); // Convert it to a file.
        if (!dir.exists())
            abort("destination directory doesn't exist: " + parent);
        if (dir.isFile())
            abort("destination is not a directory: " + parent);
        if (!dir.canWrite())
            abort("destination directory is unwriteable: " + parent);
    }

    // If we've gotten this far, then everything is okay.
    // So we copy the file, a buffer of bytes at a time.
    FileInputStream from = null; // Stream to read from source
    FileOutputStream to = null; // Stream to write to destination
    try {
        from = new FileInputStream(from_file); // Create input stream
        to = new FileOutputStream(to_file); // Create output stream
        byte[] buffer = new byte[4096]; // To hold file contents
        int bytes_read; // How many bytes in buffer

        // Read a chunk of bytes into the buffer, then write them out,
        // looping until we reach the end of the file (when read() returns
        // -1). Note the combination of assignment and comparison in this
        // while loop. This is a common I/O programming idiom.
        while ((bytes_read = from.read(buffer)) != -1)
            // Read until EOF
            to.write(buffer, 0, bytes_read); // write
    }
    // Always close the streams, even if exceptions were thrown
    finally {
        if (from != null)
            try {
                from.close();
            } catch (IOException e) {
                ;
            }
        if (to != null)
            try {
                to.close();
            } catch (IOException e) {
                ;
            }
    }
}

---

From source file:com.aurel.track.admin.customize.category.report.ReportBL.java

/**
 * Zips a directory content into a zip stream
 * @param dirZip/*from   w  w  w .  j ava  2 s . c  om*/
 * @param zipOut
 * @param rootPath
 */
public static void zipFiles(File dirZip, ZipOutputStream zipOut, String rootPath) {
    try {
        // get a listing of the directory content
        File[] dirList = dirZip.listFiles();
        byte[] readBuffer = new byte[2156];
        int bytesIn;
        // loop through dirList, and zip the files
        for (int i = 0; i < dirList.length; i++) {
            File f = dirList[i];
            if (f.isDirectory()) {
                // if the File object is a directory, call this
                // function again to add its content recursively
                String filePath = f.getAbsolutePath();
                zipFiles(new File(filePath), zipOut, rootPath);
                // loop again
                continue;
            }
            // if we reached here, the File object f was not a directory
            // create a FileInputStream on top of f
            FileInputStream fis = new FileInputStream(f);
            // create a new zip entry
            ZipEntry anEntry = new ZipEntry(
                    f.getAbsolutePath().substring(rootPath.length() + 1, f.getAbsolutePath().length()));
            // place the zip entry in the ZipOutputStream object
            zipOut.putNextEntry(anEntry);
            // now write the content of the file to the ZipOutputStream
            while ((bytesIn = fis.read(readBuffer)) != -1) {
                zipOut.write(readBuffer, 0, bytesIn);
            }
            // close the Stream
            fis.close();
        }

    } catch (Exception e) {
        LOGGER.error("Zip the " + dirZip.getName() + " failed with " + e.getMessage());
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug(ExceptionUtils.getStackTrace(e));
        }
    }
}

---

From source file:com.easyhome.common.modules.network.HttpManager.java

private static void imageContentToUpload(OutputStream out, String imgpath) throws WeiboException {
    if (imgpath == null) {
        return;//from  www. j  av  a2  s. co  m
    }
    StringBuilder temp = new StringBuilder();

    temp.append(MP_BOUNDARY).append("\r\n");
    temp.append("Content-Disposition: form-data; name=\"pic\"; filename=\"").append("news_image")
            .append("\"\r\n");
    String filetype = "image/png";
    temp.append("Content-Type: ").append(filetype).append("\r\n\r\n");
    byte[] res = temp.toString().getBytes();
    FileInputStream input = null;
    try {
        out.write(res);
        input = new FileInputStream(imgpath);
        byte[] buffer = new byte[1024 * 50];
        while (true) {
            int count = input.read(buffer);
            if (count == -1) {
                break;
            }
            out.write(buffer, 0, count);
        }
        out.write("\r\n".getBytes());
        out.write(("\r\n" + END_MP_BOUNDARY).getBytes());
    } catch (IOException e) {
        throw new WeiboException(e);
    } finally {
        if (null != input) {
            try {
                input.close();
            } catch (IOException e) {
                throw new WeiboException(e);
            }
        }
    }
}

---

From source file:com.headswilllol.basiclauncher.Launcher.java

public static String md5(String path) { // convenience method for calculating MD5 hash of a file
    try {//w ww .j  a v  a 2  s  . c om
        MessageDigest md = MessageDigest.getInstance("MD5");
        FileInputStream fis = new FileInputStream(path);
        byte[] dataBytes = new byte[1024];

        int nread;
        while ((nread = fis.read(dataBytes)) != -1) {
            md.update(dataBytes, 0, nread);
        }
        fis.close();

        byte[] mdbytes = md.digest();

        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < mdbytes.length; i++) {
            String hex = Integer.toHexString(0xff & mdbytes[i]);
            if (hex.length() == 1)
                sb.append('0');
            sb.append(hex);
        }
        return sb.toString();
    } catch (Exception ex) {
        ex.printStackTrace();
        System.err.println("Failed to calculate checksum for " + path);
        createExceptionLog(ex);
        progress = "Failed to calculate checksum for file!";
        fail = "Errors occurred, see exception log for details";
    }

    return null;
}

---

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