java.util.zip.CRC32.getValue()方法的使用及代码示例

x33g5p2x  于2022-01-17 转载在 其他  
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本文整理了Java中java.util.zip.CRC32.getValue()方法的一些代码示例,展示了CRC32.getValue()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台,是从一些精选项目中提取出来的代码,具有较强的参考意义,能在一定程度帮忙到你。CRC32.getValue()方法的具体详情如下:
包路径:java.util.zip.CRC32
类名称:CRC32
方法名:getValue

CRC32.getValue介绍

[英]Returns the CRC32 checksum for all input received.
[中]返回接收到的所有输入的CRC32校验和。

代码示例

代码示例来源:origin: apache/rocketmq

public static int crc32(byte[] array, int offset, int length) {
  CRC32 crc32 = new CRC32();
  crc32.update(array, offset, length);
  return (int) (crc32.getValue() & 0x7FFFFFFF);
}

代码示例来源:origin: dropwizard/dropwizard

private static String hash(byte[] resource) {
  CRC_32.reset();
  CRC_32.update(resource);
  return Long.toHexString(CRC_32.getValue());
}

代码示例来源:origin: libgdx/libgdx

public void endChunk (DataOutputStream target) throws IOException {
    flush();
    target.writeInt(buffer.size() - 4);
    buffer.writeTo(target);
    target.writeInt((int)crc.getValue());
    buffer.reset();
    crc.reset();
  }
}

代码示例来源:origin: guoguibing/librec

int bytesRead;
byte[] buffer = new byte[1024];
CRC32 crc = new CRC32();
for (File file : listFiles(dirPath)) {
  BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
  crc.reset();
  while ((bytesRead = bis.read(buffer)) != -1) {
    crc.update(buffer, 0, bytesRead);
  entry.setCompressedSize(file.length());
  entry.setSize(file.length());
  entry.setCrc(crc.getValue());
  zos.putNextEntry(entry);
  while ((bytesRead = bis.read(buffer)) != -1) {

代码示例来源:origin: commons-io/commons-io

/**
 * Computes the checksum of a file using the CRC32 checksum routine.
 * The value of the checksum is returned.
 *
 * @param file the file to checksum, must not be {@code null}
 * @return the checksum value
 * @throws NullPointerException     if the file or checksum is {@code null}
 * @throws IllegalArgumentException if the file is a directory
 * @throws IOException              if an IO error occurs reading the file
 * @since 1.3
 */
public static long checksumCRC32(final File file) throws IOException {
  final CRC32 crc = new CRC32();
  checksum(file, crc);
  return crc.getValue();
}

代码示例来源:origin: apache/ignite

/**
   * @param crcAlgo CRC algorithm.
   * @param buf Input buffer.
   * @param len Buffer length.
   *
   * @return Crc checksum.
   */
  private static int calcCrc(CRC32 crcAlgo, ByteBuffer buf, int len) {
    int initLimit = buf.limit();

    buf.limit(buf.position() + len);

    crcAlgo.update(buf);

    buf.limit(initLimit);

    return (int)crcAlgo.getValue() ^ 0xFFFFFFFF;
  }
}

代码示例来源:origin: libgdx/libgdx

/** Returns a CRC of the remaining bytes in the stream. */
public String crc (InputStream input) {
  if (input == null) return "" + System.nanoTime(); // fallback
  CRC32 crc = new CRC32();
  byte[] buffer = new byte[4096];
  try {
    while (true) {
      int length = input.read(buffer);
      if (length == -1) break;
      crc.update(buffer, 0, length);
    }
  } catch (Exception ex) {
    try {
      input.close();
    } catch (Exception ignored) {
    }
  }
  return Long.toString(crc.getValue());
}

代码示例来源:origin: weibocom/motan

public static long getCrc32(byte[] b) {
  CRC32 crc = crc32Provider.get();
  crc.reset();
  crc.update(b);
  return crc.getValue();
}

代码示例来源:origin: org.apache.commons/commons-compress

channel.write(ByteBuffer.wrap(headerBytes));
final CRC32 crc32 = new CRC32();
crc32.update(headerBytes);
  .putInt((int) crc32.getValue());
crc32.reset();
crc32.update(bb.array(), SevenZFile.sevenZSignature.length + 6, 20);
bb.putInt(SevenZFile.sevenZSignature.length + 2, (int) crc32.getValue());
bb.flip();
channel.write(bb);

代码示例来源:origin: libgdx/libgdx

public void endChunk (DataOutputStream target) throws IOException {
    flush();
    target.writeInt(buffer.size() - 4);
    buffer.writeTo(target);
    target.writeInt((int)crc.getValue());
    buffer.reset();
    crc.reset();
  }
}

代码示例来源:origin: org.apache.commons/commons-io

/**
 * Computes the checksum of a file using the CRC32 checksum routine.
 * The value of the checksum is returned.
 *
 * @param file  the file to checksum, must not be <code>null</code>
 * @return the checksum value
 * @throws NullPointerException if the file or checksum is <code>null</code>
 * @throws IllegalArgumentException if the file is a directory
 * @throws IOException if an IO error occurs reading the file
 * @since Commons IO 1.3
 */
public static long checksumCRC32(File file) throws IOException {
  CRC32 crc = new CRC32();
  checksum(file, crc);
  return crc.getValue();
}

代码示例来源:origin: libgdx/libgdx

/** Returns a CRC of the remaining bytes in the stream. */
public String crc (InputStream input) {
  if (input == null) return "" + System.nanoTime(); // fallback
  CRC32 crc = new CRC32();
  byte[] buffer = new byte[4096];
  try {
    while (true) {
      int length = input.read(buffer);
      if (length == -1) break;
      crc.update(buffer, 0, length);
    }
  } catch (Exception ex) {
    try {
      input.close();
    } catch (Exception ignored) {
    }
  }
  return Long.toString(crc.getValue());
}

代码示例来源:origin: twitter/distributedlog

/**
   * Generate crc32 for any op which only passes a stream name.
   */
  public static Long streamOpCRC32(String stream) {
    CRC32 crc = requestCRC.get();
    try {
      crc.update(stream.getBytes(UTF_8));
      return crc.getValue();
    } finally {
      crc.reset();
    }
  }
}

代码示例来源:origin: loklak/loklak_server

bytePos = writeInt4(pngBytes, height, bytePos);
bytePos = writeBytes(pngBytes, new byte[]{8, 2, 0, 0, 0}, bytePos);
final CRC32 crc = new CRC32();
crc.reset();
crc.update(pngBytes, startPos, bytePos - startPos);
bytePos = writeInt4(pngBytes, (int) crc.getValue(), bytePos);
crc.reset();
bytePos = writeInt4(pngBytes, nCompressed, bytePos);
bytePos = writeBytes(pngBytes, IDAT, bytePos);
crc.update(IDAT);
System.arraycopy(outBytes.toByteArray(), 0, pngBytes, bytePos, outBytes.size());
outBytes.close();
outBytes = null;
crc.update(pngBytes, bytePos, nCompressed);
bytePos += nCompressed;
bytePos = writeInt4(pngBytes, (int) crc.getValue(), bytePos);
bytePos = writeInt4(pngBytes, 0, bytePos);
bytePos = writeBytes(pngBytes, IEND, bytePos);
crc.reset();
crc.update(IEND);
bytePos = writeInt4(pngBytes, (int) crc.getValue(), bytePos);
return pngBytes;

代码示例来源:origin: voldemort/voldemort

@Override
public byte[] getCheckSum() {
  byte[] returnedCheckSum = new byte[ByteUtils.SIZE_OF_LONG];
  ByteUtils.writeLong(returnedCheckSum, checkSumGenerator.getValue(), 0);
  checkSumGenerator.reset();
  return returnedCheckSum;
}

代码示例来源:origin: Tencent/tinker

public static long getFileCrc32(File file) throws IOException {
  InputStream inputStream = null;
  try {
    inputStream = new BufferedInputStream(new FileInputStream(file));
    CRC32 crc = new CRC32();
    int cnt;
    while ((cnt = inputStream.read()) != -1) {
      crc.update(cnt);
    }
    return crc.getValue();
  } finally {
    StreamUtil.closeQuietly(inputStream);
  }
}

代码示例来源:origin: twitter/distributedlog

/**
 * Generate crc32 for WriteOp.
 */
public static Long writeOpCRC32(String stream, byte[] payload) {
  CRC32 crc = requestCRC.get();
  try {
    crc.update(stream.getBytes(UTF_8));
    crc.update(payload);
    return crc.getValue();
  } finally {
    crc.reset();
  }
}

代码示例来源:origin: igvteam/igv

/**
 * @param buffer
 * @return
 * @throws java.io.IOException
 */
static private long getCrc(byte[] buffer) throws IOException {
  CRC32 crc = new CRC32();
  crc.reset();
  crc.update(buffer, 0, buffer.length);
  return crc.getValue();
}

代码示例来源:origin: org.apache.ant/ant

/**
 * Writes all necessary data for this entry.
 *
 * @since 1.1
 * @throws IOException on error
 * @throws Zip64RequiredException if the entry's uncompressed or
 * compressed size exceeds 4 GByte and {@link #setUseZip64}
 * is {@link Zip64Mode#Never}.
 */
public void closeEntry() throws IOException {
  preClose();
  flushDeflater();
  final Zip64Mode effectiveMode = getEffectiveZip64Mode(entry.entry);
  long bytesWritten = written - entry.dataStart;
  long realCrc = crc.getValue();
  crc.reset();
  final boolean actuallyNeedsZip64 =
    handleSizesAndCrc(bytesWritten, realCrc, effectiveMode);
  closeEntry(actuallyNeedsZip64);
}

代码示例来源:origin: killme2008/Metamorphosis

public static final int crc32(byte[] array, int offset, int length) {
    CRC32 crc32 = new CRC32();
    crc32.update(array, offset, length);
    return (int) (crc32.getValue() & 0x7FFFFFFF);
  }
}

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