程序包 com.digiwin.dap.middleware.emc.common.utils

类 StreamUtils

java.lang.Object
com.digiwin.dap.middleware.emc.common.utils.StreamUtils
public abstract class StreamUtils extends Object
Simple utility methods for dealing with streams. All affected streams are left open when done. All copy methods use a block size of 4096 bytes.
作者:
fobgochod

  • 字段详细资料

    • BUFFER_SIZE

      public static final int BUFFER_SIZE
      The default buffer size used when copying bytes.
      另请参阅:

  • 构造器详细资料

    • StreamUtils

      public StreamUtils()

  • 方法详细资料

    • copyToByteArray

      public static byte[] copyToByteArray(InputStream in) throws IOException
      Copy the contents of the given InputStream into a new byte array.

      Leaves the stream open when done.

      参数:
      in - the stream to copy from (may be null or empty)
      返回:
      the new byte array that has been copied to (possibly empty)
      抛出:
      IOException - in case of I/O errors

    • copyToString

      public static String copyToString(InputStream in, Charset charset) throws IOException
      Copy the contents of the given InputStream into a String.

      Leaves the stream open when done.

      参数:
      in - the InputStream to copy from (may be null or empty)
      charset - the Charset to use to decode the bytes
      返回:
      the String that has been copied to (possibly empty)
      抛出:
      IOException - in case of I/O errors

    • copyToString

      public static String copyToString(ByteArrayOutputStream baos, Charset charset)
      Copy the contents of the given ByteArrayOutputStream into a String.

      This is a more effective equivalent of new String(baos.toByteArray(), charset).

      参数:
      baos - the ByteArrayOutputStream to be copied into a String
      charset - the Charset to use to decode the bytes
      返回:
      the String that has been copied to (possibly empty)

    • copy

      public static void copy(byte[] in, OutputStream out) throws IOException
      Copy the contents of the given byte array to the given OutputStream.

      Leaves the stream open when done.

      参数:
      in - the byte array to copy from
      out - the OutputStream to copy to
      抛出:
      IOException - in case of I/O errors

    • copy

      public static void copy(String in, Charset charset, OutputStream out) throws IOException
      Copy the contents of the given String to the given OutputStream.

      Leaves the stream open when done.

      参数:
      in - the String to copy from
      charset - the Charset
      out - the OutputStream to copy to
      抛出:
      IOException - in case of I/O errors

    • copy

      public static int copy(InputStream in, OutputStream out) throws IOException
      Copy the contents of the given InputStream to the given OutputStream.

      Leaves both streams open when done.

      参数:
      in - the InputStream to copy from
      out - the OutputStream to copy to
      返回:
      the number of bytes copied
      抛出:
      IOException - in case of I/O errors

    • copyRange

      public static long copyRange(InputStream in, OutputStream out, long start, long end) throws IOException
      Copy a range of content of the given InputStream to the given OutputStream.

      If the specified range exceeds the length of the InputStream, this copies up to the end of the stream and returns the actual number of copied bytes.

      Leaves both streams open when done.

      参数:
      in - the InputStream to copy from
      out - the OutputStream to copy to
      start - the position to start copying from
      end - the position to end copying
      返回:
      the number of bytes copied
      抛出:
      IOException - in case of I/O errors

    • drain

      public static int drain(InputStream in) throws IOException
      Drain the remaining content of the given InputStream.

      Leaves the InputStream open when done.

      参数:
      in - the InputStream to drain
      返回:
      the number of bytes read
      抛出:
      IOException - in case of I/O errors

    • emptyInput

      public static InputStream emptyInput()
      Return an efficient empty InputStream.
      返回:
      a ByteArrayInputStream based on an empty byte array

    • nonClosing

      public static InputStream nonClosing(InputStream in)
      Return a variant of the given InputStream where calling close() has no effect.
      参数:
      in - the InputStream to decorate
      返回:
      a version of the InputStream that ignores calls to close

    • nonClosing

      public static OutputStream nonClosing(OutputStream out)
      Return a variant of the given OutputStream where calling close() has no effect.
      参数:
      out - the OutputStream to decorate
      返回:
      a version of the OutputStream that ignores calls to close