ProblemwiththeBinaryCodecclass

import org.apache.commons.codec.binary.BinaryCodec;



System.out.println(BinaryCodec.toAsciiString(new byte[] { 'a' }));

// output 01100001

System.out.println(BinaryCodec.toAsciiString(new byte[] { 'b' }));

// output 01100010

System.out.println(BinaryCodec.toAsciiString(new byte[] { 'a', 'b' }));

// output 0110001001100001(ba), why not 0110000101100010(ab)?

  // 为什么设计成倒序呢？

{

    var sle = "abc".getBytes(StandardCharsets.UTF_16LE);

    System.out.println(Bytes.asList(sle).stream()

            .map(b -> StringUtils.leftPad(Integer.toBinaryString(b), 8, '0'))

            .collect(Collectors.joining(",")));

    // out 01100001,00000000,01100010,00000000,01100011,00000000

    System.out.println(BinaryCodec.toAsciiString(sle).replaceAll("(.{8})", "$1,"));

    // out 00000000,01100011,00000000,01100010,00000000,01100001,

}

{

    var sbe = "abc".getBytes(StandardCharsets.UTF_16BE);

    System.out.println(Bytes.asList(sbe).stream()

            .map(b -> StringUtils.leftPad(Integer.toBinaryString(b), 8, '0'))

            .collect(Collectors.joining(",")));

    // out 00000000,01100001,00000000,01100010,00000000,01100011

    System.out.println(BinaryCodec.toAsciiString(sbe).replaceAll("(.{8})", "$1,"));

    // out 01100011,00000000,01100010,00000000,01100001,00000000,

}