encoding 별로 JAVA 문자열 byte단위로 자르기

public String[] parseStringByBytes(String raw, int len, String encoding) {

 if (raw == null)
  return null;
 String[] ary = null;

 try {
  // raw 의 byte
  byte[] rawBytes = raw.getBytes(encoding);
  int rawLength = rawBytes.length;

  int index = 0;
  int minus_byte_num = 0;
  int offset = 0;

  int hangul_byte_num = encoding.equals("UTF-8") ? 3 : 2;

  if (rawLength > len) {
   int aryLength = (rawLength / len) + (rawLength % len != 0 ? 1 : 0);
   ary = new String[aryLength];

   for (int i = 0; i < aryLength; i++) {
    minus_byte_num = 0;
    offset = len;

    if (index + offset > rawBytes.length) {
     offset = rawBytes.length - index;
    }

    for (int j = 0; j < offset; j++) {

     if (((int) rawBytes[index + j] & 0x80) != 0) {
      minus_byte_num++;
     }
    }

    if (minus_byte_num % hangul_byte_num != 0) {
     offset -= minus_byte_num % hangul_byte_num;
    }

    ary[i] = new String(rawBytes, index, offset, encoding);
    index += offset;
   }
  } else {
   ary = new String[] { raw };
  }
 } catch (Exception e) {

 }
 return ary;
}

 

 

출처 : http://blog.naver.com/PostView.nhn?blogId=nackhwa7&logNo=140103352320