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ApexでSJIS指定バイト数まで文字列を切り詰め

Last updated at Posted at 2024-08-07
  // SJIS指定バイト数まで文字列切り詰め
  private static String truncateToSjisByteLength(String str, Integer maxLen) {
    if (str == null) {
      return null;
    }
    Integer len = 0;
    for (Integer i = 0; i < str.length(); i++) {
      len += str.codePointAt(i) <= 127 ? 1 : 2;
      if (len > maxLen) {
        return str.substring(0, i);
      }
    }
    return str;
  }
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