private ErrMessageResult errMessageForQuery(String queryStr, int errIndex) {
    int line = 1;
    int scroffset = 0;
    String lineMess = queryStr;
    char[] chars = queryStr.toCharArray();  -->这里没有考虑长度问题。 errIndex后端返回的可能大于 queryStr的长度
    for (int i = 0; i <= errIndex; i++) {
      char ch = chars[i];
      if (ch == '\n') {
        line++;
        scroffset = errIndex - (i + 1);
        lineMess = lineMess.substring(lineMess.indexOf("\n") + 1);
      }
    }
    if (scroffset == 0) {
      scroffset = errIndex;
    }
    if (lineMess.contains("\n")) {
      lineMess = lineMess.substring(0, lineMess.indexOf("\n"));
    }
    return new ErrMessageResult(line, scroffset, lineMess);
  }