docs: public static String getSQL(String sql, StatementParameter param) {
  		int i = 0;
  		while (sql.indexOf('?') > -1) {
  			if (param == null) {
  				throw new InvalidParamDataAccessException("没有设置参数.");
  			}
  			if (i >= param.size()) {
  				return sql;
  			}
  			Class<?> type = param.getType(i);
  			Object obj = param.getObject(i);
  			String value = getValue(type, obj);
  			sql = sql.substring(0, sql.indexOf('?')) + value + sql.substring(sql.indexOf('?') + 1, sql.length());
  			i++;
  		}
  		return sql;//
  	}