core/src/main/java/com/alibaba/fastjson2/util/DateUtils.java [6652:6958]:
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        char y0, y1, y2, y3, m0, m1, d0, d1, h0, h1, i0, i1, s0, s1;
        if (c4 == '-' && c7 == '-' && (c10 == ' ' || c10 == 'T') && c13 == ':' && c16 == ':') {
            // yyyy-MM-dd HH:mm:ss
            // yyyy-MM-dd'T'HH:mm:ss
            y0 = c0;
            y1 = c1;
            y2 = c2;
            y3 = c3;

            m0 = c5;
            m1 = c6;

            d0 = c8;
            d1 = c9;

            h0 = c11;
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c4 == '/' && c7 == '/' && (c10 == ' ' || c10 == 'T') && c13 == ':' && c16 == ':') {
            // yyyy/MM/dd HH:mm:ss
            // yyyy/MM/dd'T'HH:mm:ss
            y0 = c0;
            y1 = c1;
            y2 = c2;
            y3 = c3;

            m0 = c5;
            m1 = c6;

            d0 = c8;
            d1 = c9;

            h0 = c11;
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (((c2 == '/' && c5 == '/') || (c2 == '-' && c5 == '-') || (c2 == '.' && c5 == '.'))
                && c10 == ' '
                && c13 == ':' && c16 == ':') {
            // dd-MM-yyyy HH:mm:ss
            // dd/MM/yyyy HH:mm:ss
            d0 = c0;
            d1 = c1;

            m0 = c3;
            m1 = c4;

            y0 = c6;
            y1 = c7;
            y2 = c8;
            y3 = c9;

            h0 = c11;
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c1 == ' ' && c5 == ' ' && c10 == ' ' && c13 == ':' && c16 == ':') {
            // d MMM yyyy HH:mm:ss
            // 6 DEC 2020 12:13:14
            d0 = '0';
            d1 = c0;

            int month = DateUtils.month(c2, c3, c4);
            if (month > 0) {
                m0 = (char) ('0' + month / 10);
                m1 = (char) ('0' + (month % 10));
            } else {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }

            y0 = c6;
            y1 = c7;
            y2 = c8;
            y3 = c9;

            h0 = c11;
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c2 == ' ' && c6 == ' ' && c11 == ' ' && c13 == ':' && c16 == ':') {
            // dd MMM yyyy H:mm:ss
            // 16 DEC 2020 2:13:14
            d0 = c0;
            d1 = c1;

            int month = DateUtils.month(c3, c4, c5);
            if (month > 0) {
                m0 = (char) ('0' + month / 10);
                m1 = (char) ('0' + (month % 10));
            } else {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }

            y0 = c7;
            y1 = c8;
            y2 = c9;
            y3 = c10;

            h0 = '0';
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c2 == ' ' && c6 == ' ' && c11 == ' ' && c14 == ':' && c16 == ':') {
            // dd MMM yyyy HH:m:ss
            // 16 DEC 2020 12:3:14
            d0 = c0;
            d1 = c1;

            int month = DateUtils.month(c3, c4, c5);
            if (month > 0) {
                m0 = (char) ('0' + month / 10);
                m1 = (char) ('0' + (month % 10));
            } else {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }

            y0 = c7;
            y1 = c8;
            y2 = c9;
            y3 = c10;

            h0 = c12;
            h1 = c13;

            i0 = '0';
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c2 == ' ' && c6 == ' ' && c11 == ' ' && c14 == ':' && c17 == ':') {
            // dd MMM yyyy HH:m:ss
            // 16 DEC 2020 12:3:14
            d0 = c0;
            d1 = c1;

            int month = DateUtils.month(c3, c4, c5);
            if (month > 0) {
                m0 = (char) ('0' + month / 10);
                m1 = (char) ('0' + (month % 10));
            } else {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }

            y0 = c7;
            y1 = c8;
            y2 = c9;
            y3 = c10;

            h0 = c12;
            h1 = c13;

            i0 = c15;
            i1 = c16;

            s0 = '0';
            s1 = c18;
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int year;
        if (y0 >= '0' && y0 <= '9'
                && y1 >= '0' && y1 <= '9'
                && y2 >= '0' && y2 <= '9'
                && y3 >= '0' && y3 <= '9'
        ) {
            year = (y0 - '0') * 1000 + (y1 - '0') * 100 + (y2 - '0') * 10 + (y3 - '0');
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int month;
        if (m0 >= '0' && m0 <= '9'
                && m1 >= '0' && m1 <= '9'
        ) {
            month = (m0 - '0') * 10 + (m1 - '0');

            if ((month == 0 && year != 0) || month > 12) {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int dom;
        if (d0 >= '0' && d0 <= '9'
                && d1 >= '0' && d1 <= '9'
        ) {
            dom = (d0 - '0') * 10 + (d1 - '0');

            int max = 31;
            switch (month) {
                case 2:
                    boolean leapYear = (year & 3) == 0 && ((year % 100) != 0 || (year % 400) == 0);
                    max = leapYear ? 29 : 28;
                    break;
                case 4:
                case 6:
                case 9:
                case 11:
                    max = 30;
                    break;
            }

            if ((dom == 0 && year != 0) || dom > max) {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int hour;
        if (h0 >= '0' && h0 <= '9'
                && h1 >= '0' && h1 <= '9'
        ) {
            hour = (h0 - '0') * 10 + (h1 - '0');
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int minute;
        if (i0 >= '0' && i0 <= '9'
                && i1 >= '0' && i1 <= '9'
        ) {
            minute = (i0 - '0') * 10 + (i1 - '0');
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int second;
        if (s0 >= '0' && s0 <= '9'
                && s1 >= '0' && s1 <= '9'
        ) {
            second = (s0 - '0') * 10 + (s1 - '0');
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        if (year == 0 && month == 0 && dom == 0) {
            year = 1970;
            month = 1;
            dom = 1;
        }

        long utcSeconds;
        {
            long epochDay = calcEpochDay(year, month, dom);
            utcSeconds = epochDay * 86400
                    + hour * 3600
                    + minute * 60
                    + second;
        }

        int zoneOffsetTotalSeconds;

        if (zoneId == null) {
            zoneId = DEFAULT_ZONE_ID;
        }
        boolean shanghai = zoneId == SHANGHAI_ZONE_ID || zoneId.getRules() == SHANGHAI_ZONE_RULES;
        long SECONDS_1991_09_15_02 = 684900000; // utcMillis(1991, 9, 15, 2, 0, 0);
        if (shanghai && utcSeconds >= SECONDS_1991_09_15_02) {
            zoneOffsetTotalSeconds = 28800; // OFFSET_0800_TOTAL_SECONDS
        } else if (zoneId == ZoneOffset.UTC || "UTC".equals(zoneId.getId())) {
            zoneOffsetTotalSeconds = 0;
        } else {
            LocalDate localDate = LocalDate.of(year, month, dom);
            LocalTime localTime = LocalTime.of(hour, minute, second, 0);
            LocalDateTime ldt = LocalDateTime.of(localDate, localTime);
            ZoneOffset offset = zoneId.getRules().getOffset(ldt);
            zoneOffsetTotalSeconds = offset.getTotalSeconds();
        }

        return (utcSeconds - zoneOffsetTotalSeconds) * 1000L;
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core/src/main/java/com/alibaba/fastjson2/util/DateUtils.java [6987:7294]:
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        char y0, y1, y2, y3, m0, m1, d0, d1, h0, h1, i0, i1, s0, s1;
        if (c4 == '-' && c7 == '-' && (c10 == ' ' || c10 == 'T') && c13 == ':' && c16 == ':') {
            // yyyy-MM-dd HH:mm:ss
            // yyyy-MM-dd'T'HH:mm:ss
            y0 = c0;
            y1 = c1;
            y2 = c2;
            y3 = c3;

            m0 = c5;
            m1 = c6;

            d0 = c8;
            d1 = c9;

            h0 = c11;
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c4 == '/' && c7 == '/' && (c10 == ' ' || c10 == 'T') && c13 == ':' && c16 == ':') {
            // yyyy/MM/dd HH:mm:ss
            // yyyy/MM/dd'T'HH:mm:ss
            y0 = c0;
            y1 = c1;
            y2 = c2;
            y3 = c3;

            m0 = c5;
            m1 = c6;

            d0 = c8;
            d1 = c9;

            h0 = c11;
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (((c2 == '/' && c5 == '/') || (c2 == '-' && c5 == '-') || (c2 == '.' && c5 == '.'))
                && c10 == ' '
                && c13 == ':' && c16 == ':') {
            // dd/MM/yyyy HH:mm:ss
            // dd-MM-yyyy HH:mm:ss
            // dd.MM.yyyy HH:mm:ss
            d0 = c0;
            d1 = c1;

            m0 = c3;
            m1 = c4;

            y0 = c6;
            y1 = c7;
            y2 = c8;
            y3 = c9;

            h0 = c11;
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c1 == ' ' && c5 == ' ' && c10 == ' ' && c13 == ':' && c16 == ':') {
            // d MMM yyyy HH:mm:ss
            // 6 DEC 2020 12:13:14
            d0 = '0';
            d1 = c0;

            int month = DateUtils.month(c2, c3, c4);
            if (month > 0) {
                m0 = (char) ('0' + month / 10);
                m1 = (char) ('0' + (month % 10));
            } else {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }

            y0 = c6;
            y1 = c7;
            y2 = c8;
            y3 = c9;

            h0 = c11;
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c2 == ' ' && c6 == ' ' && c11 == ' ' && c13 == ':' && c16 == ':') {
            // dd MMM yyyy H:mm:ss
            // 16 DEC 2020 2:13:14
            d0 = c0;
            d1 = c1;

            int month = DateUtils.month(c3, c4, c5);
            if (month > 0) {
                m0 = (char) ('0' + month / 10);
                m1 = (char) ('0' + (month % 10));
            } else {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }

            y0 = c7;
            y1 = c8;
            y2 = c9;
            y3 = c10;

            h0 = '0';
            h1 = c12;

            i0 = c14;
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c2 == ' ' && c6 == ' ' && c11 == ' ' && c14 == ':' && c16 == ':') {
            // dd MMM yyyy HH:m:ss
            // 16 DEC 2020 12:3:14
            d0 = c0;
            d1 = c1;

            int month = DateUtils.month(c3, c4, c5);
            if (month > 0) {
                m0 = (char) ('0' + month / 10);
                m1 = (char) ('0' + (month % 10));
            } else {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }

            y0 = c7;
            y1 = c8;
            y2 = c9;
            y3 = c10;

            h0 = c12;
            h1 = c13;

            i0 = '0';
            i1 = c15;

            s0 = c17;
            s1 = c18;
        } else if (c2 == ' ' && c6 == ' ' && c11 == ' ' && c14 == ':' && c17 == ':') {
            // dd MMM yyyy HH:m:ss
            // 16 DEC 2020 12:3:14
            d0 = c0;
            d1 = c1;

            int month = DateUtils.month(c3, c4, c5);
            if (month > 0) {
                m0 = (char) ('0' + month / 10);
                m1 = (char) ('0' + (month % 10));
            } else {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }

            y0 = c7;
            y1 = c8;
            y2 = c9;
            y3 = c10;

            h0 = c12;
            h1 = c13;

            i0 = c15;
            i1 = c16;

            s0 = '0';
            s1 = c18;
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int year;
        if (y0 >= '0' && y0 <= '9'
                && y1 >= '0' && y1 <= '9'
                && y2 >= '0' && y2 <= '9'
                && y3 >= '0' && y3 <= '9'
        ) {
            year = (y0 - '0') * 1000 + (y1 - '0') * 100 + (y2 - '0') * 10 + (y3 - '0');
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int month;
        if (m0 >= '0' && m0 <= '9'
                && m1 >= '0' && m1 <= '9'
        ) {
            month = (m0 - '0') * 10 + (m1 - '0');

            if ((month == 0 && year != 0) || month > 12) {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int dom;
        if (d0 >= '0' && d0 <= '9'
                && d1 >= '0' && d1 <= '9'
        ) {
            dom = (d0 - '0') * 10 + (d1 - '0');

            int max = 31;
            switch (month) {
                case 2:
                    boolean leapYear = (year & 3) == 0 && ((year % 100) != 0 || (year % 400) == 0);
                    max = leapYear ? 29 : 28;
                    break;
                case 4:
                case 6:
                case 9:
                case 11:
                    max = 30;
                    break;
            }

            if ((dom == 0 && year != 0) || dom > max) {
                String str = new String(bytes, off, 19);
                throw new DateTimeParseException("illegal input " + str, str, 0);
            }
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int hour;
        if (h0 >= '0' && h0 <= '9'
                && h1 >= '0' && h1 <= '9'
        ) {
            hour = (h0 - '0') * 10 + (h1 - '0');
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int minute;
        if (i0 >= '0' && i0 <= '9'
                && i1 >= '0' && i1 <= '9'
        ) {
            minute = (i0 - '0') * 10 + (i1 - '0');
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        int second;
        if (s0 >= '0' && s0 <= '9'
                && s1 >= '0' && s1 <= '9'
        ) {
            second = (s0 - '0') * 10 + (s1 - '0');
        } else {
            String str = new String(bytes, off, 19);
            throw new DateTimeParseException("illegal input " + str, str, 0);
        }

        if (year == 0 && month == 0 && dom == 0) {
            year = 1970;
            month = 1;
            dom = 1;
        }

        long utcSeconds;
        {
            long epochDay = calcEpochDay(year, month, dom);
            utcSeconds = epochDay * 86400
                    + hour * 3600
                    + minute * 60
                    + second;
        }

        int zoneOffsetTotalSeconds;

        if (zoneId == null) {
            zoneId = DEFAULT_ZONE_ID;
        }
        boolean shanghai = zoneId == SHANGHAI_ZONE_ID || zoneId.getRules() == SHANGHAI_ZONE_RULES;
        long SECONDS_1991_09_15_02 = 684900000; // utcMillis(1991, 9, 15, 2, 0, 0);
        if (shanghai && utcSeconds >= SECONDS_1991_09_15_02) {
            zoneOffsetTotalSeconds = 28800; // OFFSET_0800_TOTAL_SECONDS
        } else if (zoneId == ZoneOffset.UTC || "UTC".equals(zoneId.getId())) {
            zoneOffsetTotalSeconds = 0;
        } else {
            LocalDate localDate = LocalDate.of(year, month, dom);
            LocalTime localTime = LocalTime.of(hour, minute, second, 0);
            LocalDateTime ldt = LocalDateTime.of(localDate, localTime);
            ZoneOffset offset = zoneId.getRules().getOffset(ldt);
            zoneOffsetTotalSeconds = offset.getTotalSeconds();
        }

        return (utcSeconds - zoneOffsetTotalSeconds) * 1000L;
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