FastDateFormat 解析 WeekYear 结果与预期不符

[dasoops]

版本情况

JDK版本：

java version "17.0.3.1" 2022-04-22 LTS
Java(TM) SE Runtime Environment (build 17.0.3.1+2-LTS-6)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.3.1+2-LTS-6, mixed mode, sharing)

hutool版本： 5.8.27（请确保最新尝试是否还有问题）

问题描述（包括截图）

0. 复现代码

<!-- pom.xml -->
<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.8.27</version>
</dependency>

import cn.hutool.core.date.DateUtil;
import cn.hutool.core.date.format.FastDateFormat;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

import java.text.SimpleDateFormat;
import java.util.TimeZone;

public class FastDateFormatTest {
    private static final TimeZone timezone = TimeZone.getTimeZone("Etc/Utc");

    private static FastDateFormat getHutoolInstance(String pattern) {
        return FastDateFormat.getInstance(pattern, timezone);
    }

    @Test
    public void test() {
        var date = DateUtil.date(0L);

        Assertions.assertEquals(
                getHutoolInstance("yyyy-MM-dd HH:mm:ss").format(date),
                "1970-01-01 00:00:00"
        );

        Assertions.assertEquals(
                getHutoolInstance("YYYY-MM-dd HH:mm:ss").format(date),
                "1970-01-01 00:00:00"
        );

        Assertions.assertEquals(
                getHutoolInstance("YYYY").format(date),
                "1970"
        );

        Assertions.assertEquals(
                getHutoolInstance("yy").format(date),
                "70"
        );

        Assertions.assertEquals(
                new SimpleDateFormat("YY").format(date),
                "70"
        );

        // org.opentest4j.AssertionFailedError:
        // Expected :õ0
        // Actual   :70
        Assertions.assertEquals(
                getHutoolInstance("YY").format(date),
                "70"
        );
    }
}

0. 测试涉及到的文件（注意脱密） WeekYear直接调用TwoDigitYearField.appendTo(Appendable, int), 没有经过TwoDigitYearField.appendTo(Appendable, Calendar)850行的取余操作 https://github.com/dromara/hutool/blob/38592915eb1e599fdd9a2ba66881b19dcdff7ee6/hutool-core/src/main/java/cn/hutool/core/date/format/FastDatePrinter.java#L1039-L1042 https://github.com/dromara/hutool/blob/38592915eb1e599fdd9a2ba66881b19dcdff7ee6/hutool-core/src/main/java/cn/hutool/core/date/format/FastDatePrinter.java#L845-L859

[looly]

感谢给出详细的说明

5.8.29修复此问题~~