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This article mainly explains the "JAVA snowflake algorithm to generate a unique order number tool class method", the content of the article is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "JAVA snowflake algorithm to generate a unique order number tool class method" bar!

Import lombok.SneakyThrows;import lombok.extern.slf4j.Slf4j;import java.util.Calendar;/** * Default distributed primary key generator. * *

* Use snowflake algorithm. Length is 64 bit. *

* 1bit sign bit. * 41bits timestamp offset from November 01, 2016 (ShardingSphere distributed primary key published data) to now. * 10bits worker process id. * 12bits auto increment offset in one mills *

* Call @ {@ code DefaultKeyGenerator.setWorkerId} to set worker id, default value is 0. *

* *

* Call @ {@ code DefaultKeyGenerator.setMaxTolerateTimeDifferenceMilliseconds} to set max tolerate time difference milliseconds, default value is 0. *

* * @ author gaohongtao * / @ Slf4jpublic final class SnowflakeKeyGenerator {public static final long EPOCH; private static final long SEQUENCE_BITS = 12L; private static final long WORKER_ID_BITS = 10L; private static final long SEQUENCE_MASK = (1

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