com.vip.vjtools.vjkit.time

Class CachingDateFormatter

java.lang.Object

com.vip.vjtools.vjkit.time.CachingDateFormatter

public class CachingDateFormatter
extends Object

DateFormat.format()消耗较大，如果时间戳是递增的，而且同一单位内有多次format()，使用用本类减少重复调用. copy from Log4j2 DatePatternConverter，进行了优化，根据输出格式是否毫秒级，决定缓存在秒级还是毫秒级. 注意如果输出格式为毫秒级的话，根据QPS决定性价比 see https://github.com/apache/logging-log4j2/blob/master/log4j-core/src/main/java/org/apache/logging/log4j/core/pattern/DatePatternConverter.java#L272

Author:

calvin

Constructor Summary

Constructors

Constructor and Description
CachingDateFormatter(org.apache.commons.lang3.time.FastDateFormat fastDateFormat)
CachingDateFormatter(String pattern)

Method Summary

Methods

Modifier and Type	Method and Description
String	format(long timestampMillis)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CachingDateFormatter

public CachingDateFormatter(String pattern)

CachingDateFormatter

public CachingDateFormatter(org.apache.commons.lang3.time.FastDateFormat fastDateFormat)

Method Detail

format

public String format(long timestampMillis)