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DateUtil.format(Date date, String format)接口效率优化。

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This commit is contained in:
hellozrh 2024-06-13 14:44:53 +08:00
parent afe34a783d
commit 29a6cba58d
2 changed files with 27 additions and 1 deletions
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2
hutool-core/src/main/java/cn/hutool/core/date/DateUtil.java
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@ -522,7 +522,7 @@ public class DateUtil extends CalendarUtil {
if (date instanceof DateTime) {
timeZone = ((DateTime) date).getTimeZone();
}
return format(date, newSimpleFormat(format, null, timeZone));
return format(date, FastDateFormat.getInstance(format));
}
/**

26
hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java
View File

@ -1183,4 +1183,30 @@ public class DateUtilTest {
final DateTime parse = DateUtil.parse(str);
Assert.assertEquals("2023-12-11 10:42:04", Objects.requireNonNull(parse).toString());
}
@Test
public void formatSpeedTest(){
Date value = new Date();
long t0 = System.currentTimeMillis();
FastDateFormat.getInstance("YYYY-MM-dd HH:mm:ss.SSSSSS");
long t1 = System.currentTimeMillis();
String strTime = null;
for(int i=0; i<5000; i++){
strTime = DateUtil.format(value, "YYYY-MM-dd HH:mm:ss.SSSSSS");
}
System.out.println("format="+strTime);
long t2 = System.currentTimeMillis();
for(int i=0; i<5000; i++){
strTime = FastDateFormat.getInstance("YYYY-MM-dd HH:mm:ss.SSSSSS").format(value);
}
System.out.println("FastDateFormat="+strTime);
long t3 = System.currentTimeMillis();
System.out.println("t1-t0="+(t1-t0));
System.out.println("t2-t1="+(t2-t1));
System.out.println("t3-t2="+(t3-t2));
}
}