Java时间戳处理技巧与最佳实践

java 时间戳 timestamp

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相关类

Timestamp

public class Timestamp extends java.util.Date {********************************
构造函数public Timestamp(long time)*********************************
常用方法public void setTime(long time)//设置自1970开始的时间毫秒数
public long getTime()//返回自1970开始的毫秒数public static Timestamp valueOf(String s) //将字符串转换为时间戳，字符串格式yyyy-[m]m-[d]d hh:mm:ss[.f...]public static Timestamp from(Instant instant)//从Instant中提取时间戳
public Instant toInstant()//将时间戳转换为Instantpublic void setTime(long time)//设置自1970开始的毫秒数
public long getTime()//返回自1970开始的毫秒数public void setNanos(int n)//设置纳秒数
public int getNanos()//获得纳秒数public boolean before(Timestamp ts)
public boolean after(Timestamp ts)
public boolean equals(java.lang.Object ts)//比较先后顺序，是否相等


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示例

public class TimeTest {public static void main(String[] args){long l=System.currentTimeMillis();Timestamp timestamp=new Timestamp(l);System.out.println(l);System.out.println(timestamp);System.out.println(timestamp.getNanos());System.out.println(timestamp.getTime());System.out.println(timestamp.toInstant());System.out.println();System.out.println("*********************************");Instant instant=timestamp.toInstant();System.out.println(instant);Timestamp t1=Timestamp.from(instant);System.out.println(t1);System.out.println();System.out.println("**********************************");Instant instant2=Instant.now();System.out.println(instant2);Timestamp timestamp2=Timestamp.from(instant2);System.out.println(timestamp2);}
}

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控制台输出

1568768671589
2019-09-18 09:04:31.589
589000000
1568768671589
2019-09-18T01:04:31.589Z*********************************
2019-09-18T01:04:31.589Z
2019-09-18 09:04:31.589**********************************
2019-09-18T01:04:31.611454900Z
2019-09-18 09:04:31.6114549