[Java SE] Three types of data conversion of string, timestamp, and Date

Three types of data conversion of string, timestamp, and Date in Java

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• 时间戳Convert to字符串

// 时间戳 --> 字符串
String times = "18461145832";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm");
String time = sdf.format(Long.parseLong(times));
System.out.println(time);

1970/08/03 00:05

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• 字符串Type conversion toDate类型

// str --> data
String str = "12/29/2000 0:36";
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy H:mm");
Date date = sdf.parse(str);
System.out.println(date);

Fri Dec 29 00:36:00 CST 2000

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• Date类型转Replace with字符串

// data -->str
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm");
String time = sdf.format(date);
System.out.println(time);

2021/03/15 18:05

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• Date类型转Convert to时间戳

// date --> 时间戳
Date date = new Date();
long l = date.getTime();
System.out.println(l);

1615802721784

Reference: Three types of conversion of string, timestamp, and Date in Java

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