从dateTime字符串中获取时间

import datetime

dateTimeStr = "2022-07-01 15:30:45"
dateTimeObj = datetime.datetime.strptime(dateTimeStr, "%Y-%m-%d %H:%M:%S")
time = dateTimeObj.time()

print("时间：", time.hour, ":", time.minute, ":", time.second)

var dateTimeStr = "2022-07-01 15:30:45";
var dateTimeObj = new Date(dateTimeStr);
var time = dateTimeObj.toTimeString().split(' ')[0];

console.log("时间：" + time);

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

String dateTimeStr = "2022-07-01 15:30:45";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
LocalDateTime dateTimeObj = LocalDateTime.parse(dateTimeStr, formatter);
int hour = dateTimeObj.getHour();
int minute = dateTimeObj.getMinute();
int second = dateTimeObj.getSecond();

System.out.println("时间：" + hour + ":" + minute + ":" + second);