要分别获取时间部分，请使用日期时间字段。
要获取日期，请使用以下字段。
Calendar.YEAR Calendar.MONTH Calendar.DATE
要获取时间，请使用以下字段。
Calendar.HOUR_OF_DAY Calendar.HOUR Calendar.MINUTE Calendar.SECOND Calendar.MILLISECOND
以下是一个示例。
import java.util.Calendar;
public class Demo {
public static void main(String[] args) {
Calendar cal = Calendar.getInstance();
//当前日期和时间
System.out.println(cal.getTime().toString());
//日期信息
System.out.println("\nDate Information..........");
System.out.println("Year = " + cal.get(Calendar.YEAR));
System.out.println("Month = " + (cal.get(Calendar.MONTH) + 1));
System.out.println("Date = " + cal.get(Calendar.DATE));
//时间信息
System.out.println("\nTime Information..........");
System.out.println("Hour (24 hour format) : " + cal.get(Calendar.HOUR_OF_DAY));
System.out.println("Hour (12 hour format) : " + cal.get(Calendar.HOUR));
System.out.println("Minute : " + cal.get(Calendar.MINUTE));
System.out.println("Second : " + cal.get(Calendar.SECOND));
System.out.println("Millisecond : " + cal.get(Calendar.MILLISECOND));
}
}输出结果
Mon Nov 19 14:46:29 UTC 2018 Date Information.......... Year = 2018 Month = 11 Date = 19 Time Information.......... Hour (24 hour format) : 14 Hour (12 hour format) : 2 Minute : 46 Second : 29 Millisecond : 762