SimpleDateFormat 上午/下午 变 AM/PM

1.

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class T {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int hour = 12;
        try{
            SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");
            SimpleDateFormat formatTime = new SimpleDateFormat("MM/dd/yyyy hh:mm aa",Locale.ENGLISH);
            SimpleDateFormat formatTimea = new SimpleDateFormat("MM/dd/yyyy HH:mm");
            String pickUpTime=format.format(new Date());
            String pickUpDateTime = pickUpTime+" "+hour+":00";
            Date date = formatTimea.parse(pickUpDateTime);
            System.out.println("a: "+formatTime.format(date));
            
        }
        catch(Exception e){
            e.printStackTrace();
        }
    }

 

2.

private static final SimpleDateFormat formatTimeAA = new SimpleDateFormat("MM/dd/yyyy hh:mm aa",Locale.ENGLISH);


    public Date getDate(String time,int hour) throws ParseException {
        String AA = " AM";
        if(hour>11){
            AA = " PM";
            if(hour>12){
                hour = hour -12;
            }
        }
        
        String pickUpDateTime = time+" "+hour+":00";

        pickUpDateTime = pickUpDateTime + AA;
        Date date = formatTimeAA.parse(pickUpDateTime);
        return date;
    }