Java Data Type - 如何从日历获取今天的日期并排除时间部分

import java.util.Calendar;
import static java.util.Calendar.HOUR_OF_DAY;
import static java.util.Calendar.MINUTE;
import static java.util.Calendar.SECOND;
import static java.util.Calendar.MILLISECOND;

public class Today { 
    public static void main( String [] args ) { 
        Calendar cal = Calendar.getInstance();
        cal.set( HOUR_OF_DAY, 0 );
        cal.set( MINUTE, 0 );
        cal.set( SECOND, 0 );
        cal.set( MILLISECOND, 0 );
        System.out.println( cal.getTime() );
    }
}