56、salesforce学习笔记（三）

Date类型
Datetime nowDatetime = Datetime.now();
Datetime datetime1 = Datetime.newInstance(2015,3,1,13,26,0);
String datetimeString = '2016-3-1 PM14:38';

System.debug('通过初始化年月日时分秒得到的Datetime,并转换格式到:'+datetime1.format('yyyy-MM-dd HH:mm:ss'));
System.debug('当前日期时间:' + nowDatetime.format());

datetime1 = datetime1.addDays(1);
datetime1 = datetime1.addMonths(1);
datetime1 = datetime1.addYears(1);
datetime1 = datetime1.addHours(1);
datetime1 = datetime1.addMinutes(1);
datetime1 = datetime1.addSeconds(1);
System.debug('更改后的日期时间:'+datetime1.format('yyyy-MM-dd HH:mm:ss'));
Date date1 = datetime1.date();
System.debug('datetime1对应的Date为:'+date1.format());

Date dateGmt = datetime1.dateGmt();
System.debug('datetime1对应的DateGmt值为:'+dateGmt.format());
Integer year = datetime1.year();
Integer yearGmt = datetime1.yearGmt();
Integer month = datetime1.month();
Integer monthGmt = datetime1.monthGmt();
Integer day = datetime1.day();
Integer dayGmt = datetime1.dayGmt();
Integer dayOfYear = datetime1.dayOfYear();
Integer dayOfYearGmt = datetime1.dayOfYearGmt();
Integer hour = datetime1.hour();
Integer hourGmt = datetime1.hourGmt();
Integer minute = datetime1.minute();
Integer minuteGmt = datetime1.minuteGmt();
Integer second = datetime1.second();
Integer secondGmt = datetime1.secondGmt();
System.debug('year:'+year+'	yearGmt:'+yearGmt);
System.debug('month:'+month+'	monthGmt:'+monthGmt);
System.debug('day:'+day+'	dayGmt:'+dayGmt);
System.debug('hour:'+hour+'	hourGmt:'+hourGmt);
System.debug('minute:'+minute+'	minuteGmt:'+minuteGmt);
System.debug('second:'+second+'	secondGmt:'+secondGmt);
System.debug('dayOfYear:'+dayOfYear+'	dayOfYearGmt:'+dayOfYearGmt);
System.debug('转成本地日期并以长日期类型显示:'+datetime1.formatLong());
Long timeL = datetime1.getTime();
System.debug('转成time类型的Long类型显示为:'+timeL.format());
Datetime datetime5 = Datetime.newInstance(2016, 4 ,2);
System.debug('datetime1与datetime2是否同一天:'+datetime1.isSameDay(datetime5));

结果如下所示

Date类型

Date date2 = Date.today();
System.debug('当前日期:'+date2.format());
Date date3 = Date.newInstance(2016, 3, 1);
String dateString = '2016-3-1';
Date date4 = Date.parse(dateString);
Date date5 = Date.valueOf(dateString);

System.debug('通过newInstance实例化:'+date3.format());
System.debug('通过parse实例化:'+ date4.format());
System.debug('通过valueOf实例化' + date5.format());

date3 = date3.addMonths(1);
date3 = date3.addDays(1);
System.debug('date3的日期为:' + date3.format());
Integer year1 = date3.year();
Integer month1 = date3.month();
Integer day1 = date3.day();
System.debug('year:'+year1);
System.debug('month:'+ month1);
System.debug('day:'+ day1);
Integer dayOfYear1 = date3.dayOfYear();
System.debug('dayOfYear :' + dayOfYear1);

Integer daysBetween = date3.daysBetween(date4);//date4-date3
System.debug('date3和date4相差天数:'+ daysBetween);

System.debug('date4和date5是否相同日期:'+date4.isSameday(date5));

System.debug('date3和date4相差月数:'+date3.monthsBetween(date4));

System.debug('调用toStartOfMonth执行值:'+date3.toStartOfMonth().format());

System.debug('调用toStartOfWeek执行值:' + date3.toStartOfWeek().format());

结果如下所示