String Date Calendar之间的转换

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转载最新推荐文章于 2026-07-30 10:23:27 发布 1.7k 阅读 AI 写同款· GEO 优化 ›

String转Date类型或者Calendar类型在String类型转Date类型或者Calendar类型时，如果String的日期格式不对，在转换过程中不会报错。例如：String类型的时间是：2019-02-29 String str3 = "2019-02-29"; Date date3 = simple.parse(str3); //Date类型输出：2019-03-01 String ... 阅读详情

1.Calendar 转化 String
Calendar calendat = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(“yyyy-MM-dd”);
String dateStr = sdf.format(calendar.getTime());

2.String 转化Calendar
String str=”2012-5-27”;
SimpleDateFormat sdf= new SimpleDateFormat(“yyyy-MM-dd”);
Date date =sdf.parse(str);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);

3.Date 转化String
SimpleDateFormat sdf= new SimpleDateFormat(“yyyy-MM-dd”);
String dateStr=sdf.format(new Date());

4.String 转化Date
String str=”2012-5-27”;
SimpleDateFormat sdf= new SimpleDateFormat(“yyyy-MM-dd”);
Date date= sdf.parse(str);

5.Date 转化Calendar
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Java.util.Date());

6.Calendar转化Date
Calendar calendar = Calendar.getInstance();
java.util.Date date =calendar.getTime();

7.String 转成 Timestamp
Timestamp ts = Timestamp.valueOf(“2012-1-14 08:11:00”);

8.Date 转 TimeStamp
SimpleDateFormat df = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”);
String time = df.format(new Date());
Timestamp ts = Timestamp.valueOf(time);

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