如何将string转换为datetime

Posted 2023-03-23

java代码：

String strDate  = "2017-03-27T13:11:50.657";

strDate = strDate.replaceAll("T", " ");

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");

Date dateTime;

try

dateTime = formatter.parse(strDate);

System.out.println(formatter.format(dateTime));

catch (ParseException e)

// TODO Auto-generated catch block

e.printStackTrace();

资料拓展：

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参考技术A (1) Date转换为Datetime Datetime在java数据库中对应的是Timestamp，转换如下： [java] view plaincopyprint? //java.util.Date转换为Timestamp Date date = new Date(); Timestamp timestamp = new 参考技术B (1)
Date转换为Datetime

Datetime在java数据库中对应的是Timestamp，转换如下：

[java] view
plaincopyprint?

//java.util.Date转换为Timestamp

Date date = new Date();

Timestamp timestamp = new Timestamp(date.getTime()); //2013-01-14 22:45:36.484
//java.util.Date转换为Timestamp
Date date = new Date();
Timestamp timestamp = new Timestamp(date.getTime()); //2013-01-14 22:45:36.484

(2) String转换为Date

[java] view
plaincopyprint?

//String转换为java.util.Date

String str = "2013-01-14";

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

Date date = null; //初始化date

try

date = sdf.parse(str); //Mon Jan 14 00:00:00 CST 2013

catch (ParseException e)

e.printStackTrace();


//String转换为java.util.Date
String str = "2013-01-14";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = null; //初始化date
try
date = sdf.parse(str); //Mon Jan 14 00:00:00 CST 2013
catch (ParseException e)
e.printStackTrace();


(3)
Date转换为String

[java] view
plaincopyprint?

//java.util.Date转换为String

Date date = new Date();

DateFormat format = new SimpleDateFormat("yyyy-MM-dd");

String str = format.format(date); //2013-01-14
//java.util.Date转换为String
Date date = new Date();
DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
String str = format.format(date); //2013-01-14

(4)
String转化为java.sql.Date

转换为java.sql.Date目的是要对数据库进行操作

[java] view
plaincopyprint?

//String转换为java.sql.Date

String str = "2013-01-14";

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

java.sql.Date sdate = null; //初始化

try

java.util.Date udate = sdf.parse(str);

sdate = new java.sql.Date(udate.getTime()); //2013-01-14

catch (ParseException e)

e.printStackTrace();

本回答被提问者采纳

如何将string 类型字段转换为datetime类型字段

string time = Convert。ToDateTime(this.Birthday.Text);是否转化正确，为什么这样写？

DateTime time = new DateTime();
if (!DateTime.TyrParse(this.Birthday.Text, out time))

throw new Exception("无法转换日期！");

//time就是this.Birthday.Text字符转换成的日期类数据 参考技术A DateTime time = Convert.ToDateTime(this.Birthday.Text); 参考技术B 错了吧
DateTime time = Convert.ToDateTime(this.Birthday.Text);
Birthday是什么？textBox? 参考技术C this.Birthday.Text=Convent.ToString(time);
DateTime time = Convert.ToDateTime(this.Birthday.Text);
convent.ToDateTime()是转换日期格式的。
convent.ToString()是转换字符串格式