如何把字符串转换成datetime类型

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：

Java是一门面向对象编程语言，不仅吸收了C++语言的各种优点，还摒弃了C++里难以理解的多继承、指针等概念，因此Java语言具有功能强大和简单易用两个特征。Java语言作为静态面向对象编程语言的代表，极好地实现了面向对象理论

(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("-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("-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("-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("-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 *** 作

[java] view

plaincopyprint?

//String转换为java.sql.Date

String str = "2013-01-14"

SimpleDateFormat sdf = new SimpleDateFormat("-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()

}

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