Question

在JAVA中如何将String转换成Datetime类型

Answer 1

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

Answer 2

(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();

}

Answer 3

你说的Datetime应该是数据库中的吧?
Datetime在java类中对应的是Timestamp ,用下面的方法转成Timestamp 就可以往数据库中茶了,但是string的时间格式要符合我写的那种

String s = "2008-06-13 09:25:12";
Timestamp time = Timestamp.valueOf(s);
System.out.println(time);

Answer 4

(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();
}

Answer 5

好似没有可以直接利用的函数，自己编一个函数吧，可以分析其中的某些字符串，然后根据字符串内容赋值给时间。