How to store Java Date to Mysql datetime with JPA
开发者_如何学运维Can any body tell me how can I store Java Date to Mysql datetime...?
When I am trying to do so...only date is stored and time remain 00:00:00 in Mysql date stores like this...
2009-09-22 00:00:00
I want not only date but also time...like
2009-09-22 08:08:11
I am using JPA(Hibernate) with spring mydomain classes uses java.util.Date but i have created tables using handwritten queries...
this is my create statement
CREATE TABLE ContactUs (
id BIGINT AUTO_INCREMENT,
userName VARCHAR(30),
email VARCHAR(50),
subject VARCHAR(100),
message VARCHAR(1024),
messageType VARCHAR(15),
contactUsTime DATETIME,
PRIMARY KEY(id)
);
see in the link :
http://www.coderanch.com/t/304851/JDBC/java/Java-date-MySQL-date-conversion
The following code just solved the problem:
java.util.Date dt = new java.util.Date();
java.text.SimpleDateFormat sdf =
new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentTime = sdf.format(dt);
This 'currentTime' was inserted into the column whose type was DateTime and it was successful.
Annotate your field (or getter) with @Temporal(TemporalType.TIMESTAMP)
, like this:
public class MyEntity {
...
@Temporal(TemporalType.TIMESTAMP)
private java.util.Date myDate;
...
}
That should do the trick.
Are you perhaps using java.sql.Date
? While that has millisecond granularity as a Java class (it is a subclass of java.util.Date
, bad design decision), it will be interpreted by the JDBC driver as a date without a time component. You have to use java.sql.Timestamp
instead.
Probably because your java date has a different format from mysql format
(YYYY-MM-DD HH:MM:SS
)
do this
DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
System.out.println(dateFormat.format(date));
you will get 2011-07-18 + time format
long timeNow = Calendar.getInstance().getTimeInMillis();
java.sql.Timestamp ts = new java.sql.Timestamp(timeNow);
...
preparedStatement.setTimestamp(TIME_COL_INDEX, ts);
mysql datetime -> GregorianCalendar
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = format.parse("2012-12-13 14:54:30"); // mysql datetime format
GregorianCalendar calendar = new GregorianCalendar();
calendar.setTime(date);
System.out.println(calendar.getTime());
GregorianCalendar -> mysql datetime
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String string = format.format(calendar.getTime());
System.out.println(string);
java.util.Date date = new Date();
Object param = new java.sql.Timestamp(date.getTime());
preparedStatement.setObject(param);
Use the following code to insert the date into MySQL. Instead of changing our date's format to meet MySql's requirement, we can help data base to recognize our date by setting the STR_TO_DATE(?, '%l:%i %p')
parameters.
For example, 2014-03-12 can be represented as STR_TO_DATE('2014-03-12', '%Y-%m-%d')
preparedStatement = connect.prepareStatement("INSERT INTO test.msft VALUES (default, STR_TO_DATE( ?, '%m/%d/%Y'), STR_TO_DATE(?, '%l:%i %p'),?,?,?,?,?)");
Its very simple though conditions in this answer are in mysql the column datatype is datetime and you want to send data from java code to mysql:
java.util.Date dt = new java.util.Date();
whatever your code object may be
.setDateTime(dt);
important thing is just pick the date and its format is already as per mysql format and send it, no further modifications required.
Actually you may not use SimpleDateFormat, you can use something like this;
@JsonSerialize(using=JsonDateSerializer.class)
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "dd/MM/yyyy HH:mm:ss")
private Date blkDate;
This way you can directly get the date with format as specified.
I still prefer the method in one line
new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime())
If using java 8 or higher , try to use LocalDateTime. That was the correct type if you are using DATETIME as mysql data type.
Below is example for conver current time to "2009-09-22 08:08:11" format
LocalDateTime currentTime = LocalDateTime.parse(LocalDateTime.now().toString(), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
it works for me !!
in mysql table
DATETIME
in entity:
private Date startDate;
in process:
objectEntity.setStartDate(new Date());
in preparedStatement:
pstm.setDate(9, new java.sql.Date(objEntity.getStartDate().getTime()));
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