How to Map Dates with Hibernate – Use joda-time
This is always a question – how to map temporal data in our hibernate entities – whether to use java.util.Date, java.util.Calendar or simply long. The correct answer is: neither of these. Use joda-time – the de-facto Java datetime API. Using it throughout the whole project is a no-brainer, but how to use it with hibernate – you can’t use @Temporal. Hibernate supports custom types, so there’s a solution:
- for hibernate 4 use: usertypes
- for hibernate 3 use joda-time – hibernate support.
The user guide is pretty clear:
@Column
@Type(type="........PersistentDateTime")
private DateTime fromDate;
However, there’s might be issues with these libraries when hibernate version change. For that reason you may need to extend the PersistentDateTime class and use your own class in the @Tpe mapping.
Using joda-time throughout the whole project will save tons of headaches. So I strongly suggest the above mechanism to use joda-time in your hibernate entities as well.
This is always a question – how to map temporal data in our hibernate entities – whether to use java.util.Date, java.util.Calendar or simply long. The correct answer is: neither of these. Use joda-time – the de-facto Java datetime API. Using it throughout the whole project is a no-brainer, but how to use it with hibernate – you can’t use @Temporal. Hibernate supports custom types, so there’s a solution:
- for hibernate 4 use: usertypes
- for hibernate 3 use joda-time – hibernate support.
The user guide is pretty clear:
@Column @Type(type="........PersistentDateTime") private DateTime fromDate;
However, there’s might be issues with these libraries when hibernate version change. For that reason you may need to extend the PersistentDateTime class and use your own class in the @Tpe mapping.
Using joda-time throughout the whole project will save tons of headaches. So I strongly suggest the above mechanism to use joda-time in your hibernate entities as well.
Hello
It is posible to define this type into xml config or something like properties ?
You can define that a field is of that type (http://learningviacode.blogspot.com/2011/09/creating-hibernate-custom-type-4.html), but you need to have the java class on the classpath to use it.
@Entity
@Table(name = “cm_cash_master”)
public class Cash {
private DateTime cm_date;
@Column(name = “CM_DATE”)
@Type(type = “org.joda.time.contrib.hibernate.PersistentDateTime”)
public DateTime getCm_date() {
return cm_date;
}
public void setCm_date(DateTime cm_date) {
this.cm_date = cm_date;
}
@Transient
public String getCashDateString() {
String birthDateString = “”;
if (cm_date != null)
birthDateString = org.joda.time.format.DateTimeFormat.forPattern(“yyyy-MM-dd”).print(cm_date);
return birthDateString;
}
}
when i run this code .i found following error during runtime
org.hibernate.MappingException: Could not determine type for: org.joda.time.contrib.hibernate.PersistentDateTime, at table: cm_cash_master, for columns: [org.hibernate.mapping.Column(CM_DATE)]