i ve got 2 table:
Seat(roomID,seatID,...) SeatState(roomID,seatID,date,state)
i 大麻产生一个席位类别,希望这一类别具有地图特征。 有些人知道如何描绘这一东西?
Hibernate supports using Map s as collections. If you are using hbm.xml files, you can use the <map> tag for this purpose. Take a look at http://docs.jboss.org/hibernate/core/3.3/reference/en/html/collections.html for a reference. Also Hibernate supports mapping Calendar fields to TIMESTAMP fields.
So if you are using XML, it should be something like
<map name="booking" table="BOOKING">
<key column="BOOKING_ID"/>
<map-key column="BOOKING_DATE" type="calendar"/>
<element column="IS_BOOKED" type="boolean"/>
</map>
同样,也存在JPA/Hibernate Annotation替代品。 你们需要使用@Embeddable来做到这一点。 见http://hwellmann.blogspot.com/2010/07/jpa-20-mapping-map.html“rel=”http://hwellmann.blogspot.com/2010/07/jpa-20-mapping-map.html。 例如。
Hi have this j2ee web application developed using spring framework. I have a problem with rendering mnessages in nihongo characters from the properties file. I tried converting the file to ascii using ...
Check this, List<String> list = new ArrayList<String>(); for (int i = 0; i < 10000; i++) { String value = (""+UUID.randomUUID().getLeastSignificantBits()).substring(3, ...
I am in the middle of solving a problem where I think it s best suited for a decorator and a state pattern. The high level setting is something like a sandwich maker and dispenser, where I have a set ...
I have been trying to execute a MS SQL Server stored procedure via JDBC today and have been unsuccessful thus far. The stored procedure has 1 input and 1 output parameter. With every combination I ...
I have a system which contains multiple applications connected together using JMS and Spring Integration. Messages get sent along a chain of applications. [App A] -> [App B] -> [App C] We set a ...
If I m given two Java Libraries in Jar format, 1 having no bells and whistles, and the other having lots of them that will mostly go unused.... my question is: How will the larger, mostly unused ...
I have a Class variable that holds a certain type and I need to get a variable that holds the corresponding array class. The best I could come up with is this: Class arrayOfFooClass = java.lang....
I m working on a Java desktop application that reads and writes from/to different files. I think a better solution would be to replace the file system by a SQLite database. How hard is it to migrate ...