问题
Is it possible to use Hibernate and connect to a database with a read only connection? I will be working on a project that will require connecting to an existing database, pulling data from it, and doing some complex data manipulation in the application. Throughout all of this I can`t change anything in the database, hence the read only connection requirement.
My first thought was to pull the data from the database using Hibernate so that I can have ready made Java objects represent the data, however, I can`t seem to find any information on how to force Hibernate to use a read only database connection ... I have a feeling this might actually be impossible, but I want to find out from others before I pursue other ideas.
回答1:
I don't have enough reputation to comment, apparently :(
But responding to your comment about the cases where Hibernate may still write back to the DB, you could manually detach the object from your persistence context, after which Hibernate would cease caring about the state of the object & whether its been modified.
回答2:
You can use: Session.setDefaultReadOnly( true );
http://docs.jboss.org/hibernate/orm/3.5/reference/en-US/html/readonly.html#readonly-api-loaddefault
回答3:
To be bullet-proof safe against anything you do in the application, you need to assign read-only permissions to the DB user that Hibernate is configured to use. This has to be done on the database side. Otherwise, if you rely only on the configuration on the application side, you can always make a mistake (forget to detach the entities, forget to set the session to read-only mode etc.).
来源：https://stackoverflow.com/questions/20980517/read-only-database-connection-with-hibernate