具有本地和在线数据库的桌面应用

Question

I want to create a Desktop App(Software), preferably in Java, which connects to a central MySQL DB on a local network whenever available.

I also want it to store and use a copy of the same DB when the central DB is not available, and sync whenever the central DB is available.

How can I store data locally, I mean which kind of database should I use for local database?

Also, are there any tools which speed up the Desktop App development?

Answer 1

Let's suppose that you will implement your solution in Java. You will need some classes (ie Data Access Obejcts, DAOs) in charge of interacting with the database on the network and on a file based database embedded in the application (the "local" database).

What you need:

1. A local database that you can ship with your application like H2 www.h2database.com, HSQLDB http://hsqldb.org/ or Derby db.apache.org/derby/.
2. To develop your DAOs (using JDBC or Hibernate) in such a way that you can instantiate them with different drivers, URLs, login/pwd and use only SQL standard / functions supported both by MySql and by the local DBMS. In practice you must avoid using DB specific functions.

Answer 2

例如，您可以使用Hibernate或JPA，它们与您的应用程序集成得很好并且很容易。