并发嵌入式Java数据库，可简化应用程序

Question

I am trying to build a simple GUI in which you can write some Integers. These Integers are supposed to be written into a Database, which I am looking for.

So far so good. The data in the Database should then be used for another stand-alone application, which already exists.

I tried it with SQLite already but I received a lot of "Database locked" Errors. I searched Google. The key answer I often read about was to switch to a database which supports concurrent processes.

I went further on and had a look at H2 and HSQLDB. Both of them seem to be legit but much more complicated.

So I wonder:

I would like to have the GUI to be portable in a .jar file (or a folder only) combined with the Database, so when I switch computers I do not have to install the DB in a certain folder like the home-directory or something. With SQLite all you do is this:

Connection con = DriverManager.getConnection("jdbc:sqlite:test.db");

As you can see, no Path-infortmation is necessary. How can I do this with H2 or HSQLDB?

I am really looking forward to your suggestions. But only open source please.

Kindest regards and thank you very much!

Stefan

Answer 1

处理嵌入式数据库文件的创建应该不是什么大问题-但是，如果您真的不喜欢SQLite的话：它应该能够很好地处理并发性以进行基本使用-“数据库锁定”听起来更像是应用程序级问题

Answer 2

With H2 and HSQLDB you can do the same.

With H2, a database URL of the form jdbc:h2:test will create a file called test.h2.db in the current working directory of your application. If this is what you want, then that's fine. Please note I usually don't suggest to do that, because many people run into the problem that they sometimes start the application in a different directory (which will then create a new database). Because of that, I suggest to use jdbc:h2:~/test , which means the database file is stored relative to the current user home directory.