Backup and restore sqlite from disk to memory in Java
It looks like you are missing two things: 1) The quotes around the file name, and 2) stat.close. Try the following:
this._conn = DriverManager.getConnection("jdbc:sqlite:");Statement stat = this._conn.createStatement();File dbFile = new File(this._config.GetDataBaseFile());if (dbFile.exists()) { this._logger.AddInfo("File exists."); stat.executeUpdate("restore from '" + dbFile.getAbsolutePath() + "'"); stat.close();}That was the only way I could get it to work with Xerial SQLite JDBC version 3.7.15-M1. I do not think that the version matters much in this case.
The quotes and stat.close() don't matter, according to the link: `https://bitbucket.org/xerial/sqlite-jdbc/wiki/Usage', which I have tested. Quotes help when file path contains spaces, though.
I think it maybe due to the jdbc driver. Try Xerial's JDBC driver for SQLite, which works fine for me.