import i5.las2peer.api.Service; //导入依赖的package包/类
public SQLDatabaseManager(Service service, SQLDatabase storageDatabase) {
	this.storageDatabase = storageDatabase;
	// get the user's security object which contains the database
	// information

	initializeUser();

	SQLDatabaseSettings[] settings = null;

	try {
		Connection c = storageDatabase.getConnection();
		PreparedStatement p = c.prepareStatement("SELECT * FROM DATABASE_CONNECTIONS WHERE USER = ?;");
		p.setString(1, Context.get().getMainAgent().getIdentifier());
		ResultSet databases = p.executeQuery();
		settings = SQLDatabaseSettings.fromResultSet(databases);
		c.close();
	} catch (Exception e) {
		logMessage("Failed to get the users' SQL settings. " + e.getMessage());
	}

	for (SQLDatabaseSettings setting : settings) {
		userDatabaseMap.put(setting.getKey(), setting);
	}
}