问SqlJet事务误用错误

EN

org.tmatesoft.sqljet.core.SqlJetException: MISUSE: error code is MISUSE

SqlJetDb db = null;

            try {
                File dbFile = new File(Configuration.DATABASE_NAME);

                db = SqlJetDb.open(dbFile, true);
                db.getOptions().setAutovacuum(true);
                db.beginTransaction(SqlJetTransactionMode.READ_ONLY);
                ISqlJetTable table = db.getTable("customers");
                ISqlJetCursor cursor = table.order(table.getPrimaryKeyIndexName());
                if (!cursor.eof()) {
                    do {
                        getInitData(cursor);
                    } while (cursor.next());
                }
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                try {
                    db.commit();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }