public static void start(Class<? extends JFinalConfig> configClass) throws Exception {
if (configStarted) {
return;
}
Class<JFinal> clazz = JFinal.class;
JFinal me = JFinal.me();
configInstance = configClass.newInstance();
initConfig(clazz, me, servletContext, configInstance);
handler = Reflect.on(me).get("handler");
configStarted = true;
configInstance.afterJFinalStart();