js 文件

var ioc = {
	conf : {
		type : "org.nutz.ioc.impl.PropertiesProxy",
		fields : {
			paths : [ "custom/" ]
		}
	},
	zMongo : {
		args : [ {
			java : "$conf.get('mongo.host')"
		}, {
			java : "$conf.getInt('mongo.port')"
		} ],
		factory : "org.nutz.mongo.ZMongo#me"
	},
	zMoDB : {
		args : [ {
			java : "$conf.get('mongo.db')"
		} ],
		factory : "$zMongo#db"
	}
};

实在没看出是哪里的问题
启动报错

Exception in thread "main" org.nutz.ioc.IocException: IocBean[zMoDB -> zMongo] For object [zMongo] - type:[]
	at org.nutz.ioc.impl.NutIoc.get(NutIoc.java:218)
	at org.nutz.ioc.impl.NutIoc.get(NutIoc.java:239)
	at org.nutz.ioc.impl.ObjectMakerImpl$1.born(ObjectMakerImpl.java:88)
	at org.nutz.ioc.weaver.DefaultWeaver.born(DefaultWeaver.java:67)
	at org.nutz.ioc.impl.ObjectMakerImpl.make(ObjectMakerImpl.java:114)
	at org.nutz.ioc.impl.NutIoc.get(NutIoc.java:210)
	at org.nutz.ioc.impl.NutIoc.get(NutIoc.java:239)
	at org.nutz.ioc.impl.NutIoc.get(NutIoc.java:146)
	at com.anawin.tools.IocProvider.me(IocProvider.java:50)
	at com.anawin.tools.IocProvider.main(IocProvider.java:82)
Caused by: java.lang.NullPointerException
	at java.lang.Class.isAssignableFrom(Native Method)
	at org.nutz.ioc.aop.impl.DefaultMirrorFactory.getMirror(DefaultMirrorFactory.java:49)
	at org.nutz.ioc.impl.ObjectMakerImpl.make(ObjectMakerImpl.java:36)
	at org.nutz.ioc.impl.NutIoc.get(NutIoc.java:210)
	... 9 more