tmpFilePool : {
		type : 'org.nutz.filepool.NutFilePool', // 临时文件最大个数为 1000 个
		args : [ {
			app : '${app.root}/WEB-INF/tmp/'
		}, 1000 ]
	}

配置路径用这个获取不到

app : '${app.root}/WEB-INF/tmp/'

Caused by: org.nutz.ioc.IocException: Fail to born 'org.nutz.filepool.NutFilePool'
 by args: [
  @(null)
  @(1000)] becasue:
java.lang.NullPointerException FAIL to create Ioc Bean name=[tmpFilePool] FAIL to create Ioc Bean name=[uploadFileContext]
	at org.nutz.ioc.impl.ObjectMakerImpl.make(ObjectMakerImpl.java:144)
	at org.nutz.ioc.impl.NutIoc.get(NutIoc.java:200)
	at org.nutz.ioc.val.ReferValue.get(ReferValue.java:24)
	at org.nutz.ioc.impl.ObjectMakerImpl.make(ObjectMakerImpl.java:73)
	... 26 more