实体类加了有参构造方法后出错，报错信息

四月 24, 2017 3:08:59 下午 org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter nutz
org.nutz.mvc.LoadingException: org.nutz.lang.born.BorningException: Fail to born 'com.ttsx.cpxt.domain.system.Unit'
 by args: []
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)