多谢回复！
MaiModule:
package net.wendal.nutzbook;

import org.nutz.mvc.annotation.IocBy;
import org.nutz.mvc.annotation.Modules;
import org.nutz.mvc.annotation.SetupBy;
import org.nutz.mvc.ioc.provider.ComboIocProvider;

@SetupBy(value=MainSetup.class)
@IocBy(type=ComboIocProvider.class,
args={
"*js","ioc/","anno","net.wendal.nutzbook","*tx"
})

@Modules(scanPackage=true)
public class MainModule {

}

UserModule:
package net.wendal.nutzbook.module;

import net.wendal.nutzbook.bean.User;

import org.nutz.dao.Dao;
import org.nutz.ioc.loader.annotation.Inject;
import org.nutz.ioc.loader.annotation.IocBean;
import org.nutz.mvc.annotation.At;
import org.nutz.mvc.annotation.Fail;
import org.nutz.mvc.annotation.Ok;

@IocBean
@At("/user")
@Ok("json")
@Fail("http:500")
public class UserModule {

@Inject
protected Dao dao;

@At
public int count() {
    return dao.count(User.class);
}

}

麻烦看下什么问题，多谢！

哦，多谢，太粗心了，哈哈