大家好：
我使用Nutz来建立实体类和数据表之间的映射关系，下面会贴上代码，我遇到的问题是，我使用查询之后，总是得不到createdTime和updatedTime的值，因为这两个属性和set/get方法都放在父类basePOJO中，我该如何才能获取得到呢？

1. User类
   import java.io.Serializable;
   import java.util.Date;
   import java.util.List;

import org.nutz.dao.entity.annotation.ColDefine;
import org.nutz.dao.entity.annotation.Column;
import org.nutz.dao.entity.annotation.Id;
import org.nutz.dao.entity.annotation.ManyMany;
import org.nutz.dao.entity.annotation.Name;
import org.nutz.dao.entity.annotation.One;
import org.nutz.dao.entity.annotation.Table;

@Table("t_user")
public class User extends BasePojo implements Serializable {

private static final long serialVersionUID = 1L;

@Id
protected int id;
@Name
@Column
protected String name;
@Column("passwd")
@ColDefine(width=128)
protected String password;
@Column
protected String salt;
@Column
protected String email;
@Column
protected String department;
@Column
protected String position;

@Column
protected boolean locked;
@ManyMany(from="u_id", relation="t_user_role", target=Role.class, to="role_id")
protected List<Role> roles;
@ManyMany(from="u_id", relation="t_user_permission", target=Permission.class, to="permission_id")
protected List<Permission> permissions;

public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}
public String getSalt() {
    return salt;
}
public void setSalt(String salt) {
    this.salt = salt;
}
public String getEmail() {
    return email;
}
public void setEmail(String email) {
    this.email = email;
}
public String getDepartment() {
    return department;
}
public void setDepartment(String department) {
    this.department = department;
}
public String getPosition() {
    return position;
}
public void setPosition(String position) {
    this.position = position;
}
public boolean isLocked() {
    return locked;
}
public void setLocked(boolean locked) {
    this.locked = locked;
}
public List<Role> getRoles() {
    return roles;
}
public void setRoles(List<Role> roles) {
    this.roles = roles;
}
public List<Permission> getPermissions() {
    return permissions;
}
public void setPermissions(List<Permission> permissions) {
    this.permissions = permissions;
}

}

1. BasePojo类
   package com.carforu.bean;

import java.io.Serializable;
import java.util.Date;

import org.nutz.dao.entity.annotation.Column;
import org.nutz.dao.entity.annotation.EL;
import org.nutz.dao.entity.annotation.Prev;
import org.nutz.json.Json;
import org.nutz.json.JsonFormat;
import org.nutz.lang.random.R;

/**
* 共享字段,免得每个Pojo类都加创建时间和生成时间
* @author wendal
*
*/
public abstract class BasePojo implements Serializable {

private static final long serialVersionUID = 1L;

@Prev(els=@EL("$me.now()"))
@Column("created_time")
protected Date createdTime;
@Prev(els=@EL("$me.now()"))
@Column("modified_time")
protected Date modifiedTime;

public String toString() {
    return String.format("/*%s*/%s", super.toString(), Json.toJson(this, JsonFormat.compact()));
}

public Date getCreatedTime() {
    return createdTime;
}

public void setCreatedTime(Date createdTime) {
    this.createdTime = createdTime;
}

public Date getModifiedTime() {
    return modifiedTime;
}

public void setModifiedTime(Date modifiedTime) {
    this.modifiedTime = modifiedTime;
}

public Date now() {
    return new Date();
}

public String uuid() {
    return R.UU32().toLowerCase();
}

}

1. 查询
   public List listAll() {
   List list = dao().query(User.class, null); //这里debug的时候，发现list中的user都没有createdTime和updatedTime属性
   return list;
   }