这是一个自关联的实体：

package com.mxlvniao.entity.dao;

import java.io.Serializable;
import java.util.List;

import org.nutz.dao.entity.annotation.Column;
import org.nutz.dao.entity.annotation.Many;
import org.nutz.dao.entity.annotation.ManyMany;
import org.nutz.dao.entity.annotation.Name;
import org.nutz.dao.entity.annotation.Table;

@Table("tb_destination")
public class Destination implements Serializable {
	private static final long serialVersionUID = -329026169568853770L;

	@Name
	private String id;
	@Column
	private String name;
	@Column
	private String pid;
	@Column
	private Integer qizhouId;
	@Column
	private Integer layer;
	@Many(target = Destination.class, field = "pid")
	private List<Destination> children;
	// 怎么关联父类实体，我不知我这么写对不对？
	@ManyMany(target = Destination.class, relation = "t_destination", from = "pid", to = "id")
	private Destination parentDest;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getPid() {
		return pid;
	}

	public void setPid(String pid) {
		this.pid = pid;
	}

	public Integer getQizhouId() {
		return qizhouId;
	}

	public void setQizhouId(Integer qizhouId) {
		this.qizhouId = qizhouId;
	}

	public Integer getLayer() {
		return layer;
	}

	public void setLayer(Integer layer) {
		this.layer = layer;
	}

	public List<Destination> getChildren() {
		return children;
	}

	public void setChildren(List<Destination> children) {
		this.children = children;
	}

	public Destination getParentDest() {
		return parentDest;
	}

	public void setParentDest(Destination parentDest) {
		this.parentDest = parentDest;
	}

}