hibernate 中的 Entity 类中不能有 对象数组 字段 吗?
代码一:
package com.octopus.hibernate.Inheritance;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
@Entity
public class Tree2 {
	private int id;
	private String name;
	private Tree perent;
	private Tree[] suns;
	@Id
	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;
	}
	@ManyToOne
	public Tree getPerent() {
		return perent;
	}
	public void setPerent(Tree perent) {
		this.perent = perent;
	}
	@OneToMany(mappedBy="perent")
	@JoinColumn(name="p_id")
	public Tree[] getSuns() {
		return suns;
	}
	public void setSuns(Tree[] suns) {
		this.suns = suns;
	}
	
}
代码2:
package com.octopus.hibernate.Inheritance;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.MapKey;
import javax.persistence.OneToMany;
@Entity
public class Tree {
	private int id;
	private String name;
	private Tree perent;
	private Map<Integer,Tree> suns;
	@Id
	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;
	}
	@ManyToOne
	public Tree getPerent() {
		return perent;
	}
	public void setPerent(Tree perent) {
		this.perent = perent;
	}
	@OneToMany(mappedBy="perent")
	@JoinColumn(name="p_id")
	@MapKey(name="id")
	public Map<Integer,Tree> getSuns() {
		return suns;
	}
	public void setSuns(Map<Integer,Tree> suns) {
		this.suns = suns;
	}
	
	
}
代码1使用的 对象数组,代码2 中使用的是Map
代码一生成表的时候报错:
Exception in thread "main" org.hibernate.AnnotationException: @OneToOne or @ManyToOne on com.octopus.hibernate.Inheritance.Tree2.perent references an unknown entity: com.octopus.hibernate.Inheritance.Tree
	at org.hibernate.cfg.ToOneFkSecondPass.doSecondPass(ToOneFkSecondPass.java:81)
	at org.hibernate.cfg.AnnotationConfiguration.processEndOfQueue(AnnotationConfiguration.java:456)
	at org.hibernate.cfg.AnnotationConfiguration.processFkSecondPassInOrder(AnnotationConfiguration.java:438)
	at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:309)
	at org.hibernate.cfg.Configuration.generateDropSchemaScript(Configuration.java:803)
	at org.hibernate.tool.hbm2ddl.SchemaExport.<init>(SchemaE