hibernate 注解 生成复合主键

本文出自:http://blog.csdn.net/hongchangfirsthibernate里边的复合主键是需要其他方式来声明的，需要先写一个主键类，把主键字段（如，tour_id和morph_id）封装在一个类里边，并实现hashCode和equals方法，保证hibernate可以确定一个主键，如下：class Tour_MorphID implements Serializable {private static final long serialVersionUID = 155771990L;private Integer Tour_id;private Integer Morph_id;@Overridepublic int hashCode() {int result = 1;result = Tour_id.hashCode() + Morph_id.hashCode();return result;}@Overridepublic boolean equals(Object obj) {if (this == obj)return true;if (obj == null)return false;if (getClass() != obj.getClass())return false;final Tour_MorphID other = (Tour_MorphID) obj;if (Tour_id == other.Tour_id && Morph_id == other.Morph_id)return true;return false;}getter...setter...}然后在需要复合主键类的实体类里边写上@IdClass注解，如下：@Entity@IdClass(Tour_MorphID.class)@Table(name = "Tour_Morph")public class Tour_Morph implements Serializable {serialVersionUID ..@Id@Column(name = "Tour_id")private Integer Tour_id;@Id@Column(name = "Morph_id")private Integer Morph_id;//other fields...getter...setter...}