hibernate_one2one共享主键并延迟加载(注解形式)

直接上代码，一目了然， User  UserDetail

import java.sql.Timestamp;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.OneToOne;
import javax.persistence.PrimaryKeyJoinColumn;

import static javax.persistence.GenerationType.IDENTITY;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;

/**
 * User entity. @author MyEclipse Persistence Tools
 */
@Entity
@Table(name = "user")
public class User implements java.io.Serializable {

	private Integer uid;
	private String username;
	private String password;
	private String realname;
	private UserDetail userDetail;
	
	public User() {
		userDetail = new UserDetail();
	}

	@Id
	@GeneratedValue(strategy = IDENTITY)
	@Column(name = "uid", unique = true, nullable = false)
	public Integer getUid() {
		return this.uid;
	}

	public void setUid(Integer uid) {
		this.uid = uid;
	}

	@Column(name = "username", length = 30)
	public String getUsername() {
		return this.username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	@Column(name = "password", length = 30)
	public String getPassword() {
		return this.password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	@Column(name = "realname", length = 10)
	public String getRealname() {
		return this.realname;
	}

	public void setRealname(String realname) {
		this.realname = realname;
	}

	//========================= 注意这里 ====================================
	@OneToOne(fetch = FetchType.LAZY, optional = false)   
    @PrimaryKeyJoinColumn
	public UserDetail getUserDetail() {
		return this.userDetail;
	}

	public void setUserDetail(UserDetail userDetail) {
		this.userDetail = userDetail;
	}
	//=======================================================================

}

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToOne;
import javax.persistence.Table;
import org.hibernate.annotations.Parameter;
import org.hibernate.annotations.GenericGenerator;

/**
 * UserDetail entity. @author MyEclipse Persistence Tools
 */
@Entity
@Table(name = "user_detail")
public class UserDetail implements java.io.Serializable {

	private Integer udid;
	private User user;
	private String description;

	public UserDetail() {
	}

	@Id   
    @GeneratedValue(generator = "pkGenerator")    
    @GenericGenerator(    
    		name = "pkGenerator",    
    		strategy = "foreign",    
    		parameters = @Parameter(name = "property", value = "user")    
	) 
	@Column(name="udid")
	public Integer getUdid() {
		return this.udid;
	}

	public void setUdid(Integer udid) {
		this.udid = udid;
	}

	//========================= 注意这里 ====================================
	@OneToOne(mappedBy="userDetail", fetch=FetchType.LAZY, optional=false)
	public User getUser() {
		return this.user;
	}

	public void setUser(User user) {
		this.user = user;
	}
	//=======================================================================

	@Column(name = "description", length = 400)
	public String getDescription() {
		return this.description;
	}

	public void setDescription(String description) {
		this.description = description;
	}

}