spring data jpa 多表联合查询 ， 查询结果 List 为空无法映射

一方
package com.jpa.vo;

import javax.persistence.*;
import java.io.Serializable;

@Entity
@Table(name = "role")
public class RoleVO implements Serializable {

@Id
@GeneratedValue(strategy  = GenerationType.AUTO)
@Column(name = "role_id")
private Integer roleId;

@Column(name = "role_name")
private String  roleName;

@ManyToOne
@JoinColumn(name="role_id",insertable =  false , updatable = false)
private UserVO userVO;

}

多方
package com.jpa.vo;

import javax.annotation.sql.DataSourceDefinition;
import javax.persistence.*;
import java.util.List;

/**

• 用户信息类
  */
  @Entity
  @Table(name="users")
  public class UserVO {

  @Column(name="role_id")
  private Integer roleId;

  @Id
  @Column(name = "user_id")
  @GeneratedValue
  private Integer userId;

  @Column( name="user_name")
  private String userName;

  @Column(name ="pass_word")
  private String password;

  @OneToMany( cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "userVO")
  List roles;

}

spring data jpa 多表联合查询 ， 查询结果 List 为空无法映射

{
"roleId": 1,
"userId": 1,
"userName": "wuming",
"password": "1234",
"roles": [
{}
]
}

https://blog.csdn.net/LIU_YANZHAO/article/details/79796684

这个问题已经自己解决了