在Hibernate一对多关系中如何获取记录

Question

我有2个POJO类： Ownerdetials （父表）和Vehiclemaster （子表）。 我想获取属于Vehicle表的所​​有oname （表示所有者名称）。

我的课程：

Ownerdetails.java：

public class Ownerdetails  implements java.io.Serializable {
    private Integer ownerid;
    private String oname;
    private String panno;
    private String mobile;
    private String address;
    private String pincode;
    private String city;
    private String state;
    private String country;
    private String accno;
    private String bankname;
    private String branch;
    private String ifccode;
    private Set vehiclemasters = new HashSet(0);
    //Setter and Getter method 
 }

Vehiclemaster.java：

public class Vehiclemaster  implements java.io.Serializable {
    private Integer vid;
    private Ownerdetails ownerdetails;
    private String vno;
    private String vname;
    private String driverlicense;
    private String unladenWeight;
    private String drivername;
    private String vtype;
    private String inscompname;
    private String instype;
    private String insfrom;
    private String insto;
    private String fitnessdatefrom;
    private String fitnessdateto;
    //Setter and Getter Method
}

以下是我的SQL查询，如何在Hibernate HQL查询中转换？

select ownerdetails.oname from ownerdetails,vehiclemaster 
WHERE ownerdetails.ownerid=vehiclemaster.ownerid; 

我用谷歌搜索，但是没有得到正确的结果。

Answer 1

对应

public class Ownerdetails  implements java.io.Serializable {

  @Id
  private Integer ownerid;

  @OneToMany(mappedBy = "ownerdetails")
  private Set<Vehiclemaster> vehiclemasters = new HashSet(0);

}

public class Vehiclemaster  implements java.io.Serializable {

   @Id
   private Integer vid;

   @ManyToOne 
   @JoinColumn(name = "ownerid")
   private Ownerdetails ownerdetails;

}

询问

select distinct od.oname 
from Ownerdetails od
   inner join od.vehiclemasters vm
where vm.vname = 'name'  // optional