spring boot jpa怎么联合查询
[b]两张表,学生表,班级表,学生表中有班级表的id,我想用联合查询将班级名称连到学生信息里,
@Entity
@Table(name = "student")
public class Student {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
@Column
private String name;
@Column
private String classId;
}
@Entity
@Table(name = "class")
public class Class {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer classId;
@Column
private String className;
}
最后想得到的是student id,name,classId, className这四个属性的对象,问下这种 怎么实现?