属性映射的列数错误

Question

我正在使用休眠4.2.21版本。我有部分实体，我使用了@Embedded和@Embeddable注释。当尝试运行项目时，它会给出一个异常;

属性映射具有错误的列数：com.demo.School.teacher 类型：对象

学校实体类

@Entity(name = "School")
public class{
public String schoolId;
public String schoolName;
@Embedded
@AttributeOverrides({
@AttributeOverride(name = "teacherName",column = @Column(name = "teacherName")),
@AttributeOverride(name = "teacherPhone",column = @Column(name = "teacherPhone")),
})
@XmlElements({
@XmlElement(name = "TeacherU", type = TeacherU.class),
@XmlElement(name = "TeacherH", type = TeacherH.class)
})
public object teacher;
//getters and setters 
}

教师(大学(实体类

@Embeddable
public class TeacherU {
public String teacherName;
public String teacherPhone;
//getters and setters 
}

教师(高中(实体类

@Embeddable
public class TeacherH {
public String teacherName;
public String teacherPhone;
//getters and setters 
}

Answer 1

不应将教师声明为对象，更改

public object teacher;

自

public Teacher teacher;