hibernate一多一关联配置出错org.hibernate.MappingException:should be mapped with insert="false"update="false

表结构student 表    id,name,nubber;studentClass 表   id ,stuName,project,student_id;Student 类配置省略studentClass类 关系维护方配置时。不需要配置 student_id 属性了；如：public class StudentClass{    private Integer id;        private String stuName;        private String project;        //private Integer student_id //不需要配置改属性        private Student student;//由Student 指向student_id就行   //get set 方法省略    @OneToOne(fetch=FetchType.LAZY)    @JoinColumn(name="student_id",referencedColumnName="id")     public Student getStudent() {        return student;    }}