错误:类型不匹配-如何使用Spring MVC窗体持久化双向一对一映射

当我使用JSP分配值时,这种编码方式最终会导致类型不匹配。( 编辑 :类型不匹配打开 applicant_id )

用例很简单: 当在“邀请申请人”屏幕上时,用户应该能够选择时间和日期并提交表单,表单将指定的时间和日期分配给申请人,反之亦然。

主控制器

@RequestMapping("/manageApplicant/invite")
public String inviteScreen(@RequestParam(value="id") int id, Model theModel) {
    theModel.addAttribute("interview", new Interview());
    Applicant applicants = mainService.getSpecificApplicant(id);
    theModel.addAttribute("applicants", applicants);
    return "invite-applicant";
}

面谈类变量声明

@OneToOne(cascade=CascadeType.PERSIST)
@JoinColumn(name="applicant_id", nullable=false)
private Applicant applicant_id;

申请人类变量声明

@OneToOne(cascade=CascadeType.PERSIST)
@JoinColumn(name="interview_id")
private Interview interview_id;

JSP

<form:form action="/management/recruitment/setInterview" modelAttribute="interview">
<form:hidden path="applicant_id" value="${applicants}"/>
Date<form:input type="DATE" path="interviewDate"/><br>
Time<form:input type="TIME" path="interviewTime"/>
<br>
<input type="submit" value="Invite for interview" id="submitButton" />
</form:form>

MySQL表

CREATE TABLE interviews(
id INT auto_increment NOT NULL, PRIMARY KEY(id),
applicant_id int(11),
interviewDate date,
interviewTime time,
CONSTRAINT `FK_Applicant` FOREIGN KEY (`applicant_id`)
REFERENCES `applicant` (`id`)
);

ALTER TABLE applicant ADD 
CONSTRAINT `interviews_ibfk_1` FOREIGN KEY (`interview_id`)
REFERENCES `interviews` (`id`);

访谈DAO实施

public void saveInterview(Interview theInterview) {
    // get current session
    Session currentSession = sessionFactory.getCurrentSession();
    // save interview
    currentSession.save(theInterview);
}