javax.el.PropertyNotFoundException：在[com.rtc_insurance.model.Plan]类型上找不到属性[coverage_description]

Question

我是春季新手，所以我还不完全了解如何进行自定义查询。我在下面尝试了此代码，但它给了我一些错误。

我有这2张桌子：

计划表

计划覆盖范围

我想使用“ TEST123” plan_code来获得所有的计划覆盖范围描述。

这是我当前的代码：

Plan.java

@Entity
@Table(name="plan")
public class Plan {
    /....

    @OneToMany(targetEntity=PlanCoverage.class, mappedBy="plan",cascade=CascadeType.ALL, fetch = FetchType.LAZY)
    private List<PlanCoverage> planCoverage;

    public List<PlanCoverage> getPlanCoverage() {
        return planCoverage;
    }

    public void setPlanCoverage(List<PlanCoverage> planCoverage) {
        this.planCoverage = planCoverage;
    }

    private String coverage_description;

    public String getCoverage_description() {
        return coverage_description;
    }

}

PlanCoverage.java

@Entity
@Table(name="plan_coverage")
public class PlanCoverage {

    @ManyToOne()
    @JoinColumn(name="plan_code", referencedColumnName = "plan_code",insertable=false, updatable=false)
    private Plan plan;

    public Plan getPlan() {
        return plan;
    }

    public void setPlan(Plan plan) {
        this.plan = plan;
    }

}

PlanRepository.java

public interface PlanRepository extends CrudRepository<Plan, String> {

    @Query(nativeQuery = true, value= "SELECT * FROM plan_coverage WHERE plan_code=:planCode")
    public List<Plan> findPlanCoverage(@Param("planCode") String planCode);
}

PlanController.java

@RequestMapping(value="/PlanDescription/{plan_code}", method=RequestMethod.GET)
    public ModelAndView planDescription(@PathVariable String plan_code) {
        ModelAndView model = new ModelAndView();
        Plan plan = planService.getPlanById(plan_code);
        model.addObject("planForm",plan);

        List<Plan> coverageList = planService.findByPlanCode(plan_code);
        model.addObject("coverageList",coverageList);

        model.setViewName("plan_description");
        return model;
    }

plan_description.jsp

<c:forEach items="${coverageList }" var="coverage">
  <span>${coverage.coverage_description}</span><br>
</c:forEach>

我想访问险种说明，但这给了我这个错误。

任何帮助将不胜感激。

Answer 1

您的实体“计划”没有称为“ coverage_description”的属性（或简单地说是“ getter方法”）。您需要先定义它。自动取款机在计划实体上仅具有“ planCoverage”作为有用的属性，可在您的jsp页面中使用。