java - JSP无法访问对象属性

Question

我有对象项目:

public class Project {
    public static int projectid = 0;

    private int id;

    private String name;
    private String description;

    private Category category;

    public DonationLogic donation;

    private String link;
    private String questionsAndAnswers;

    //methods
}

和 DonationLogic(是项目的属性(property)):

public class DonationLogic {
    private int totalAmount;
    private int daysLeft;
    private double collectAmount;
    private int id;
    private String donatorname;
    private int daonatorcardid;
    private static int donationid = 0;

    //methods
}

我尝试访问 JSP 中的项目属性:

<c:forEach var="project" items="${projects}">
            <c:out value="${project.name}"/></a></br>
            Name: <c:out value="${project.name}"/></br>
            Description: <c:out value="${project.description}"/></br>
            TotalAmount/CollectAmount: <c:out value="${project.donation.totalAmount}/${project.donation.collectAmount}"/></br>
            DaysLeft: <c:out value="${project.donation.daysLeft}"/></br>
            Category: <c:out value="${project.category.name}"/></br>
        </c:forEach>

除了带有 project.donation.XXX 的行之外，所有代码都可以工作。错误是:

javax.el.PropertyNotFoundException: Property 'donation' not found on type data.Project

我能做什么？与 project.category.name 一起工作我注意到属性(property)捐赠是公开的，而其他则是私有(private)的。也许问题就出在这里？

Answer 1

添加 getter 方法:

public DonationLogic getDonation {
    return this.donation;
}

您还可以在 jsp 中添加类似的内容来查看对象的外观:

PROJECTS=${projects}<br/>
<c:forEach var="project" items="${projects}">
            PROJECT=${project}<br/>
            <c:out value="${project.name}"/></a></br>
            Name: <c:out value="${project.name}"/></br>
            Description: <c:out value="${project.description}"/></br>
            TotalAmount/CollectAmount: <c:out value="${project.donation.totalAmount}/${project.donation.collectAmount}"/></br>
            DaysLeft: <c:out value="${project.donation.daysLeft}"/></br>
            Category: <c:out value="${project.category.name}"/></br>
</c:forEach>