如何在托管bean中获取所选项目的标签

Question

我需要你的帮助来将列表的值转换为两个变量。我的清单有描述和代码。但是，我需要将描述放在一个变量中，将代码放在另一个变量中，所以我该如何实现。

我的代码是

private String[] selectedCertificates;
private List<SelectItem> Certificates;

    public List<SelectItem> getCertificatesList(){
    Certificates = new ArrayList<SelectItem>();
    Certificates.add(new SelectItem("Certificate A","A"));
    Certificates.add(new SelectItem("Certificate B","B"));
    return bankCertificates;

}

public void setCertificates(List<SelectItem> Certificates) {
    this.Certificates = Certificates;
}
// Setters and Getters

Select 商品代码：

                         <p:selectManyCheckbox id="Certificates" value="#{user.selectedCertificates}"
                                              layout="pageDirection" disabled="#{user.secondToggle}">
                            <f:selectItems value="#{user.Certificates}" var="bankCertificates"
                                           itemLabel="#{user.CertificatesString}" itemValue="#{user.CertificatesCode}"/>
                        </p:selectManyCheckbox>

我在哪里可以定义描述应该是第一个值，代码应该是列表中的第二个值，我可以在页面中使用它们。

谢谢

Answer 1

如果您的 SelectItem bean 上有 getter（我假设您有字段描述和代码），请尝试按照以下步骤操作，它存储您的对象字段，它位于您的 ArrayList 中的第一个位置。

String description = Certificates.get(0).getDescription();
String code = Certificates.get(0).getCode();

Answer 2

尝试

class SelectItem {
    private String code;
    private String description;

    SelectItem (String code, String description) {
        this.code = code;
        this.description = description;
    }

    public String getCode () {
        return code;
    }
    public String getDescription () {
        return description;
    }
}

这是你的主要class

class MainClass {
    public static void main (String...arg) {
        //construct your list here using SelectItem class objects
        List<SelectItem> certificates =  = new ArrayList<SelectItem>();
        certificates.add(new SelectItem("Certificate A","A"));
        certificates.add(new SelectItem("Certificate B","B"));

        //now first read the SelectItem objects you have added to the list
        //or you can also iterate through the list, modify accordingly
        SelectItem si1 = certificates.get(0);
        //to read the code and description use the getters defined in SelectItem
        si1.getCode(); si1.getDescription();
    }
}

您还可以选择创建一个方法，您可以将要从列表中读取的索引传递给该方法。希望，这有帮助。

如何在托管bean中获取所选项目的标签

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