java - 如何转换nativeselect选择的值vaadin

Question

我有一个像这样的本地选择:

 occupationSelect = new NativeSelect("Occupation:");
    occupationSelect.setRequired(true);
    occupationSelect.setRequiredError("Must Not be Empty");
    occupationSelect.setImmediate(true);
    occupationSelect.setWidth(COMMON_FIELD_WIDTH);
    occupationSelect.setNullSelectionItemId(0);
    occupationSelect.setItemCaption(0, "--Select");
    occupationSelect.addItem(1);
    occupationSelect.setItemCaption(1, "static");

在模态类 Registration.java 中

    private OccupationBean occupationBean;

职业Bean.java

    private Long occupationId;
    private String occupationName;

绑定(bind)这个字段

  binderFieldGroupPersonalDetails.bind(occupationSelect,
            "occupationBean.occupationId");

我收到这个错误:

无法将类型 java.lang.Integer 的值转换为模型类型类 java.lang.Long。未设置转换器且类型不兼容。

IntegerToLong 没有默认转换器

我怎样才能做到这一点

Answer 1

简单地使用 0L 而不是 0

occupationSelect.setNullSelectionItemId(0L);
occupationSelect.setItemCaption(0L, "--Select");
occupationSelect.addItem(1L);
occupationSelect.setItemCaption(1L, "static");