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Wicket NotSerializableException填充ListView

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Wicket NotSerializableException填充ListView,wicket,wicket-6,Wicket,Wicket 6,我正在开发一个使用Spring和Hibernate框架的Web应用程序。现在，我想从我的Viaggio.java类（一个JPA实体）中删除可序列化接口实现。 此类的实体通过PageableListView显示在我的Wicket页面中。 当我呈现网页时，我得到一个NotSerializableException。 下面是实例化ListView的代码片段： final LoadableDetachableModel<List<Viaggio>> viaggiL

我正在开发一个使用Spring和Hibernate框架的Web应用程序。现在，我想从我的Viaggio.java类（一个JPA实体）中删除可序列化接口实现。 此类的实体通过PageableListView显示在我的Wicket页面中。 当我呈现网页时，我得到一个NotSerializableException。 下面是实例化ListView的代码片段：

        final LoadableDetachableModel<List<Viaggio>> viaggiListModel = new LoadableDetachableModel<List<Viaggio>>() {
        @Override
        protected List<Viaggio> load() {
            List<Viaggio> viaggi = utenteService.findAllViaggiForDataAndUsername(dataSelected, utente);
            return viaggi;
        }
    };

    final WebMarkupContainer container = new WebMarkupContainer("tableResult");
    container.setOutputMarkupId(true);
    PageableListView repeating = new PageableListView("repeating", viaggiListModel, 10) {
        @Override
        protected void populateItem(ListItem item) {
            final Viaggio viaggio = (Viaggio) item.getModelObject();
            String date = new SimpleDateFormat("dd-MM-yyyy").format(viaggio.getData());
            item.add(new Label("data", date));
            item.add(new Label("automezzo", new PropertyModel(viaggio, "targaMotrice")));
            item.add(new Label("autista", new PropertyModel(viaggio, "primoAutista")));
            item.add(new EnumLabel("status", new PropertyModel(viaggio, "status")));
......

final LoadableDetachableModel viaggilitmodel=new LoadableDetachableModel（）{
@凌驾
受保护列表加载（）{
列表viaggi=uteService.findAllViaggiForDataAndUsername（dataSelected，ute）；
返回维亚吉；
}
};
最终WebMarkupContainer容器=新的WebMarkupContainer（“tableResult”）；
container.setOutputMarkupId（true）；
PageableListView repeating=新的PageableListView（“repeating”，viaggiListModel，10）{
@凌驾
受保护的void populateItem（列表项）{
final Viaggio Viaggio=（Viaggio）item.getModelObject（）；
字符串日期=新的SimpleDataFormat（“dd-MM-yyyy”）.format（viaggio.getData（））；
添加（新标签（“数据”，日期））；
添加（新标签（“automezzo”，新PropertyModel（viaggio，targaMotrice”））；
添加（新标签（“autista”，新PropertyModel（viaggio，“Primoutistta”））；
添加（新EnumLabel（“状态”），新PropertyModel（viaggio，“状态”））；
......
我将stacktrace打印在这里：

    24/02/2018 09:06:22,629 ERROR -JavaSerializer - Error serializing object class it.loginet.buonicarico.presentation.ViaggioListPage [object=[Page class = it.loginet.buonicarico.presentation.ViaggioListPage, id = 2, render count = 1]]
    org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream$ObjectCheckException: The object type is not Serializable!
A problem occurred while checking object with type: it.loginet.buonicarico.domain.utente.Viaggio
Field hierarchy is:
  2 [class=it.loginet.buonicarico.presentation.ViaggioListPage, path=2]
    private java.lang.Object org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
      private java.lang.Object org.apache.wicket.MarkupContainer.children[5] [class=org.apache.wicket.markup.html.WebMarkupContainer, path=2:tableResult]
        private java.lang.Object org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
          private java.lang.Object org.apache.wicket.MarkupContainer.children[0] [class=org.apache.wicket.markup.html.navigation.paging.PagingNavigator, path=2:tableResult:navigator]
            private java.lang.Object org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
              private java.lang.Object org.apache.wicket.MarkupContainer.children[0] [class=org.apache.wicket.markup.html.navigation.paging.PagingNavigation, path=2:tableResult:navigator:navigation]
                private java.lang.Object org.apache.wicket.MarkupContainer.children [class=org.apache.wicket.markup.html.list.LoopItem, path=2:tableResult:navigator:navigation:0]
                  private java.lang.Object org.apache.wicket.MarkupContainer.children [class=org.apache.wicket.markup.html.navigation.paging.PagingNavigationLink, path=2:tableResult:navigator:navigation:0:pageLink]
                    protected final org.apache.wicket.markup.html.navigation.paging.IPageable org.apache.wicket.markup.html.navigation.paging.PagingNavigationLink.pageable [class=org.apache.wicket.markup.html.list.PageableListView, path=2:tableResult:repeating]
                      private java.lang.Object org.apache.wicket.MarkupContainer.children [class=org.apache.wicket.markup.html.list.ListItem, path=2:tableResult:repeating:0]
                        private java.lang.Object org.apache.wicket.MarkupContainer.children [class=[Ljava.lang.Object;]
                          java.lang.Object org.apache.wicket.Component.data[1] [class=org.apache.wicket.markup.html.basic.Label, path=2:tableResult:repeating:0:automezzo]
                            java.lang.Object org.apache.wicket.Component.data [class=org.apache.wicket.model.PropertyModel]
                              private java.lang.Object org.apache.wicket.model.ChainingModel.target [class=it.loginet.buonicarico.domain.utente.Viaggio] <----- field that is causing the problem
    at org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream.internalCheck(CheckingObjectOutputStream.java:362)
    at org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream.check(CheckingObjectOutputStream.java:341)

24/02/2018 09:06:22629 ERROR-JavaSerializer-ERROR序列化对象类it.loginet.buonicarico.presentation.ViaggioListPage[object=[Page class=it.loginet.buonicarico.presentation.ViaggioListPage，id=2，呈现计数=1]]
org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream$ObjectCheckException:对象类型不可序列化！
检查类型为it.loginet.buonicarico.domain.utete.Viaggio的对象时出现问题
字段层次结构是：
2[class=it.loginet.buonicarico.presentation.ViaggioListPage，path=2]
private java.lang.Object org.apache.wicket.MarkupContainer.children[class=[Ljava.lang.Object；]
private java.lang.Object org.apache.wicket.MarkupContainer.children[5][class=org.apache.wicket.markup.html.WebMarkupContainer，path=2:tableResult]
private java.lang.Object org.apache.wicket.MarkupContainer.children[class=[Ljava.lang.Object；]
私有java.lang.Object org.apache.wicket.MarkupContainer.children[0][class=org.apache.wicket.markup.html.navigation.PagingNavigator，path=2:tableResult:navigator]
private java.lang.Object org.apache.wicket.MarkupContainer.children[class=[Ljava.lang.Object；]
private java.lang.Object org.apache.wicket.MarkupContainer.children[0][class=org.apache.wicket.markup.html.navigation.paging.PagingNavigation，path=2:tableResult:navigator:navigation]
private java.lang.Object org.apache.wicket.MarkupContainer.children[class=org.apache.wicket.markup.html.list.LoopItem，path=2:tableResult:navigator:navigation:0]
私有java.lang.Object org.apache.wicket.MarkupContainer.children[class=org.apache.wicket.markup.html.navigation.paging.PagingNavigationLink，path=2:tableResult:navigator:navigation:0:pageLink]
受保护的最终org.apache.wicket.markup.html.navigation.paging.IPageable org.apache.wicket.markup.PagingNavigationLink.pageable[class=org.apache.wicket.markup.html.list.PageableListView，path=2:tableResult:重复]
private java.lang.Object org.apache.wicket.MarkupContainer.children[class=org.apache.wicket.markup.html.list.ListItem，path=2:tableResult:repeating:0]
private java.lang.Object org.apache.wicket.MarkupContainer.children[class=[Ljava.lang.Object；]
java.lang.Object org.apache.wicket.Component.data[1][class=org.apache.wicket.markup.html.basic.Label，path=2:tableResult:repeating:0:automezzo]
java.lang.Object org.apache.wicket.Component.data[class=org.apache.wicket.model.PropertyModel]

私有java.lang.Object org.apache.wicket.model.ChainingModel.target[class=it.loginet.buonicarico.domain.utete.Viaggio]您的所有标签都引用属性模型，属性模型本身直接引用您的实体

根据经验法则，您不应调用
IModel#getObject（）
，并将其结果保留的时间超过需要的时间：


    final WebMarkupContainer container = new WebMarkupContainer("tableResult");
    container.setOutputMarkupId(true);
    PageableListView<Viaggio> repeating = new PageableListView<Viaggio>("repeating", viaggiListModel, 10) {
        @Override
        protected void populateItem(ListItem<Viaggio> item) {
            final IModel<Viaggio> viaggio = item.getModel();

            item.add(new Label("data", new AbstractReadOnlyModel<String>() {
                public String getObject() {
                    return new SimpleDateFormat("dd-MM-yyyy").format(viaggio.getObject().getData())
                }
            });
            item.add(new Label("automezzo", new PropertyModel(viaggio, "targaMotrice")));
            item.add(new Label("autista", new PropertyModel(viaggio, "primoAutista")));
            item.add(new EnumLabel("status", new PropertyModel(viaggio, "status")));
......



final WebMarkupContainer=新的WebMarkupContainer（“tableResult”）；
container.setOutputMarkupId（true）；
PageableListView repeating=新的PageableListView（“repeating”，viaggiListModel，10）{
@凌驾
受保护的void populateItem（列表项）{
最终IModel viaggio=item.getModel（）；
添加（新标签（“数据”，新AbstractReadOnlyModel）（）{
公共字符串getObject（）{
返回新的SimpleDataFormat（“dd-MM-yyyy”）.format（viaggio.getObject（）.getData（））
}
});
添加（新标签（“automezzo”，新PropertyModel（viaggio，targaMotrice”））；
添加（新标签（“autista”，新PropertyModel（viaggio，“Primoutistta”））；
添加（新EnumLabel（“状态”），新PropertyModel（viaggio，“状态”））；
......


除了AbstractReadOnlyModel，您还可以使用PropertyModel，并让转换器对日期进行格式化