使用rich：dataTable和rich：dataTableScroller延迟加载数据

Question

I am using rich:dataTable with rich:dataTableScroller . And I don't want load all my data from DB when initialize table, because I have very many records. I want that that rich:dataTableScroller show me real page count but load page only when I switch on in. I find some solution here But I want use rich:dataTable and rich:dataTableScroller , and don't write my own components. Have somebody some ideas ?

Answer 1

You should create a custom org.richfaces.model.DataProvider , and in getItemsByRange you should fetch the limited data. You should then construct an ExtendedTableDataModel passing your custom DataProvider , and use this model in your <rich:dataTable> - value="#{myBean.myExtendedDataModel}"

Answer 2

You can create your own "PagedDataModel", which actually returns only the data that will be shown in the page you are seeing.

I have found an example for this here .

Answer 3

您可以将自己的数据模型编写为richfaces ExtendedDataModel的子模型，该子模型具有以下方法：

protected List<T> loadData(int offset, int limit, List<Order> orders)