JSF的dataTable应用selectBooleanCheckbox

JSF的dataTable使用selectBooleanCheckbox
JSF

<h:form>    <h:dataTable value="#{myBean.dataList}" var="item">        <h:column>            <f:facet name="header">                <h:outputText value="Select" />            </f:facet>            <h:selectBooleanCheckbox value="#{myBean.selectedIds[item.id]}" />        </h:column>          ...    </h:dataTable>    <h:commandButton value="Get selected items" action="#{myBean.getSelectedItems}" /></h:form>

public class MyBean ...{    private Map selectedIds = new HashMap();    private List selectedDataList;    public String getSelectedItems() ...{         selectedDataList = new ArrayList();        for (MyData dataItem : dataList) ...{            //如果使用了分页的话这个判断不可少.            if(selectIds.get(dataItem.getId())==null)...{                  continue;             }            if (selectedIds.get(dataItem.getId()).booleanValue()) ...{                 selectedDataList.add(dataItem);                 selectedIds.remove(dataItem.getId()); // 删掉已取的项.             }         }        // 这里加需要处理的代码, 比如批量删除或修改.        return "selected";     }    public Map getSelectedIds() ...{        return selectedIds;     }    public List getSelectedDataList() ...{        return selectedDataList;     }}