當此頁面加載時,需要一個viewparam並使用轉換器來獲取對象。JSF - 在ViewScoped bean中使用paginator時傳遞f:param
即時得到當使用分頁程序,因爲viewParam沒有被傳遞到轉換器
在java.lang.Long.parseLong(來源不明) 在com.civi.HelloWorld.controller以下錯誤。 UserConverter.getAsObject(UserConverter.java:36)
每次頁面刷新時都需要一個傳遞給它的參數。
所以在數據表中使用pagintor當我需要發送F:PARAM序爲viewParam使用轉換器來加載對象
<f:metadata>
<f:viewParam
name="idUser"
value="#{userBean.tipTourUser}"
converter="#{userConverter}"
required="true"
requiredMessage="Bad request. Please use a link from within the system." />
</f:metadata>
<h:form id="abc" styleClass="simpleformstyle">
<p:dataTable id="transactionsTable"
var="transaction"
resizableColumns="true"
value="#{userBean.tipTourUser.tips}"
rendered="#{not empty userBean.tipTourUser.tips}"
rows="2"
paginator="true"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="1,2,3"
paginatorPosition="bottom" >
//SOMETHING LIKE THIS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
<f:param name="idUser" value="#{userBean.tipTourUser.idUser}" />
//SOMETHING LIKE THIS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
<p:column>
<f:facet name="header">
<h:outputText style="float: left;" value="Date received" />
</f:facet>
<h:outputText value="#{transaction.received}" >
<f:convertDateTime pattern="d-M-yyyy" />
</h:outputText>
</p:column>
</p:dataTable>
</h:form>
的UserBean
@ViewScoped
@Named
public class UserBean implements Serializable {
private static final long serialVersionUID = 1L;
@EJB
private UserService userService;
private User tipTourUser;
private boolean editmode;
//sets the edit mode and stores the original values
public void edit() {
editmode = true;
}
//resets the original values and leaves the edit mode
public void cancel() {
editmode = false;
}
//saves updated values and leavers the edit mode
public void save(User user) {
tipTourUser = userService.updateUser(user);
editmode = false;
}
public boolean isEditmode() {
return editmode;
}
public User getTipTourUser() {
return tipTourUser;
}
public void setTipTourUser(User tipTourUser) {
this.tipTourUser = tipTourUser;
}
}
轉換
@Named
@RequestScoped
public class UserConverter implements Converter
{
@EJB
private UserService userService;
public UserConverter() {
}
//get User object from idUser, key = idUser
@Override
public Object getAsObject(FacesContext arg0, UIComponent arg1, String key) throws ConverterException {
return userService.getUser(Long.parseLong(key));
}
@Override
public String getAsString(FacesContext arg0, UIComponent arg1, Object arg2) throws ConverterException {
return arg2.toString();
}
}
什麼時候你正在重新加載頁面?是否有必要或者不能使用ajax? – djmj
當我在數據表中使用分頁(改變頁面或使用RowsPerPageDropdown),頁面然後重新加載並試圖獲取viewParam,但f:param不傳遞任何東西,因爲 – blitzeus
您有一個'h:form'圍繞數據表? PrimeFaces數據表分頁不默認刷新頁面。它是一個AJAX組件。 – djmj