Question

我的jsf页面

<h:form>
    <h:dataTable id="btable" value="#{ballController.items}" var="item">
         <h:column>
             <h:outputText value="#{item.id}"/>
         </h:column>
         <h:column>
             <h:outputText value="#{item.bname}"/>
         </h:column>
    </h:dataTable>

    <h:commandButton action="#{ballCOntroller.items}" value="test">
          <f:ajax execute="@form" render="btable" />
    </h:commandButton> 
</h:form>

在我的控制器中，此方法由ballController.items

调用

public DataModel getItems() {
    if (items == null) {
        items = getPagination().createPageDataModel();
    }
    return items;
}

但点击按钮后会给我一个错误说：

serverError：classjavax.faces.el.MethodNotFoundException /app/ball/index.xhtml @ 40,101 action =“＃{ballController.items}”：方法找不到：ballController@a7150b6.items（）

我的目标是在点击命令按钮时重新加载dataTable，而不刷新整个页面。

*被修改

我的整个bean代码

@ManagedBean(name = "ballController")
@ViewScoped
public class ballController implements Serializable {

    private ball current;
    private DataModel items = null;
    @EJB
    private ballFacade ejbFacade;
    private PaginationHelper pagination;
    private int selectedItemIndex;

    public ballController() {
    }

    public ball getSelected() {
        if (current == null) {
            current = new ball();
            selectedItemIndex = -1;
        }
        return current;
    }

    private ballFacade getFacade() {
        return ejbFacade;
    }

    public PaginationHelper getPagination() {
        if (pagination == null) {
            pagination = new PaginationHelper(10) {
                @Override
                public int getItemsCount() {
                    return getFacade().count();
                }

                @Override
                public DataModel createPageDataModel() {
                    return new ListDataModel(getFacade().findRange(new int[]{getPageFirstItem(), getPageFirstItem() + getPageSize()}));
                }
            };
        }
        return pagination;
    }

    public String prepareList() {
        recreateModel();
        return "List";
    }

    public String prepareView() {
        current = (ball) getItems().getRowData();
        selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex();
        return "View";
    }

    public String prepareCreate() {
        current = new ball();
        selectedItemIndex = -1;
        return "index";
    }

    public String create() {
        try {

            getFacade().create(current);
            JsfUtil.addSuccessMessage(ResourceBundle.getBundle("/Bundle").getString("ballCreated"));
            return prepareCreate();
//            return null;
        } catch (Exception e) {
            JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured"));
            return null;
        }
    }

    public String prepareEdit() {
        current = (ball) getItems().getRowData();
        selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex();
        return "Edit";
    }

    public String update() {
        try {
            getFacade().edit(current);
            JsfUtil.addSuccessMessage(ResourceBundle.getBundle("/Bundle").getString("ballUpdated"));
            return "View";
        } catch (Exception e) {
            JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured"));
            return null;
        }
    }

    public String destroy() {
        current = (ball) getItems().getRowData();
        selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex();
        performDestroy();
        recreatePagination();
        recreateModel();
        return "List";
    }

    public String destroyAndView() {
        performDestroy();
        recreateModel();
        updateCurrentItem();
        if (selectedItemIndex >= 0) {
            return "View";
        } else {
            // all items were removed - go back to list
            recreateModel();
            return "List";
        }
    }

    private void performDestroy() {
        try {
            getFacade().remove(current);
            JsfUtil.addSuccessMessage(ResourceBundle.getBundle("/Bundle").getString("ballDeleted"));
        } catch (Exception e) {
            JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured"));
        }
    }

    private void updateCurrentItem() {
        int count = getFacade().count();
        if (selectedItemIndex >= count) {
            // selected index cannot be bigger than number of items:
            selectedItemIndex = count - 1;
            // go to previous page if last page disappeared:
            if (pagination.getPageFirstItem() >= count) {
                pagination.previousPage();
            }
        }
        if (selectedItemIndex >= 0) {
            current = getFacade().findRange(new int[]{selectedItemIndex, selectedItemIndex + 1}).get(0);
        }
    }

    public DataModel getItems() {
        if (items == null) {
            items = getPagination().createPageDataModel();
        }
        return items;

    }

    private void recreateModel() {
        items = null;
    }

    private void recreatePagination() {
        pagination = null;
    }

    public String next() {
        getPagination().nextPage();
        recreateModel();
        return "List";
    }

    public String previous() {
        getPagination().previousPage();
        recreateModel();
        return "List";
    }

    public SelectItem[] getItemsAvailableSelectMany() {
        return JsfUtil.getSelectItems(ejbFacade.findAll(), false);
    }

    public SelectItem[] getItemsAvailableSelectOne() {
        return JsfUtil.getSelectItems(ejbFacade.findAll(), true);
    }

    @FacesConverter(forClass = ball.class)
    public static class ballControllerConverter implements Converter {

        public Object getAsObject(FacesContext facesContext, UIComponent component, String value) {
            if (value == null || value.length() == 0) {
                return null;
            }
            ballController controller = (ballController) facesContext.getApplication().getELResolver().
                    getValue(facesContext.getELContext(), null, "ballController");
            return controller.ejbFacade.find(getKey(value));
        }

        java.lang.Integer getKey(String value) {
            java.lang.Integer key;
            key = Integer.valueOf(value);
            return key;
        }

        String getStringKey(java.lang.Integer value) {
            StringBuffer sb = new StringBuffer();
            sb.append(value);
            return sb.toString();
        }

        public String getAsString(FacesContext facesContext, UIComponent component, Object object) {
            if (object == null) {
                return null;
            }
            if (object instanceof ball) {
                ball o = (ball) object;
                return getStringKey(o.getId());
            } else {
                throw new IllegalArgumentException("object " + object + " is of type " + object.getClass().getName() + "; expected type: " + ball.class.getName());
            }
        }
    }
}

Answer 1

要重新加载表格，您只需使用<f:ajax render="btable" />

即可

<h:commandButton value="test">
      <f:ajax render="btable" />
</h:commandButton>

但是要做一些动作，比如向表中添加一些数据，你需要将按钮指向一个正确的方法

<h:commandButton value="test" action="#{ballController.addItem}"">
      <f:ajax render="btable" />
</h:commandButton> 


public void addItem() {
    if (items == null) {
        items = getPagination().createPageDataModel();
    }
    items.getWrappedData().add(/*something like new MyObject("one","two")*/);
}

Answer 2

serverError: classjavax.faces.el.MethodNotFoundException /app/ball/index.xhtml @40,101 action="#{ballController.items}": Method not found: ballController@a7150b6.items()

正在发生，因为您尝试以不正确的方式访问getItems。

将您的bean代码更新为：

public DataModel items() {
    if (items == null) {
        items = getPagination().createPageDataModel();
    }
    return items;
}

或者将您的facelet动作EL表达式更改为action="#{ballCOntroller.getItems}"。

修改

您可以将List更新为：

public class DataTableBean implements Serializable { List<String> dataModelList = new ArrayList<DataModel>(); public List<DataModel> getDataModelList() { return dataTableList; } public void setDataModelList(List<String> dataModelList) { this.dataTableList = dataTableList; } public void addItems(){ List<DataModel> tempList = getPagination().createPageDataModel(); // Returns a list of type `List<DataModel>`. dataModelList.addAll(tempList); } }

在单击命令按钮时重新加载使用CRUD生成的jsf数据表

2 个答案: