4
我有Primesfaces的延遲加載dataTable的一些問題，令人耳目一新。我正在使用3.0.M4。Primefaces的dataTable不刷新內容
有與過濾你的榜樣三個類等。也試圖與遲緩裝載僅但隨後的數據沒有被在所述控制器重新加載的例子。所以我用過濾的第二個例子。在那裏，我得到了控制重載事件（記錄器顯示「加載數據」）。 但表不顯示新數據:-(。爲什麼呢？
如果誰可以幫助嗎？
親切的問候！
LazyCarDataModel
package org.jboss.as.quickstarts.helloworld;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.primefaces.model.LazyDataModel;
import org.primefaces.model.SortOrder;
/**
* Dummy implementation of LazyDataModel that uses a list to mimic a real datasource like a database.
*/
public class LazyCarDataModel extends LazyDataModel<Car> {
private static final long serialVersionUID = 1L;
private List<Car> datasource;
public LazyCarDataModel(List<Car> datasource) {
this.datasource = datasource;
}
@Override
public Car getRowData(String rowKey) {
for(Car car : datasource) {
if(car.getModel().equals(rowKey))
return car;
}
return null;
}
@Override
public Object getRowKey(Car car) {
return car.getModel();
}
@Override
public List<Car> load(int first, int pageSize, String sortField, SortOrder sortOrder, Map<String,String> filters) {
List<Car> data = new ArrayList<Car>();
//filter
for(Car car : datasource) {
boolean match = true;
for(Iterator<String> it = filters.keySet().iterator(); it.hasNext();) {
try {
String filterProperty = it.next();
String filterValue = filters.get(filterProperty);
String fieldValue = String.valueOf(car.getClass().getField(filterProperty).get(car));
if(filterValue == null || fieldValue.startsWith(filterValue)) {
match = true;
}
else {
match = false;
break;
}
} catch(Exception e) {
match = false;
}
}
if(match) {
data.add(car);
}
}
//sort
if(sortField != null) {
Collections.sort(data, new LazySorter(sortField, sortOrder));
}
//rowCount
int dataSize = data.size();
this.setRowCount(dataSize);
//paginate
if(dataSize > pageSize) {
try {
return data.subList(first, first + pageSize);
}
catch(IndexOutOfBoundsException e) {
return data.subList(first, first + (dataSize % pageSize));
}
}
else {
return data;
}
}
}
LazyTableBean
package org.jboss.as.quickstarts.helloworld;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import javax.enterprise.context.SessionScoped;
import javax.inject.Named;
import org.primefaces.model.LazyDataModel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Named
@SessionScoped
public class LazyTableBean implements Serializable {
private static final long serialVersionUID = 1L;
private final static Logger logger = LoggerFactory.getLogger(LazyTableBean.class);
private final static String[] colors;
private final static String[] manufacturers;
private List<Car> cars;
static {
colors = new String[10];
colors[0] = "Black";
colors[1] = "White";
colors[2] = "Green";
colors[3] = "Red";
colors[4] = "Blue";
colors[5] = "Orange";
colors[6] = "Silver";
colors[7] = "Yellow";
colors[8] = "Brown";
colors[9] = "Maroon";
manufacturers = new String[10];
manufacturers[0] = "Mercedes";
manufacturers[1] = "BMW";
manufacturers[2] = "Volvo";
manufacturers[3] = "Audi";
manufacturers[4] = "Renault";
manufacturers[5] = "Opel";
manufacturers[6] = "Volkswagen";
manufacturers[7] = "Chrysler";
manufacturers[8] = "Ferrari";
manufacturers[9] = "Ford";
}
private LazyCarDataModel lazyModel;
private Car selectedCar;
public LazyTableBean() {
cars = new ArrayList<Car>();
populateLazyRandomCars(cars, 100000);
lazyModel = new LazyCarDataModel(cars);
}
public Car getSelectedCar() {
return selectedCar;
}
public void setSelectedCar(Car selectedCar) {
this.selectedCar = selectedCar;
}
public LazyDataModel<Car> getLazyModel() {
return lazyModel;
}
private void populateLazyRandomCars(List<Car> list, int size) {
System.out.println("Loading data");
for(int i = 0 ; i < size ; i++) {
list.add(new Car(getRandomModel(), getRandomYear(), getRandomManufacturer(), getRandomColor()));
}
}
private String getRandomColor() {
return colors[(int) (Math.random() * 10)];
}
private String getRandomManufacturer() {
return manufacturers[(int) (Math.random() * 10)];
}
private int getRandomYear() {
return (int) (Math.random() * 50 + 1960);
}
private String getRandomModel() {
return UUID.randomUUID().toString().substring(0, 8);
}
}
這裏的XHTML：
<?xml version="1.0" encoding="UTF-8"?>
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui" template="template-default.xhtml">
<ui:define name="content">
<h:form>
<p:dataTable var="car" value="#{lazyTableBean.lazyModel}"
paginator="true" rows="10" lazy="true"
paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} {CurrentPageReport} {NextPageLink} {LastPageLink}"
rowsPerPageTemplate="5,10,15"
selection="#{lazyTableBean.selectedCar}" selectionMode="single">
<p:ajax event="rowSelect"
listener="#{lazyTableBean.onRowSelect}" update=":form:display"
oncomplete="carDialog.show()" />
<p:column headerText="Model">
<h:outputText value="#{car.model}" />
</p:column>
<p:column headerText="Year">
<h:outputText value="#{car.year}" />
</p:column>
<p:column headerText="Manufacturer">
<h:outputText value="#{car.manufacturer}" />
</p:column>
<p:column headerText="Color">
<h:outputText value="#{car.color}" />
</p:column>
</p:dataTable>
<p:dialog header="Car Detail" widgetVar="carDialog"
resizable="false" width="200" showEffect="explode"
hideEffect="explode">
<h:panelGrid id="display" columns="2" cellpadding="4">
<f:facet name="header">
<p:graphicImage
value="/images/cars/#{lazyTableBean.selectedCar.manufacturer}.jpg" />
</f:facet>
<h:outputText value="Model:" />
<h:outputText value="#{lazyTableBean.selectedCar.model}" />
<h:outputText value="Year:" />
<h:outputText value="#{lazyTableBean.selectedCar.year}" />
<h:outputText value="Manufacturer:" />
<h:outputText
value="#{lazyTableBean.selectedCar.manufacturer}" />
<h:outputText value="Color:" />
<h:outputText value="#{lazyTableBean.selectedCar.color}" />
</h:panelGrid>
</p:dialog>
</h:form>
</ui:define>
</ui:composition>