jsf - 方法完成过程后更改 Primefaces 命令按钮禁用状态
问题描述
我有一个页面，其中 <p:commandButton> 用于开始搜索。搜索完成后，它会刷新一个<p:gmap>和一个 dataTable。同时，我创建了一个包含搜索详细信息的文本文件。我想在页面末尾为此文件创建一个下载按钮。
但是，生成文件需要时间。如果用户在该过程完成之前单击按钮，他将收到 HTTP 404 错误。我试图仅在创建文件时启用下载按钮，但我不知道如何仅在文件完成时将下载按钮中的禁用属性从 true 切换为 false。可能吗？
我已经尝试过这里描述的解决方案，但没有奏效。
网页
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition template="template.xhtml"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:p="http://primefaces.org/ui"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets">
<ui:define name="menuDireito">
<f:view transient="true">
<script src="https://maps.google.com/maps/api/js?sensor=false"></script>
<h:form id="form">
<br></br>
<p:selectOneMenu immediate="true" value="#{circlesView.selectedCategory}" converter="categoriaConverter" panelStyle="width:150px"
effect="fade" var="p" style="width:200px" filter="true" filterMatchMode="startsWith">
<f:selectItem itemLabel="Selecione o Estabelecimento" itemValue="" />
<f:selectItems value="#{autoCompleteCategoria.categories}" var="category" itemLabel="#{category}" itemValue="#{category}"/>
<p:column>
#{p}
</p:column>
</p:selectOneMenu>
<br></br><br></br>
<div style="text-align: left">Indique a área de busca:</div>
<p:inputText id="range" value="#{circlesView.range}" />
<p:watermark for="range" value="Ex: 1000" id="watermark" />
<br></br><br></br>
<div style="text-align: center">
<p:commandButton icon="fa fa-fw fa-search" style="width:150px !important; height: 30px !important;" ajax="false" process="@all" value="Pesquisar" action="#{circlesView.filteredQuery()}" update="dataTable" oncomplete="PF('dlg').show()" />
</div>
<br></br><br></br>
<p:separator style="margin-bottom:10px"/>
<p:gmap id="gmap" center="-23.5569834, -46.6362086" zoom="13" type="HYBRID" style="width:100%;height:400px" model="#{circlesView.circleModel}">
</p:gmap>
<p:separator style="margin-bottom:10px"/>
<h3>Resultados</h3>
<p:dataTable id="basicDT" var="obj" value="#{circlesView.objs}">
<f:facet name="header">
Locais com infectados na vizinhança
</f:facet>
<p:column style="text-align: center" headerText="Nome">
<h:outputText value="#{obj.name}" />
</p:column>
<p:column style="text-align: center" headerText="# pessoas">
<h:outputText value="#{obj.score}" />
</p:column>
<p:column style="text-align: center" headerText="Visualizar">
<p:commandButton update=":form:localDetail" oncomplete="PF('mapDialog').show()" icon="ui-icon-search" title="View">
<f:setPropertyActionListener value="#{obj}" target="#{circlesView.selectedObj}" />
</p:commandButton>
</p:column>
<p:column style="text-align: center" headerText="Visualizar">
<p:commandButton update=":form:nDetail" oncomplete="PF('ndialog').show()" icon="ui-icon-search" title="View">
<f:setPropertyActionListener value="#{obj}" target="#{circlesView.selectedObj}" />
</p:commandButton>
</p:column>
</p:dataTable>
<p:dialog header="Local Position" widgetVar="mapDialog" modal="true" showEffect="fade" hideEffect="fade" resizable="false" width="625" height="400">
<p:outputPanel id="localDetail" style="text-align:center;">
<p:panelGrid rendered="#{not empty circlesView.selectedObj}" >
<p:gmap id="gmap2" center="#{circlesView.selectedObj.coordPattern}" zoom="14" type="HYBRID" style="width:100%;height:400px" model="#{circlesView.selectedObj.mapModel}"/>
</p:panelGrid>
</p:outputPanel>
</p:dialog>
<p:dialog header="Neighborhood Info" widgetVar="nDialog" modal="true" showEffect="fade" hideEffect="fade" resizable="false">
<p:outputPanel id="nDetail" style="text-align:center;">
<p:panelGrid columns="2" rendered="#{not empty dtSelectionView.selectedCar}" columnClasses="label,value">
<h:outputText value="Id:" />
<h:outputText value="#{circlesView.selectedObj.id}" />
<h:outputText value="Dist" />
<h:outputText value="#{circlesView.selectedObj.distancia}" />
</p:panelGrid>
</p:outputPanel>
</p:dialog>
</h:form>
<br></br>
<h:form id="downloadForm">
<p:commandButton action="#{circlesView.downloadAction()}" value="Download" ajax="false" icon="fa fa-fw fa-download" disabled="#{circlesView.disable}">
<p:fileDownload value="#{circlesView.file}" />
</p:commandButton>
</h:form>
</f:view>
</ui:define>
</ui:composition>
豆
@ManagedBean(name = "circlesView")
@SessionScoped
public class PreferenceQuery implements Serializable {
private MapModel circleModel;
private String path;
private String contentType;
private boolean disable;
Integer range;
Properties properties;
DefaultStatisticCenter statistics;
Integer k = 20;
List<ScoredObjectMarked> objs;
ScoredObjectMarked selectedObj;
String selectedCategory;
private static final long serialVersionUID = 1L;
public PreferenceQuery() {
disable = true;
}
public List<ScoredObjectMarked> query() throws FileNotFoundException, UnsupportedEncodingException, IOException {
disable = true;
objs = new ArrayList<ScoredObjectMarked>();
statistics = new DefaultStatisticCenter();
try {
properties = Settings.myLoadProperties(new File("D:\\Documents\\GitHub\\COVID-Geo-Monitoring\\web\\search.properties"));
} catch (IOException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
//Converte para radius
double radius = (180 * range) / (6378137.0 * Math.PI);
PreferenceFileTermManager fileTermManager = createPreferenceFileTermManager();
PreferenceTreeTermManager treeTermManager = createPreferenceTreeTermManager();
PreferenceIndex prefIndex = createPreferenceSpatialInvertedIndex(fileTermManager, treeTermManager, false);
StarRTree rTree = null;
try {
rTree = createRtree(null);
} catch (IOException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
} catch (ClassNotFoundException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
try {
prefIndex.open();
} catch (SSEExeption ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
} catch (ColumnFileException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
} catch (ClassNotFoundException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
PreferenceSearch experiment = new PreferenceSearch(statistics,
false,
prefIndex.getTermVocabulary(),
1,
k,
1,
0.5 /*alfa*/,
Double.parseDouble(properties.getProperty("dataset.spaceMaxValue")),
0,
selectedCategory,
prefIndex, rTree,
3,
true,
radius);
try {
experiment.open();
} catch (ExperimentException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
Iterator<SpatioTextualObject> result = null;
try {
result = experiment.search("patient", 20);
} catch (ExperimentException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
while (result.hasNext()) {
ScoredObject p = (ScoredObject) result.next();
ScoredObjectMarked p_model = new ScoredObjectMarked(p.getId(), p.getLatitude(), p.getLongitude(), range, p.getMessage());
p_model.setScore(p.getScore());
objs.add(p_model);
}
try {
experiment.close();
} catch (ExperimentException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
circleModel = new DefaultMapModel();
for (int a = 0; a < objs.size() && a < k; a++) {
ScoredObject poi = objs.get(a);
LatLng coords = new LatLng(poi.getLatitude(), poi.getLongitude());
Circle circle = new Circle(coords, range);
circle.setStrokeColor("#d93c3c");
circle.setFillColor("#d93c3c");
circle.setFillOpacity(0.5);
circleModel.addOverlay(circle);
}
reportFeatures();
disable = false;
return objs;
}
public void downloadAction() {
path = "D:\\Documents\\GitHub\\COVID-Geo-Monitoring\\src\\java\\query\\fullReport.txt";
contentType = FacesContext.getCurrentInstance().getExternalContext().getMimeType(path);
}
public StreamedContent getFile() throws FileNotFoundException {
return new DefaultStreamedContent(new FileInputStream("D:\\Documents\\GitHub\\COVID-Geo-Monitoring\\src\\java\\query\\fullReport.txt"), contentType, "Report.txt");
}
public void reportFeatures() throws FileNotFoundException, UnsupportedEncodingException, IOException {
Writer output = new OutputStreamWriter(new FileOutputStream("D:\\Documents\\GitHub\\COVID-Geo-Monitoring\\src\\java\\query\\fullReport.txt", false), "ISO-8859-1");
for (ScoredObjectMarked poi : objs) {
output.write("Pacientes próximos ao " + poi.getName() + "\n\n");
SpatioItemCollection collection = poi.getNN();
Iterator colIt = collection.iterator();
while (colIt.hasNext()) {
SpatioItem paciente = (SpatioItem) colIt.next();
output.write("\t Paciente " + paciente.getId() + ": (" + paciente.getLatitude() + ", " + paciente.getLongitude() + ") "
+ "Distância para o Hospital: " + paciente.getDistancia() + "\n");
}
output.write("\n");
output.flush();
}
output.close();
}
public List<ScoredObjectMarked> filteredQuery() throws IOException, FileNotFoundException, ClassNotFoundException, SSEExeption, ColumnFileException {
objs = new ArrayList<ScoredObjectMarked>();
statistics = new DefaultStatisticCenter();
try {
properties = Settings.myLoadProperties(new File("D:\\Documents\\GitHub\\COVID-Geo-Monitoring\\web\\search.properties"));
} catch (IOException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
//Converte para radius
double radius = (180 * range) / (6378137.0 * Math.PI);
PreferenceFileTermManager fileTermManager = createPreferenceFileTermManager();
PreferenceTreeTermManager treeTermManager = createPreferenceTreeTermManager();
PreferenceIndex prefIndex = createPreferenceSpatialInvertedIndex(fileTermManager, treeTermManager, false);
StarRTree rTree = createRtree(selectedCategory);
prefIndex.open();
PreferenceSearch experiment = new PreferenceSearch(statistics,
false,
prefIndex.getTermVocabulary(),
1,
k,
1,
0.5 /*alfa*/,
Double.parseDouble(properties.getProperty("dataset.spaceMaxValue")),
0,
selectedCategory,
prefIndex, rTree,
3,
true,
radius);
try {
experiment.open();
} catch (ExperimentException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
Iterator<SpatioTextualObject> result = null;
try {
result = experiment.search("patient", k);
} catch (ExperimentException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
while (result.hasNext()) {
ScoredObject p = (ScoredObject) result.next();
ScoredObjectMarked p_model = new ScoredObjectMarked(p.getId(), p.getLatitude(), p.getLongitude(), range, p.getMessage());
p_model.setScore(p.getScore());
p_model.setNN(p.getNN());
objs.add(p_model);
}
try {
experiment.close();
} catch (ExperimentException ex) {
Logger.getLogger(PreferenceQuery.class.getName()).log(Level.SEVERE, null, ex);
}
circleModel = new DefaultMapModel();
for (int a = 0; a < objs.size() && a < k; a++) {
ScoredObject poi = objs.get(a);
LatLng coords = new LatLng(poi.getLatitude(), poi.getLongitude());
Circle circle = new Circle(coords, range);
circle.setStrokeColor("#d93c3c");
circle.setFillColor("#d93c3c");
circle.setFillOpacity(0.5);
circleModel.addOverlay(circle);
}
reportFeatures();
disable = false;
return objs;
}
public boolean getDisable() {
return disable;
}
public void setDisable(boolean disable) {
this.disable = disable;
}
public List<ScoredObjectMarked> getObjs() {
return objs;
}
public void setObjs(List<ScoredObjectMarked> objs) {
this.objs = objs;
}
public MapModel getCircleModel() {
return circleModel;
}
public void onCircleSelect(OverlaySelectEvent event) {
FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "Circle Selected", null));
}
public Integer getRange() {
return range;
}
public void setRange(Integer range) {
this.range = range;
}
public ScoredObject getSelectedObj() {
return selectedObj;
}
public void setSelectedObj(ScoredObjectMarked selectedObj) {
this.selectedObj = selectedObj;
}
public String getSelectedCategory() {
return selectedCategory;
}
public void setSelectedCategory(String selectedCategory) {
this.selectedCategory = selectedCategory;
}
private StarRTree createRtree(String poi) throws FileNotFoundException, IOException, ClassNotFoundException {
if (poi == null) {
poi = "Sao Paulo";
selectedCategory = "Sao Paulo";
}
Path path = Paths.get(properties.getProperty("experiment.folder") + "\\rtrees\\" + selectedCategory);
Files.createDirectories(path);
StarRTree rTree = new StarRTree(statistics, "", properties.getProperty("experiment.folder") + "\\rtrees\\" + selectedCategory + "\\rtree",
Integer.parseInt(properties.getProperty("srtree.dimensions")),
Integer.parseInt(properties.getProperty("srtree.cacheSize")),
Integer.parseInt(properties.getProperty("disk.blockSize")),
Integer.parseInt(properties.getProperty("srtree.minNodeCapacity")),
Integer.parseInt(properties.getProperty("srtree.maxNodeCapacity")));
System.out.println("POI: " + poi);
LoadRTree.load(rTree, "D:\\Documents\\GitHub\\COVID-Geo-Monitoring\\web\\Categorias\\" + poi + ".txt");
return rTree;
}
private PreferenceIndex createPreferenceSpatialInvertedIndex(PreferenceFileTermManager fileTermManager,
PreferenceTreeTermManager treeTermManager, boolean constructionTime) {
return new PreferenceIndex(statistics,
properties.getProperty("experiment.folder"),
Integer.parseInt(properties.getProperty("disk.blockSize")),
100,
fileTermManager, treeTermManager,
constructionTime);
}
private PreferenceTreeTermManager createPreferenceTreeTermManager() {
return new PreferenceTreeTermManager(statistics, properties.getProperty("experiment.folder"),
Integer.parseInt(properties.getProperty("srtree.dimensions")),
Integer.parseInt(properties.getProperty("srtree.cacheSize")),
Integer.parseInt(properties.getProperty("disk.blockSize")),
Integer.parseInt(properties.getProperty("srtree.minNodeCapacity")),
Integer.parseInt(properties.getProperty("srtree.maxNodeCapacity")),
100);
}
private PreferenceFileTermManager createPreferenceFileTermManager() {
return new PreferenceFileTermManager(statistics,
Integer.parseInt(properties.getProperty("disk.blockSize")),
properties.getProperty("experiment.folder") + "/s2i",
Integer.parseInt(properties.getProperty("srtree.cacheSize")));
}
}
解决方案
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