java在状态更改时删除TableView条目
我在试图找出如何使TableView
根据每个条目响应状态显示正确的数据时遇到了一个问题。我原以为FilteredList
能完成这项工作,但事实并非如此。基本上,我是在检查URL并获取它们的状态码。我正在使用FilteredList
来显示所有挂起的、成功的URL,等等。如果我将ChoiceBox
从All
更改为Pending
,那么FilteredList
只显示挂起的URL,但是当URL更改为Success
或其他内容时,^Pending
时,任何接收到状态更改的URL都应该从当前视图中删除。如何让FilteredList/TableView
进行实时更新
Main
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
/**
*
* @author blj0011
*/
public class JavaFXApplication240 extends Application
{
@Override
public void start(Stage stage) throws Exception
{
Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args)
{
launch(args);
}
}
控制器
import com.sun.javafx.application.HostServicesDelegate;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
import java.util.ResourceBundle;
import java.util.Scanner;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.collections.transformation.FilteredList;
import javafx.concurrent.Task;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.ChoiceBox;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import org.apache.http.client.config.CookieSpecs;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.client.LaxRedirectStrategy;
/**
*
* @author blj0011
*/
public class FXMLDocumentController implements Initializable
{
@FXML
private Button btnProcess;
@FXML
private TableView<Model> tvMain;
@FXML
private TableColumn<Model, String> tcBibId, tcHoldingId, tcUrl, tcStatus;
@FXML
private TableColumn<Model, Integer> tcId;
@FXML
private ChoiceBox<String> cbMain;
private final ObservableList<Model> masterData = FXCollections.observableArrayList();
FilteredList<Model> filteredData;
HostServicesDelegate hostServicesDelegate;
AtomicInteger processUrlCounter;
int tableViewSize = -1;
AtomicInteger seconds = new AtomicInteger();
@Override
public void initialize(URL url, ResourceBundle rb)
{
// TODO
processUrlCounter = new AtomicInteger();
setupChoiceBox();
setupTableView();
btnProcess.setOnAction((event) -> {
btnProcess.setDisable(true);
List<Task<String>> tasks = new ArrayList();
tvMain.getItems().forEach((t) -> {
Model tempModel = (Model) t;
tasks.add(processUrl(tempModel));
});
tasks.forEach(exec::execute);
});
}
private List<Model> getTestData()
{
List<Model> testList = new ArrayList();
Random random = new Random();
try (Scanner input = new Scanner(new File("testdata.txt"))) {
while (input.hasNext()) {
Model tempModel = new Model(Integer.toString(random.nextInt(100000) + 100000), Integer.toString(random.nextInt(100000) + 100000), input.next());
testList.add(tempModel);
System.out.println(tempModel.toString());
}
}
catch (FileNotFoundException ex) {
Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex);
}
return testList;
}
private void setupChoiceBox()
{
List<String> STATUS_LIST = Arrays.asList("ALL", "PENDING", "SUCCESS");
cbMain.getItems().addAll(STATUS_LIST);
cbMain.getSelectionModel().selectFirst();
cbMain.getSelectionModel().selectedItemProperty().addListener((obs, oldVal, newVal)
-> {
List<Model> tempList = new ArrayList();
switch (newVal) {
case "ALL":
tempList = tvMain.getItems();
filteredData.setPredicate(null);
break;
case "PENDING":
filteredData.setPredicate((t) -> {
return t.getStatus().trim().equals("PENDING");
});
tempList = tvMain.getItems().filtered((t) -> {
return t.getStatus().equals("PENDING");
});
break;
case "SUCCESS":
filteredData.setPredicate((t) -> {
return t.getStatus().trim().matches("2\\d\\d");
});
tempList = tvMain.getItems().filtered((t) -> {
return t.getStatus().matches("2\\d\\d");
});
break;
}
});
}
private void setupTableView()
{
tcId.setCellValueFactory(new PropertyValueFactory("id"));
tcBibId.setCellValueFactory(cell -> cell.getValue().bibIdProperty());
tcHoldingId.setCellValueFactory(cell -> cell.getValue().holdingIdProperty());
tcUrl.setCellValueFactory(cell -> cell.getValue().urlProperty());
tcStatus.setCellValueFactory(cell -> cell.getValue().statusProperty());
masterData.setAll(getTestData());
filteredData = new FilteredList(masterData, null);
tvMain.setItems(filteredData);
tableViewSize = masterData.size();
}
private final ExecutorService exec = Executors.newFixedThreadPool(2500, r -> {
Thread t = new Thread(r);
t.setDaemon(true);
return t;
});
private Task<String> processUrl(Model model)
{
Task<String> task = new Task<String>()
{
@Override
protected String call() throws Exception
{
CloseableHttpClient httpclient = HttpClients.custom().setDefaultRequestConfig(RequestConfig.custom().setCookieSpec(CookieSpecs.STANDARD).build()).setRedirectStrategy(new LaxRedirectStrategy()).build();
HttpGet httpGet = new HttpGet(model.getUrl());
try (CloseableHttpResponse response1 = httpclient.execute(httpGet)) {
String tempResponse = response1.getStatusLine().toString().split(" ")[1];
return tempResponse;
}
catch (IOException ex) {
String tempString = ex.getClass().toString().split(" ")[1];
String[] tempException = tempString.split("\\.");
return tempException[tempException.length - 1];
}
}
};
task.setOnSucceeded((event) -> {
model.setStatus(task.getValue());
if (processUrlCounter.incrementAndGet() == tableViewSize) {
btnProcess.setDisable(false);
}
String tempOutput = "Processed URLs: " + processUrlCounter.get() + " of " + tableViewSize;
});
return task;
}
}
FXML
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ChoiceBox?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.VBox?>
<VBox alignment="CENTER" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="862.0" prefWidth="748.0" spacing="10.0" xmlns="http://javafx.com/javafx/8.0.141" xmlns:fx="http://javafx.com/fxml/1" fx:controller="javafxapplication240.FXMLDocumentController">
<children>
<ChoiceBox fx:id="cbMain" prefWidth="150.0" />
<TableView fx:id="tvMain" prefHeight="200.0" prefWidth="200.0" VBox.vgrow="ALWAYS">
<columns>
<TableColumn fx:id="tcId" prefWidth="85.0" text="ID" />
<TableColumn fx:id="tcBibId" prefWidth="102.0" text="Bib ID" />
<TableColumn fx:id="tcHoldingId" prefWidth="113.0" text="Holding ID" />
<TableColumn fx:id="tcUrl" prefWidth="313.0" text="URL" />
<TableColumn fx:id="tcStatus" prefWidth="132.0" text="Status" />
</columns>
</TableView>
<Button fx:id="btnProcess" mnemonicParsing="false" text="Process" />
</children>
<padding>
<Insets bottom="10.0" top="10.0" />
</padding>
</VBox>
模型类
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
/**
*
* @author Sedrick
*/
public class Model
{
final private IntegerProperty id = new SimpleIntegerProperty();
final private StringProperty bibId = new SimpleStringProperty();
final private StringProperty holdingId = new SimpleStringProperty();
final private StringProperty url = new SimpleStringProperty();
final private StringProperty status = new SimpleStringProperty();
public Model(int id, String bibId, String holdingID, String url)
{
this.id.set(id);
this.bibId.set(bibId);
this.holdingId.set(holdingID);
this.url.set(url);
this.status.set("PENDING");
}
public Model(String bibId, String holdingId, String url)
{
this.id.set(-1);
this.bibId.set(bibId);
this.holdingId.set(holdingId);
this.url.set(url);
this.status.set("PENDING");
}
public IntegerProperty idProperty()
{
return this.id;
}
public StringProperty bibIdProperty()
{
return this.bibId;
}
public StringProperty holdingIdProperty()
{
return this.holdingId;
}
public StringProperty urlProperty()
{
return this.url;
}
public StringProperty statusProperty()
{
return this.status;
}
public void setId(int id)
{
this.id.set(id);
}
public void setBibId(String bibId)
{
this.bibId.set(bibId);
}
public void setHoldingId(String holdingId)
{
this.holdingId.set(holdingId);
}
public void setUrl(String url)
{
this.url.set(url);
}
public void setStatus(String status)
{
this.status.set(status);
}
public int getId()
{
return id.get();
}
public String getBibId()
{
return bibId.get();
}
public String getHoldingId()
{
return holdingId.get();
}
public String getUrl()
{
return url.get();
}
public String getStatus()
{
return status.get();
}
@Override
public String toString()
{
return getId() + ": " + getBibId() + " - " + getHoldingId() + " - " + getUrl();
}
}
该程序使用^{
URL列表
http://www.youtube.com
http://www.facebook.com
http://www.baidu.com
http://www.yahoo.com
http://www.amazon.com
http://www.wikipedia.org
http://www.qq.com
http://www.google.co.in
http://www.twitter.com
http://www.live.com
http://www.taobao.com
http://www.bing.com
http://www.instagram.com
http://www.weibo.com
http://www.sina.com.cn
http://www.linkedin.com
http://www.yahoo.co.jp
http://www.msn.com
http://www.vk.com
http://www.google.de
http://www.yandex.ru
http://www.hao123.com
http://www.google.co.uk
http://www.reddit.com
http://www.ebay.com
http://www.google.fr
http://www.t.co
http://www.tmall.com
http://www.google.com.br
http://www.360.cn
http://www.sohu.com
http://www.amazon.co.jp
http://www.pinterest.com
http://www.netflix.com
http://www.google.it
http://www.google.ru
http://www.microsoft.com
http://www.google.es
http://www.wordpress.com
http://www.gmw.cn
http://www.tumblr.com
http://www.paypal.com
http://www.blogspot.com
http://www.imgur.com
http://www.stackoverflow.com
http://www.aliexpress.com
http://www.naver.com
http://www.ok.ru
http://www.apple.com
http://www.github.com
http://www.chinadaily.com.cn
http://www.imdb.com
http://www.google.co.kr
http://www.fc2.com
http://www.jd.com
http://www.blogger.com
http://www.163.com
http://www.google.ca
http://www.whatsapp.com
http://www.amazon.in
http://www.office.com
http://www.tianya.cn
http://www.google.co.id
http://www.youku.com
http://www.rakuten.co.jp
http://www.craigslist.org
http://www.amazon.de
http://www.nicovideo.jp
http://www.google.pl
http://www.soso.com
http://www.bilibili.com
http://www.dropbox.com
http://www.xinhuanet.com
http://www.outbrain.com
http://www.pixnet.net
http://www.alibaba.com
http://www.alipay.com
http://www.microsoftonline.com
http://www.booking.com
http://www.googleusercontent.com
http://www.google.com.au
http://www.popads.net
http://www.cntv.cn
http://www.zhihu.com
http://www.amazon.co.uk
http://www.diply.com
http://www.coccoc.com
http://www.cnn.com
http://www.bbc.co.uk
http://www.twitch.tv
http://www.wikia.com
http://www.google.co.th
http://www.go.com
http://www.google.com.ph
http://www.doubleclick.net
http://www.onet.pl
http://www.googleadservices.com
http://www.accuweather.com
http://www.googleweblight.com
http://www.answers.yahoo.com
http://www.youtube.com
http://www.facebook.com
http://www.baidu.com
http://www.yahoo.com
http://www.amazon.com
http://www.wikipedia.org
http://www.qq.com
http://www.google.co.in
http://www.twitter.com
http://www.live.com
http://www.taobao.com
http://www.bing.com
http://www.instagram.com
http://www.weibo.com
http://www.sina.com.cn
http://www.linkedin.com
http://www.yahoo.co.jp
http://www.msn.com
http://www.vk.com
http://www.google.de
http://www.yandex.ru
http://www.hao123.com
http://www.google.co.uk
http://www.reddit.com
http://www.ebay.com
http://www.google.fr
http://www.t.co
http://www.tmall.com
http://www.google.com.br
http://www.360.cn
http://www.sohu.com
http://www.amazon.co.jp
http://www.pinterest.com
http://www.netflix.com
http://www.google.it
http://www.google.ru
http://www.microsoft.com
http://www.google.es
http://www.wordpress.com
http://www.gmw.cn
http://www.tumblr.com
http://www.paypal.com
http://www.blogspot.com
http://www.imgur.com
http://www.stackoverflow.com
http://www.aliexpress.com
http://www.naver.com
http://www.ok.ru
http://www.apple.com
http://www.github.com
http://www.chinadaily.com.cn
http://www.imdb.com
http://www.google.co.kr
http://www.fc2.com
http://www.jd.com
http://www.blogger.com
http://www.163.com
http://www.google.ca
如果程序以fast结尾,则可能需要在列表中循环几次
# 1 楼答案
每当一个}
FilteredList
的Predicate
发生变化或时,只要它检测到源ObservableList
发生变化,FilteredList
就会更新。要激发的事件类型是update事件。此事件表示一个或多个元素已更新(例如,当属性更改时)。为了做到这一点,您必须使用适当的工厂方法来构造ObservableList
:^{这个工厂方法接受一个^{} ,它接受
ObservableList
的一个元素,并返回一个Observable[]
。将监听数组中的Observable
以查找无效事件,当检测到时,将导致ObservableList
触发更新更改从你的代码来看,1就像
Model
类有一个status
属性。如果要在status
更改时触发更新,则应使用:如果您希望为
status
属性的更改触发更新,那么可以向数组中添加更多Observable
现在,当
status
属性更改时,FilteredList
将注意到并过滤元素(如果需要)1。当我写这个答案时,你还没有发布
Model
类。然而,我设法从可用代码中对其进行“逆向工程”,并使用Callback
提取器对其进行了测试。当status
从挂起状态更改为新状态时,元素从FilteredList
中删除,从而从TableView
中删除