我正在使用javafx构建桌面应用。 我的fxml文件是： -
use warnings;
use strict;
open my $fh1, "<", "f1.txt" or die"$!";
my @ar = <$fh1>;
my $exculed = join("|",@ar);
$exculed=~ s/\n|\s//g; #your input have some spaces so i used substitution instead of chomp
open my $fh2, "<", "f2.txt";
open my $nw, ">", "newfile.txt";
my @br = <$fh2>;
@br = grep{!/$exculed/g} @br if ($exculed ne "");
print $nw @br;
我的下载按钮控制器类是： -
<?import java.lang.String?>
<?import javafx.collections.FXCollections?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ComboBox?>
<?import javafx.scene.control.ProgressBar?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" xmlns="http://javafx.com/javafx/8.0.65" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ch.Buildsapp.Main.BuildsController" fx:id="ap">
<children>
<HBox alignment="CENTER_LEFT" layoutX="6.0" layoutY="14.0" spacing="20.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<ComboBox fx:id="versionCombo" prefHeight="31.0" prefWidth="108.0" promptText="7.0 Win">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="Win" />
<String fx:value="Mac" />
</FXCollections>
</items>
<value>
<String fx:value="Win" />
</value>
</ComboBox>
<ComboBox fx:id="versionNo" prefHeight="31.0" prefWidth="89.0" promptText="7.0" />
<Button fx:id="downloadButton" minWidth="80.0" mnemonicParsing="false" text="Download" />
<Button fx:id="installButton" minWidth="80.0" mnemonicParsing="false" text="Install" />
<ComboBox fx:id="locCombo" prefHeight="31.0" prefWidth="103.0">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="CJ" />
<String fx:value="MN" />
</FXCollections>
</items>
<value>
<String fx:value="CJ" />
</value>
</ComboBox>
<ProgressBar fx:id="progressBar1" prefHeight="23.0" prefWidth="102.0" progress="0.0" />
</children>
<padding>
<Insets left="10.0" right="3.0" top="5.0" />
</padding>
</HBox>
<TableView fx:id="tableView" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="2.0" AnchorPane.rightAnchor="2.0" AnchorPane.topAnchor="40.0">
<columns>
<TableColumn fx:id="builds" prefWidth="482.0" text="Builds" />
<TableColumn fx:id="date" minWidth="0.0" prefWidth="124.0" text="Date" />
<TableColumn fx:id="release" prefWidth="168.0" text="Release" />
</columns>
</TableView>
</children>
</AnchorPane>
下载方法如下。
downloadButton.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
download();
}
});
我的进度条形码是： -
private void download() {
FTPClient ftpClient = new FTPConnection().makeConnection(loc);
try {
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
success = ftpClient.changeWorkingDirectory(PATH + preset + "/" + file_to_download + offset);
System.out.println("Download Path:-" + PATH + preset + "/" + file_to_download + offset);
if (!success) {
System.out.println("Could not changed the directory to RIBS");
return;
} else {
System.out.println("Directory changed to RIBS");
}
FTPFile[] files = ftpClient.listFiles();
for (FTPFile file : files) {
if (file.getName().contains(".zip")) {
dfile = file.getName();
}
}
fileMap.put("build", dfile);
primaryStage = (Stage) ap.getScene().getWindow();
String homePath = System.getProperty("user.home");
File downloadPath = new File(homePath + "\\LightroomBuildss\\" + osVer);
if (!downloadPath.exists()) {
if (downloadPath.mkdirs()) {
System.out.println("Directory is created!");
} else {
System.out.println("Failed to create directory!");
}
}
// System.out.println(chosenDir.getAbsolutePath());
filePath = new File(downloadPath + "/" + dfile);
if (filePath.exists()) {
System.out.println("File altready exist");
return;
} else {
fileMap.put("path", filePath.toString());
fileMap.put("kind", "RIBS");
Task task = new Task<Void>() {
@Override
public Void call() throws IOException {
try {
output = new FileOutputStream(downloadPath + "/" + dfile);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ftpClient.sendNoOp();
ftpClient.setConnectTimeout(1000);
Task<Void> sleeper = new Task<Void>() {
@Override
protected Void call() throws Exception {
try {
for (double progress = 0.0; progress < 100.0; progress++) {
Thread.sleep(100);
updateProgress(progress, 100);
System.out.println(progress);
}
} catch (InterruptedException e) {
}
return null;
}
};
ProgressBar slider = startProgressBar();
slider.progressProperty().bind(sleeper.progressProperty());
Thread thread = new Thread(sleeper);
thread.start();
if (ftpClient.retrieveFile(dfile, output) == true) {
downloadButton.setDisable(true);
outsize = dfile.length();
}
return null;
}
};
Thread t = new Thread(task);
t.start();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (output != null) {
try {
output.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
我在下载开始之前从下载方法调用startProgessBar方法，但在调用该方法之后，进度条没有启动，并且在方法调用之后写入的代码（在这种情况下禁用下载按钮）也没有虽然在所需的文件夹中下载了版本，但仍然会执行。如果startProgressBar方法在代码工作正常后没有被调用。
答案 0 :(得分：0)
检查这些。
primaryStage=//this is global
primaryStage= (Stage) ap.getScene().getWindow();//why do this?
//i guess its simply primaryStage = primaryStage
也
Scene scene = new Scene(root);//scene already has a root
scene.setRoot(hb);//why do this?
//if you do not need the Group, why set it to your scene
也
(Stage) ap.getScene().getWindow();//this a.k.a primaryStage is already shown
primaryStage.show();//this isn't needed as your last line.
以上这些并不能解决您的问题，但这可以借助上述
来解决startProggressBar();
if (ftpClient.retrieveFile(dfile, output) == true) {
downloadButton.setDisable(true);//this guy is an orphan.
outsize = dfile.length();
}
//when startProggressBar(); is done your primaryStage's Scene is changed
希望它有用
答案 1 :(得分：0)
有很多错误。首先，不要在任务中放置进度指示器的窗口设置。设置它，然后定义任务并运行它。
我看不到任务进度和屏幕之间的任何关联。
根据它的valueProperty修改滑块似乎不会让它在屏幕上更新。最好通过绑定直接链接到ProgressBar。
这里有一些简单的代码可以完成你正在寻找的东西，在任务中使用虚拟操作而不是下载：
public class SampleTask extends Application {
private BorderPane testPane;
class TestPane extends BorderPane {
public TestPane() {
Button button = new Button("Click Here");
setCenter(button);
button.setOnAction(evt -> {
Task<Void> sleeper = new Task<Void>() {
@Override
protected Void call() throws Exception {
try {
for (double progress = 0.0; progress < 100.0; progress++) {
Thread.sleep(100);
updateProgress(progress, 100);
System.out.println(progress);
}
} catch (InterruptedException e) {
}
return null;
}
};
ProgressBar slider = startProgressBar();
slider.progressProperty().bind(sleeper.progressProperty());
Thread thread = new Thread(sleeper);
thread.start();
});
}
}
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Task Progress Tester");
testPane = new TestPane();
primaryStage.setScene(new Scene(testPane, 300, 250));
primaryStage.show();
}
public ProgressBar startProgressBar() {
Stage primaryStage = new Stage();
ProgressBar pb = new ProgressBar(0);
ProgressIndicator pi = new ProgressIndicator(0);
pi.progressProperty().bind(pb.progressProperty());
HBox hb = new HBox();
hb.setSpacing(5);
hb.setAlignment(Pos.CENTER);
hb.getChildren().addAll(pb, pi);
Scene scene = new Scene(hb, 300, 100);
primaryStage.setScene(scene);
primaryStage.show();
return pb;
}
}