参考文档
https://wiki.openjdk.java.net/display/OpenJFX/Main
https://openjfx.io/javadoc/11/
https://openjfx.io/javadoc/11/javafx.graphics/javafx/concurrent/package-summary.html
案例分析
文中以一个文件下载作为案例介绍，看代码即可明了
- Task
package com.hc.demo;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Task;
import javafx.concurrent.Worker;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressBar;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
/**
* @author stone
*/
public class MyApp extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setTitle("Hello World!");
HBox hBox=new HBox(10);
Button startBtn = new Button("开始");
Button cancelBtn = new Button("取消");
Button resetBtn = new Button("重置");
Button restartBtn = new Button("重启");
ProgressBar progressBar = new ProgressBar(0);
progressBar.setPrefWidth(200);
Label l1=new Label("state");
Label l2=new Label("value");
Label l3=new Label("title");
Label l4=new Label("message");
FlowPane root = new FlowPane();
hBox.getChildren().addAll(startBtn,cancelBtn,resetBtn,restartBtn,progressBar,l1,l2,l3,l4);
root.getChildren().add(hBox);
primaryStage.setScene(new Scene(root, 700, 300));
primaryStage.show();
MyTask myTask=new MyTask();
Thread thread=new Thread(myTask);
startBtn.setOnAction(event -> thread.start());
cancelBtn.setOnAction(event ->
myTask.cancel()
);
myTask.progressProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Number oldValue, Number newValue) {
progressBar.setProgress(newValue.doubleValue());
}
});
myTask.titleProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, String oldValue, String newValue) {
l3.setText(newValue);
}
});
myTask.valueProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Number oldValue, Number newValue) {
if(newValue.doubleValue()==1){
l2.setText("完成");
}
}
});
myTask.messageProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, String oldValue, String newValue) {
l4.setText(newValue);
}
});
//wordkDone指的是进度
myTask.stateProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Worker.State oldValue, Worker.State newValue) {
l1.setText(newValue.toString());
}
});
//异常监听 监听现在状态是否有异常并打印
myTask.exceptionProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Throwable oldValue, Throwable newValue) {
System.out.println(newValue);
}
});
}
public static void main(String[] args) {
launch(args);
}
}
class MyTask extends Task
{
public MyTask() {
super();
}
@Override
protected Number call() throws Exception {
this.updateTitle("copy");
FileInputStream fis=new FileInputStream(new File("C:\\Users\\nrgh\\Desktop\\区块链\\porep时空证明.pdf"));
FileOutputStream fos=new FileOutputStream(new File("C:\\Users\\nrgh\\Desktop\\区块链\\1.pdf"));
//获取字节长
double max=fis.available();
byte[] readbyte=new byte[10000];
int i=0;
//目前完成进度
double sum=0;
//进度
double progress=0;
while((i=fis.read(readbyte,0,readbyte.length))!=-1){
/*if (this.isCancelled()){
break;
}*/
fos.write(readbyte,0,i);
sum=sum+i;
//当前和总共
this.updateProgress(sum,max);
progress=sum/max;
System.out.println(progress);
Thread.sleep(50);
if (progress<0.5){
this.updateMessage("请耐心等待");
}else if (progress<0.8){
this.updateMessage("马上就好");
}else if (progress<1){
this.updateMessage("即将完成");
}else if (progress>=1){
this.updateMessage("搞定了");
}
}
fis.close();
fos.close();
System.out.println(Platform.isFxApplicationThread());
return progress;
}
}
- Service
package com.hc.demo;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Service;
import javafx.concurrent.Task;
import javafx.concurrent.Worker;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressBar;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
/**
* @author stone
*/
public class MyApp extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setTitle("Hello World!");
HBox hBox=new HBox(20);
Button startBtn = new Button("开始");
Button cancelBtn = new Button("取消");
Button resetBtn = new Button("重置");
Button restartBtn = new Button("重启");
ProgressBar progressBar = new ProgressBar(0);
progressBar.setPrefWidth(200);
Label l1=new Label("state");
Label l2=new Label("value");
Label l3=new Label("title");
Label l4=new Label("message");
FlowPane root = new FlowPane();
hBox.getChildren().addAll(startBtn,cancelBtn,restartBtn,resetBtn,progressBar,l1,l2,l3,l4);
root.getChildren().add(hBox);
primaryStage.setScene(new Scene(root, 700, 300));
primaryStage.show();
MyService ms=new MyService();
startBtn.setOnAction(event ->
ms.start()
);
cancelBtn.setOnAction(event ->
ms.cancel()
);
resetBtn.setOnAction(event -> {
ms.reset();
progressBar.setProgress(0);
});
restartBtn.setOnAction(event -> {
ms.restart();
});
ms.progressProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Number oldValue, Number newValue) {
progressBar.setProgress(newValue.doubleValue());
}
});
ms.titleProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, String oldValue, String newValue) {
l3.setText(newValue);
}
});
ms.valueProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Number oldValue, Number newValue) {
if(newValue.doubleValue()==1){
l2.setText("完成");
}
}
});
ms.messageProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, String oldValue, String newValue) {
l4.setText(newValue);
}
});
//wordkDone指的是进度
ms.stateProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Worker.State oldValue, Worker.State newValue) {
l1.setText(newValue.toString());
}
});
//异常监听 监听现在状态是否有异常并打印
ms.exceptionProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Throwable oldValue, Throwable newValue) {
System.out.println(newValue);
}
});
}
public static void main(String[] args) {
launch(args);
}
}
class MyService extends Service
{
@Override
protected void executeTask(Task task) {
super.executeTask(task);
task.valueProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Number oldValue, Number newValue) {
System.out.println("executeTask valueProperty");
}
});
}
@Override
protected void ready() {
super.ready();
System.out.println("ready"+Platform.isFxApplicationThread());
}
@Override
protected void scheduled() {
super.scheduled();
System.out.println("scheduled "+Platform.isFxApplicationThread());
}
@Override
protected void running() {
super.running();
System.out.println("running "+Platform.isFxApplicationThread());
}
@Override
protected void succeeded() {
super.succeeded();
System.out.println("succeeded "+Platform.isFxApplicationThread());
}
@Override
protected void cancelled() {
super.cancelled();
System.out.println("cancelled "+Platform.isFxApplicationThread());
}
@Override
protected void failed() {
super.failed();
System.out.println("failed "+Platform.isFxApplicationThread());
}
@Override
protected Task createTask() {
Task task=new Task() {
@Override
protected Number call() throws Exception {
this.updateTitle("copy");
FileInputStream fis=new FileInputStream(new File("C:\\Users\\nrgh\\Desktop\\区块链\\porep时空证明.pdf"));
FileOutputStream fos=new FileOutputStream(new File("C:\\Users\\nrgh\\Desktop\\区块链\\1.pdf"));
//获取字节长
double max=fis.available();
byte[] readbyte=new byte[10000];
int i=0;
//目前完成进度
double sum=0;
//进度
double progress=0;
while((i=fis.read(readbyte,0,readbyte.length))!=-1){
/*if (this.isCancelled()){
break;
}*/
fos.write(readbyte,0,i);
sum=sum+i;
//当前大小和总共大小
this.updateProgress(sum,max);
progress=sum/max;
/*System.out.println(progress);*/
Thread.sleep(50);
if (progress<0.5){
this.updateMessage("请耐心等待");
}else if (progress<0.8){
this.updateMessage("马上就好");
}else if (progress<1){
this.updateMessage("即将完成");
}else if (progress>=1){
this.updateMessage("搞定了");
}
}
fis.close();
fos.close();
System.out.println(Platform.isFxApplicationThread());
return progress;
}
};
return task;
}
}
- ScheduledService
package com.hc.demo;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.ScheduledService;
import javafx.concurrent.Service;
import javafx.concurrent.Task;
import javafx.concurrent.Worker;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressBar;
import javafx.scene.layout.FlowPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import javafx.util.Duration;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
/**
* @author stone
*/
public class MyApp extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setTitle("Hello World!");
HBox hBox=new HBox(20);
Button startBtn = new Button("开始");
Button cancelBtn = new Button("取消");
Button resetBtn = new Button("重置");
Button restartBtn = new Button("重启");
ProgressBar progressBar = new ProgressBar(0);
progressBar.setPrefWidth(200);
Label l1=new Label("state");
Label l2=new Label("value");
Label l3=new Label("title");
Label l4=new Label("message");
FlowPane root = new FlowPane();
hBox.getChildren().addAll(startBtn,cancelBtn,restartBtn,resetBtn,progressBar,l1,l2,l3,l4);
root.getChildren().add(hBox);
primaryStage.setScene(new Scene(root, 700, 300));
primaryStage.show();
MyScheduledService mss=new MyScheduledService();
//等待5s开始、
mss.setDelay(Duration.seconds(5));
//程序执行时间
mss.setPeriod(Duration.seconds(1));
//启动失败重新启动
mss.setRestartOnFailure(true);
//程序启动失败后重新启动次数
mss.setMaximumFailureCount(4);
startBtn.setOnAction(event ->{
mss.start();
System.out.println("开始");
});
cancelBtn.setOnAction(event ->{
mss.cancel();
System.out.println("取消");
});
resetBtn.setOnAction(event -> {
mss.reset();
System.out.println("重置");
});
restartBtn.setOnAction(event -> {
mss.restart();
System.out.println("重启");
});
mss.valueProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Number oldValue, Number newValue) {
if (newValue!=null){
l2.setText(String.valueOf(newValue));
}
}
});
mss.lastValueProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue observable, Number oldValue, Number newValue) {
if (newValue!=null){
System.out.println("lastValue="+newValue.intValue());
}
}
});
}
public static void main(String[] args) {
launch(args);
}
}
class MyScheduledService extends ScheduledService{
int sum=0;
@Override
protected Task createTask() {
System.out.println("createTask()");
Task task=new Task() {
@Override
protected void updateValue(Number value) {
super.updateValue(value);
if (value.intValue()==10){
MyScheduledService.this.cancel();
System.out.println("任务取消");
}
}
@Override
protected Number call() throws Exception {
sum=sum+1;
System.out.println(sum);
return sum;
}
};
return task;
}
}