JAVA 进度条

2023-02-27 02:36:01Python014

JAVA 进度条,第1张

直接上官方示例

import java.awt.*

import java.awt.event.*

import javax.swing.*

import java.beans.*

import java.util.Random

public class ProgressBarDemo extends JPanel

implements ActionListener,

PropertyChangeListener {

private JProgressBar progressBar

private JButton startButton

private JTextArea taskOutput

private Task task

class Task extends SwingWorker<Void, Void> {

* Main task. Executed in background thread.

@Override

public Void doInBackground() {

Random random = new Random()

int progress = 0

//Initialize progress property.

setProgress(0)

while (progress < 100) {

//Sleep for up to one second.

try {

Thread.sleep(random.nextInt(1000))

} catch (InterruptedException ignore) {}

//Make random progress.

progress += random.nextInt(10)

setProgress(Math.min(progress, 100))

}

return null

}

* Executed in event dispatching thread

@Override

public void done() {

Toolkit.getDefaultToolkit().beep()

startButton.setEnabled(true)

setCursor(null) //turn off the wait cursor

taskOutput.append("Done!\n")

}

public ProgressBarDemo() {

super(new BorderLayout())

//Create the demo's UI.

startButton = new JButton("Start")

startButton.setActionCommand("start")

startButton.addActionListener(this)

progressBar = new JProgressBar(0, 100)

progressBar.setValue(0)

progressBar.setStringPainted(true)

taskOutput = new JTextArea(5, 20)

taskOutput.setMargin(new Insets(5,5,5,5))

taskOutput.setEditable(false)

JPanel panel = new JPanel()

panel.add(startButton)

panel.add(progressBar)

add(panel, BorderLayout.PAGE_START)

add(new JScrollPane(taskOutput), BorderLayout.CENTER)

setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20))

}

/**

* Invoked when the user presses the start button.

public void actionPerformed(ActionEvent evt) {

startButton.setEnabled(false)

setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR))

//Instances of javax.swing.SwingWorker are not reusuable, so

//we create new instances as needed.

task = new Task()

task.addPropertyChangeListener(this)

task.execute()

}

/**

* Invoked when task's progress property changes.

public void propertyChange(PropertyChangeEvent evt) {

if ("progress" == evt.getPropertyName()) {

int progress = (Integer) evt.getNewValue()

progressBar.setValue(progress)

taskOutput.append(String.format(

"Completed %d%% of task.\n", task.getProgress()))

}

/**

* Create the GUI and show it. As with all GUI code, this must run

* on the event-dispatching thread.

private static void createAndShowGUI() {

//Create and set up the window.

JFrame frame = new JFrame("ProgressBarDemo")

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

//Create and set up the content pane.

JComponent newContentPane = new ProgressBarDemo()

newContentPane.setOpaque(true) //content panes must be opaque

frame.setContentPane(newContentPane)

//Display the window.

frame.pack()

frame.setVisible(true)

}

public static void main(String[] args) {

//Schedule a job for the event-dispatching thread:

//creating and showing this application's GUI.

javax.swing.SwingUtilities.invokeLater(new Runnable() {

public void run() {

createAndShowGUI()

}

})

}

代码如下：import java.awt.Colorimport java.awt.Toolkitimport javax.swing.ImageIconimport javax.swing.JLabelimport javax.swing.JOptionPaneimport javax.swing.JProgressBarimport javax.swing.JWindow@SuppressWarnings("serial") public class Demo extends JWindow implements Runnable { // 定义加载窗口大小 public static final int LOAD_WIDTH = 455public static final int LOAD_HEIGHT = 295// 获取屏幕窗口大小 public static final int WIDTH = Toolkit.getDefaultToolkit().getScreenSize().widthpublic static final int HEIGHT = Toolkit.getDefaultToolkit().getScreenSize().height// 定义进度条组件 public JProgressBar progressbar// 定义标签组件 public JLabel label// 构造函数 public Demo() { // 创建标签,并在标签上放置一张图片 label = new JLabel(new ImageIcon("images/background.jpg"))label.setBounds(0, 0, LOAD_WIDTH, LOAD_HEIGHT - 15)// 创建进度条 progressbar = new JProgressBar()// 显示当前进度值信息 progressbar.setStringPainted(true)// 设置进度条边框不显示 progressbar.setBorderPainted(false)// 设置进度条的前景色 progressbar.setForeground(new Color(0, 210, 40))// 设置进度条的背景色 progressbar.setBackground(new Color(188, 190, 194))progressbar.setBounds(0, LOAD_HEIGHT - 15, LOAD_WIDTH, 15)// 添加组件 this.add(label)this.add(progressbar)// 设置布局为空 this.setLayout(null)// 设置窗口初始位置 this.setLocation((WIDTH - LOAD_WIDTH) / 2, (HEIGHT - LOAD_HEIGHT) / 2)// 设置窗口大小 this.setSize(LOAD_WIDTH, LOAD_HEIGHT)// 设置窗口显示 this.setVisible(true)} public static void main(String[] args) { Demo t = new Demo()new Thread(t).start()} @Override public void run() { for (int i = 0i <100i++) { try { Thread.sleep(100)} catch (InterruptedException e) { e.printStackTrace()} progressbar.setValue(i)} JOptionPane.showMessageDialog(this, "加载完成")this.dispose()} } 效果图：

在js中做一个遮罩层，当你点击的时候显示进度条，进度条读完之后再隐藏，以下有两种方式，试试，望采纳

方法一：

//开启遮罩

$.messager.progress({})

或

$.messager.progress({

title: 'Please waiting',

msg: 'Loading data...',

text: 'PROCESSING.......'

})

//关闭遮罩

$.messager.progress('close')