使用进度条（如Eclipse）制作启动屏幕

Z时代
2024-01-10
分类：问答

我的主类从文件加载配置，然后显示一个框架。我想制作一个带有进度条（如Eclipse）的启动画面，以便在加载文件时进度会增加，并且在加载文件后启动画面会消失。然后我的主机被加载。

public static void main(String[] args) {
  ApplicationContext context = new ClassPathXmlApplicationContext(
    "classpath:/META-INF/spring/applicationContext.xml");
  // splash with progress load till this file is loaded
  UserDao userDao = context.getBean(UserDao.class);
  isRegistered = userDao.isRegistered();
  System.out.println("registered: " + isRegistered);
  if (isRegistered) {
    // progress finish and hide splash
    log.debug("user is registered"); // show frame1
  } else {
    // progress finish and hide splash
    log.debug("user is not registered"); // show frame2
  }
}

我在Swing方面没有太多经验，所以请提出建议。

我发现了以下示例，但没有什么问题：

当计数器达到指定的数字时，它应停止在（300）位置，直到不停止计时器并隐藏启动画面而永远计数。

我想将计数器绑定到文件加载，因此，在加载文件时，将加载进度，直到加载文件，然后进度完成，并且初始屏幕消失。

@SuppressWarnings("serial")

@Component

public class SplashScreen extends JWindow {

static boolean isRegistered;
static Log log = LogFactory.getLog(SplashScreen.class);
private static JProgressBar progressBar = new JProgressBar();
private static SplashScreen execute;
private static int count;
private static Timer timer1;
public SplashScreen() {
    Container container = getContentPane();
    container.setLayout(null);
    JPanel panel = new JPanel();
    panel.setBorder(new javax.swing.border.EtchedBorder());
    panel.setBackground(new Color(255, 255, 255));
    panel.setBounds(10, 10, 348, 150);
    panel.setLayout(null);
    container.add(panel);
    JLabel label = new JLabel("Hello World!");
    label.setFont(new Font("Verdana", Font.BOLD, 14));
    label.setBounds(85, 25, 280, 30);
    panel.add(label);
    progressBar.setMaximum(50);
    progressBar.setBounds(55, 180, 250, 15);
    container.add(progressBar);
    loadProgressBar();
    setSize(370, 215);
    setLocationRelativeTo(null);
    setVisible(true);
}
public void loadProgressBar() {
    ActionListener al = new ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            count++;
            progressBar.setValue(count);
            if (count == 300) {
                timer1.stop();
                execute.setVisible(false);
                return;
            }
        }
    };
    timer1 = new Timer(50, al);
    timer1.start();
}
public static void main(String[] args) {
    execute = new SplashScreen();
    ApplicationContext context = new ClassPathXmlApplicationContext(
            "classpath:/META-INF/spring/applicationContext.xml");
    UserDao userDao = context.getBean(UserDao.class);
    isRegistered = userDao.isRegistered();
    if (isRegistered) {
         // show frame 1
    } else {
                                                // show frame 2
    }
}

}

回答：

当计数器达到指定的数字时，它应停止在（300）位置，直到不停止计时器并隐藏启动画面时，它一直保持计数。

下面的代码似乎很好用（存在致命缺陷，计数器可能花费比文件加载更长的时间，反之亦然）：

import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.HeadlessException;
import java.awt.event.ActionListener;
import javax.swing.*;
public class SplashScreen extends JWindow {
    static boolean isRegistered;
    private static JProgressBar progressBar = new JProgressBar();
    private static SplashScreen execute;
    private static int count;
    private static Timer timer1;
    public SplashScreen() {
        Container container = getContentPane();
        container.setLayout(null);
        JPanel panel = new JPanel();
        panel.setBorder(new javax.swing.border.EtchedBorder());
        panel.setBackground(new Color(255, 255, 255));
        panel.setBounds(10, 10, 348, 150);
        panel.setLayout(null);
        container.add(panel);
        JLabel label = new JLabel("Hello World!");
        label.setFont(new Font("Verdana", Font.BOLD, 14));
        label.setBounds(85, 25, 280, 30);
        panel.add(label);
        progressBar.setMaximum(50);
        progressBar.setBounds(55, 180, 250, 15);
        container.add(progressBar);
        loadProgressBar();
        setSize(370, 215);
        setLocationRelativeTo(null);
        setVisible(true);
    }
    private void loadProgressBar() {
        ActionListener al = new ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                count++;
                progressBar.setValue(count);
                System.out.println(count);
                if (count == 300) {
                    createFrame();
                    execute.setVisible(false);//swapped this around with timer1.stop()
                    timer1.stop();
                }
            }
            private void createFrame() throws HeadlessException {
                JFrame frame = new JFrame();
                frame.setSize(500, 500);
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        };
        timer1 = new Timer(50, al);
        timer1.start();
    }
    public static void main(String[] args) {
        execute = new SplashScreen();
    }
};