9

我的主类从文件加载配置，然后显示一个框架。我想制作一个像 Eclipse 这样的带有进度条的启动画面，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。然后我的主框架被加载。

主类代码：

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
  }
}

我对 Swing 没有太多经验，所以请告知如何实现。

更新：我找到了以下示例，但问题不大：

  • 当计数器达到指定的数字时，它应该在 (300) 处停止，它会一直计数，而不会停止计时器并隐藏启动屏幕。

  • 我想将计数器绑定到文件加载，因此在加载文件时会加载进度，直到加载文件然后进度完成并且启动屏幕消失。

    @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

        }

    }

}
4

2 回答 2

10

SplashScreenJava 有一个专门用于此目的的内置类。这里有一个关于如何使用它的教程。

于 2012-07-09T17:26:11.093 回答
9

当计数器达到指定的数字时，它应该在 (300) 处停止，它会一直计数，而不会停止计时器并隐藏启动屏幕。

下面的代码似乎很好用（有一个致命缺陷，计数器可能需要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();
    }
};

我想将计数器绑定到文件加载，因此在加载文件时会加载进度，直到加载文件然后进度完成并且启动屏幕消失。

您应该查看ProgressMonitor并ProgressMonitorInputStream使用 a Task，然后您可以检查文件何时被完全读取并结束SplashScreen. 在这里查看一些很棒的教程和解释

于 2012-07-15T14:26:25.110 回答