java – 用Eclipse进度条制作闪屏

发布时间：2020-12-14 05:51:03 所属栏目：Java 来源：网络整理

导读：我的主要类从文件加载配置,然后显示一个框架.我想使用像 Eclipse这样的进度条进行初始化屏幕,以便在文件加载时进度会增加,并且文件加载后,飞溅消失.然后我的主框架加载. MainClass代码： public static void main(String[] args) { ApplicationContext conte

我的主要类从文件加载配置,然后显示一个框架.我想使用像 Eclipse这样的进度条进行初始化屏幕,以便在文件加载时进度会增加,并且文件加载后,飞溅消失.然后我的主框架加载.

MainClass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
  }
}

我没有太多的Swing经验,所以请指教如何做到这一点.

更新：我已经找到了下面的例子,但它没有什么问题：

>当计数器到达指定的数字时,它应该停止在(300),它永远计数,而不会停止定时器并隐藏闪屏.
>我想绑定计数器到文件加载,所以在加载文件时,进程将被加载,直到文件被加载,然后进程完成,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

        }

    }

}

解决方法

when the counter gets to the specified number it should stop at (300)
it keeps counting for ever without stopping the timer and hiding the
splash screen.

下面的代码似乎工作很好(有致命的缺陷,计数器可能需要更长的时间,文件加载,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(255,215);
        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();
    }
};

i want to bind the counter to the file loading,so while the file is
loaded the progress gets loaded until the file gets loaded then the
progress completes and the splash screen disappears.

您应该使用任务来查看ProgressMonitor和ProgressMonitorInputStream,然后您可以检查文件何时完全读取并结束SplashScreen.看到here有一些很棒的教程和解释

（编辑：李大同）

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