使用像Eclipse这样的进度条制作启动画面

Question

我的主类从文件加载配置然后显示一个框架.我想使用像Eclipse这样的进度条创建一个启动画面,以便在加载文件时进度会增加,并且在加载文件后启动消失.然后我的主框架被加载.

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
  }
}

我对Swing没有多少经验,所以请告知如何实现这一目标.

更新:我找到了以下示例,但它没有什么问题:

• 当计数器达到指定的数字时,它应停在(300),它会一直计数,而不会停止计时器并隐藏启动画面.

• 我想将计数器绑定到文件加载,因此在加载文件时,加载进度直到文件加载,然后进度完成,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
  
          }
  
      }
  
  }
  

Answer 1

Java有一个内置SplashScreen类,仅用于此目的.有关于如何使用它的教程在这里.

Answer 2

当计数器达到指定的数字时,它应停在(300),它会一直计数,而不会停止计时器并隐藏启动画面.

下面的代码似乎工作得很好(有致命的缺陷,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,加载进度直到文件加载,然后进度完成,启动屏幕消失.

您应该查看ProgressMonitor并ProgressMonitorInputStream使用,Task然后您可以检查文件何时完全读取并结束SplashScreen.看到这里的一些很棒的教程和解释