使用Java快速实现进度条（转）

基于有人问到怎样做进度条，下面给个简单的做法：

主要是使用JProgressBar（Swing内置javax.swing.JProgressBar）和SwingWorker（Swing内置javax.swing.SwingWorker）

 

有人肯定会说，不是用线程做的吗？使用线程共享一个变量，确实可以。不过这种方式不太优雅，当然，你可以再用线程封装也行。不过，SwingWorker已经帮我们封装好啦～～使用现成的东西来做还是方便^_^

 

先看效果：

 

 

 

 

 

 

 

 

下面看代码：很简单,相信各位大大肯定是懂的～

package org.ubird;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import javax.swing.SwingWorker;

public class TestSwingWorker extends SwingWorker<List<Image>,String>{

    private JLabel status;
    private JPanel viewer;
    private String[] imagesName;
    private JProgressBar jpb;

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable(){
            public void run() {
                TestFrame frame = new TestFrame();
                final JPanel panel = new JPanel();
                final JLabel label = new JLabel();

                final String[] imagesName = new String[38];
                for(int i=0; i<imagesName.length; i++){
                    imagesName[i] = "res/1 ("+(i+1)+").jpg";
                }

                JScrollPane sp = new JScrollPane(panel);
                sp.setSize(new Dimension(700,500));
                frame.add(sp,BorderLayout.CENTER);

                JPanel stp = new JPanel();
                final JProgressBar jpb = new JProgressBar();
                jpb.setMinimum(1);
                jpb.setMaximum(imagesName.length);
                stp.add(jpb);
                stp.add(label);
                frame.add(stp,BorderLayout.SOUTH);

                JButton button = new JButton("load image");
                button.addActionListener(new ActionListener(){
                    public void actionPerformed(ActionEvent e) {
                        TestSwingWorker sw = new TestSwingWorker(label, panel, imagesName, jpb);
                        sw.execute();
                    }
                });

                frame.add(button,BorderLayout.NORTH);

                frame.setVisible(true);
            }
        });
    }

    public TestSwingWorker(JLabel status, JPanel viewer, String[] imagesName, JProgressBar jpb){
        this.status = status;
        this.viewer = viewer;
        this.imagesName = imagesName;
        this.jpb = jpb;
    }

    @Override
    protected List<Image> doInBackground() throws Exception {
        List<Image> image = new ArrayList<Image>();
        for(int i=0; i<imagesName.length; i++){
            image.add(ImageIO.read(getClass().getClassLoader().getResource(imagesName[i])));
            publish("已经加载了  "+(i+1)+"/"+imagesName.length+" : "+imagesName[i]);
        }
        return image;
    }

    @Override
    protected void process(List<String> chunks) {
        status.setText(chunks.get(chunks.size()-1));
        int x = Integer.parseInt(chunks.get(chunks.size()-1).substring(chunks.get(chunks.size()-1).indexOf("(")+1,chunks.get(chunks.size()-1).indexOf(")")).trim());
        jpb.setValue(x);

        for(String str : chunks){
            System.out.println(str);
        }
    }

    @Override
    protected void done() {
        try {
            for(Image image : get()){
                JLabel label = new JLabel(new ImageIcon(image));
                label.setSize(160, 120);
                label.setPreferredSize(new Dimension(160,120));
                viewer.add(label);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
    }


}

 

 

 

package org.ubird;

import javax.swing.JFrame;

public class TestFrame extends JFrame {


    public TestFrame(){
        setTitle("Test Frame");
        setSize(800,600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

 

 

 

该程序的可运行源码、资源图片的下载地址：http://download.csdn.net/source/3245370

NOTE：解压后双击里面的：CompileAndRun.bat可在Win下直接运行

http://blog.csdn.net/kakashi8841/article/details/6388797