使用Java写出的简陋GUI，显示文件夹复制的进度条。
文件夹复制进度条
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import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JProgressBar;
import javax.swing.JTextField;
public class TestGUI {
static long allFileSize = 0; // 所有需要复制的文件大小
static long currentFileSizeCopied = 0;// 已复制的文件总大小
/**
* 遍历文件夹获取文件夹内容总大小
*
* @param file
*/
public static void calclateAllFilesize(File file) {
if (file.isFile()) {
allFileSize += file.length();
}
if (file.isDirectory()) {
File[] fs = file.listFiles();
for (File f : fs) {
calclateAllFilesize(f);
}
}
}
public static void main(String[] args) {
JFrame f = new JFrame("带进度条的文件夹复制");
f.setSize(450, 140);
f.setLocation(200, 200);
f.setLayout(new FlowLayout());
// 文件地址
JLabel lStr = new JLabel("源文件地址：");
JTextField strTf = new JTextField("");
strTf.setText("e:/JDK");
strTf.setPreferredSize(new Dimension(100, 30));
JLabel lDest = new JLabel("复制到：");
JTextField destTf = new JTextField("");
destTf.setText("e:/JDK2");
destTf.setPreferredSize(new Dimension(100, 30));
f.add(lStr);
f.add(strTf);
f.add(lDest);
f.add(destTf);
JButton bStartCopy = new JButton("开始复制");
bStartCopy.setPreferredSize(new Dimension(100, 30));
JLabel l = new JLabel("文件复制进度：");
JProgressBar pb = new JProgressBar();
pb.setMaximum(100);
pb.setStringPainted(true);
f.add(bStartCopy);
f.add(l);
f.add(pb);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
// 计算需要复制的文件的总大小
String srcPath = strTf.getText();
File folder = new File(srcPath);
calclateAllFilesize(folder);
// 点击开始复制
bStartCopy.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
currentFileSizeCopied = 0;
String srcPath = strTf.getText();
String destPath = destTf.getText();
new Thread(() -> copyFolder(srcPath, destPath)).start();
bStartCopy.setEnabled(false);
}
public void copyFile(String srcPath, String destPath) {
File srcFile = new File(srcPath);
File destFile = new File(destPath);
// 缓存区，一次性读取1024字节
byte[] buffer = new byte[1024];
try (FileInputStream fis = new FileInputStream(srcFile);
FileOutputStream fos = new FileOutputStream(destFile);) {
while (true) {
// 实际读取的长度是 actuallyReaded,有可能小于1024
int actuallyReaded = fis.read(buffer);
// -1表示没有可读的内容了
if (-1 == actuallyReaded)
break;
fos.write(buffer, 0, actuallyReaded);
fos.flush();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public void copyFolder(String srcPath, String destPath) {
File srcFolder = new File(srcPath);
File destFolder = new File(destPath);
if (!srcFolder.exists())
return;
if (!srcFolder.isDirectory())
return;
if (destFolder.isFile())
return;
if (!destFolder.exists())
destFolder.mkdirs();
File[] files = srcFolder.listFiles();
for (File srcFile : files) {
if (!(srcFile.isDirectory())) {
File newDestFile = new File(destFolder, srcFile.getName());
copyFile(srcFile.getAbsolutePath(), newDestFile.getAbsolutePath());
currentFileSizeCopied += srcFile.length();
double current = (double) currentFileSizeCopied / (double) allFileSize;
int progress = (int) (current * 100);
pb.setValue(progress);
if (progress == 100) {
JOptionPane.showMessageDialog(f, "复制完毕");
bStartCopy.setEnabled(true);
}
}
if (srcFile.isDirectory()) {
File newDestFolder = new File(destFolder, srcFile.getName());
copyFolder(srcFile.getAbsolutePath(), newDestFolder.getAbsolutePath());
}
}
}
});
}
}
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