0
什麼，我試圖做的是，當我點擊一個按鈕，我的一些文件從如USB便攜式驅動器複製這些文件複製到本地驅動器上，然後我讀，我複製ealier所有CSV文件，我把它的價值觀一個arraylist並將其注入到數據庫中，然後我可以刪除這些文件，並且我想根據進程完成情況在進度條中顯示進程。所以這是我做的：爲什麼JProgressBar值不刷新？
void main()
{
JButton btnTransfer = new JButton("Transfer");
Image transferIMG = ImageIO.read(new File("C:\\Users\\User\\Desktop\\images\\transfer.png"));
btnTransfer.setIcon(new ImageIcon(transferIMG));
btnTransfer.setPreferredSize(new Dimension(110, 90));
btnTransfer.setOpaque(false);
btnTransfer.setContentAreaFilled(false);
btnTransfer.setBorderPainted(false);
btnTransfer.setVerticalTextPosition(SwingConstants.BOTTOM);
btnTransfer.setHorizontalTextPosition(SwingConstants.CENTER);
btnTransfer.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
File csvpath = new File(fileList1.getSelectedValue() + "\\salestablet\\report\\csv");
File htmlpath = new File(fileList1.getSelectedValue() + "\\salestablet\\report\\html");
String removepath = fileList1.getSelectedValue() + "\\salestablet\\report";
if(csvpath.listFiles().length > 0 && htmlpath.listFiles().length > 0)
{
File[] csvarr = csvpath.listFiles();
File[] htmlarr = htmlpath.listFiles();
try
{
copyFileUsingStream(csvarr, htmlarr, txt.getText(), removepath);
}
catch (IOException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
});
JPanel ButtonCont = new JPanel(new GridLayout(4, 1, 5, 0));
ButtonCont.setBackground(Color.LIGHT_GRAY);
ButtonCont.add(btnTransfer);
gui.add(ButtonCont , BorderLayout.EAST);
frame.setContentPane(gui);
frame.setExtendedState(Frame.MAXIMIZED_BOTH);
frame.setMinimumSize(new Dimension(900, 100));
frame.pack();
frame.setLocationByPlatform(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
private static void copyFileUsingStream(File[] csvsources, File[] htmlsources, String dest, String removepath) throws IOException
{
int count = 0;
int MaxCount = countprocess(csvsources, htmlsources);
progressBar = new JProgressBar(0, MaxCount);
progressBar.setStringPainted(true);
InputStream is = null;
OutputStream os = null;
String csvfolderpath = dest + "\\csv";
String htmlfolderpath = dest + "\\html";
if(!(new File(csvfolderpath)).exists())
{
(new File(csvfolderpath)).mkdirs(); //create csv folder;
}
if(!(new File(htmlfolderpath)).exists())
{
(new File(htmlfolderpath)).mkdirs(); //create csv folder;
}
for(int i= 0; i < csvsources.length; i++) //copy all csv files to csv folder
{
try
{
is = new FileInputStream(csvsources[i]);
os = new FileOutputStream(csvfolderpath + "\\" + csvsources[i].getName());
byte[] buffer = new byte[1024];
int length;
while ((length = is.read(buffer)) > 0)
{
os.write(buffer, 0, length);
}
}
finally
{
count += 1;
progressBar.setValue((count/MaxCount) * 100);
//progressBar.repaint();
//progressBar.revalidate();
progressBar.update(progressBar.getGraphics());
is.close();
os.close();
}
}
for(int i= 0; i < htmlsources.length; i++) //copy all html, images and css to html folder
{
if(htmlsources[i].isFile())
{
try
{
is = new FileInputStream(htmlsources[i]);
os = new FileOutputStream(htmlfolderpath + "\\" + htmlsources[i].getName());
byte[] buffer = new byte[1024];
int length;
while ((length = is.read(buffer)) > 0)
{
os.write(buffer, 0, length);
}
}
finally
{
count += 1;
progressBar.setValue((count/MaxCount) * 100);
//progressBar.repaint();
//progressBar.revalidate();
progressBar.update(progressBar.getGraphics());
is.close();
os.close();
}
}
else if(htmlsources[i].isDirectory()) //for subfolder
{
String path = dest + "\\html\\" + htmlsources[i].getName();
if(!new File(path).exists())
{
(new File(path)).mkdirs(); //create subfolder;
}
File[] arr = (new File(htmlsources[i].getAbsolutePath())).listFiles();
for(int j = 0; j < arr.length; j++)
{
if(arr[j].isFile())
{
try
{
is = new FileInputStream(arr[j]);
os = new FileOutputStream(path + "\\" + arr[j].getName());
byte[] buffer = new byte[1000000];
int length;
while ((length = is.read(buffer)) > 0)
{
os.write(buffer, 0, length);
}
}
finally
{
if(htmlsources[i].getName().contains("images"))
{
count += 1;
progressBar.setValue((count/MaxCount) * 100);
//progressBar.repaint();
//progressBar.revalidate();
progressBar.update(progressBar.getGraphics());
}
is.close();
os.close();
}
}
}
}
}
ArrayList<String > DBValues = new ArrayList<String>(); //read all csv files values
File f1 = new File(csvfolderpath);
for(int i = 0; i < f1.listFiles().length; i++)
{
if(f1.listFiles()[i].isFile())
{
FileReader fl = new FileReader(f1.listFiles()[i]);
BufferedReader bfr = new BufferedReader(fl);
for(int j = 0; j < 2; j++)
{
if(j == 1)
{
DBValues.add(bfr.readLine());
count += 1;
progressBar.setValue((count/MaxCount) * 100);
//progressBar.repaint();
//progressBar.revalidate();
progressBar.update(progressBar.getGraphics());
}
else
{
bfr.readLine();
}
}
bfr.close();
}
}
/*for(int x = 0; x < DBValues.size(); x++)
{
//System.out.println(DBValues.get(x));
}*/
//removing csv in local computer
File f2 = new File(csvfolderpath);
File[] removelist = f2.listFiles();
for(int x = 0; x < removelist.length; x++)
{
if(removelist[x].isFile())
{
removelist[x].delete();
count += 1;
progressBar.setValue((count/MaxCount) * 100);
// progressBar.repaint();
//progressBar.revalidate();
progressBar.update(progressBar.getGraphics());
}
}
//removing csv in device
File f3 = new File(removepath + "\\csv");
if(f3.isDirectory())
{
removelist = f3.listFiles();
for(int y = 0; y < removelist.length; y++)
{
try
{
if(removelist[y].isFile())
{
//System.out.println(removelist[y].getName());
removelist[y].delete();
count += 1;
progressBar.setValue((count/MaxCount) * 100);
//progressBar.repaint();
// progressBar.revalidate();
progressBar.update(progressBar.getGraphics());
}
}
catch(Exception e)
{
System.out.println(e);
}
}
}
//removing html and images in device
File f4 = new File(removepath + "\\html");
if(f4.isDirectory())
{
removelist = f4.listFiles();
for(int z = 0; z < removelist.length; z++)
{
try
{
if(removelist[z].isFile())
{
removelist[z].delete();
count += 1;
progressBar.setValue((count/MaxCount) * 100);
// progressBar.repaint();
// progressBar.revalidate();
progressBar.update(progressBar.getGraphics());
}
else if(removelist[z].isDirectory())
{
if(removelist[z].getName().contains("images"))
{
File[] subfolder = removelist[z].listFiles();
for (int idx = 0; idx < subfolder.length; idx++)
{
if(subfolder[idx].isFile())
{
subfolder[idx].delete();
count += 1;
progressBar.setValue((count/MaxCount) * 100);
// progressBar.repaint();
// progressBar.revalidate();
progressBar.update(progressBar.getGraphics());
}
}
}
}
}
catch(Exception e)
{
System.out.println(e);
}
}
}
/* JProgressBar progressBar = new JProgressBar();
progressBar.setValue(25);
progressBar.setStringPainted(true);*/
Border border = BorderFactory.createTitledBorder("Reading...");
progressBar.setBorder(border);
gui.add(progressBar, BorderLayout.SOUTH);
gui.repaint();
gui.revalidate();
// System.out.println(count);
}
private static int countprocess(File[] csv, File[] html_image)
{
int x = 0;
int y = 0;
int z = 0;
for(int i = 0; i < csv.length; i++)
{
if(csv[i].isFile())
{
x += 1;
}
} //get total count of csv files throught loop
for(int i = 0; i < html_image.length; i++)
{
if(html_image[i].isFile())
{
y += 1;
}
else if(html_image[i].isDirectory())
{
if(html_image[i].getName().contains("images"))
{
File[] flist = html_image[i].listFiles();
for(int j = 0; j < flist.length; j++)
{
z += 1;
}
}
} //get total count of html and images files throught loop
}
return ((4*x) + (2*y) + (2*z));
}
，所以我試圖通過設置刷新我的進度條值是這樣的
progressBar.setValue((count/MaxCount) * 100);
值，但不知何故，我不能讓它工作，我進度條並沒有顯示它的進展情況，如1％2％3％.. 10％等等。相反，它僅在完成流程時顯示100％。我在這裏錯過了什麼？ 注：我也試圖設置我的進度欄值這種方式progressBar.setValue(count);仍然沒有運氣。
請今後解決壓痕:-) – raffian