试图让zip文件管理器更新JTextArea但由于某种原因，process（）永远不会被执行。
修改
以下是建议的整个计划：
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingWorker;
import net.miginfocom.swing.MigLayout;
@SuppressWarnings("serial")
public class Reader extends JFrame{
// Sets the Window bar Title and the size of the window
private static String windowTitle = "SRT Converter";
private static Dimension windowSize = new Dimension(400,400);
private JTextField txtFileIn;
private File fileIn = null;
private File fileOut = null;
private JTextArea txtOutputPanel;
public Reader() {
JButton btnSelectArchive = new JButton("Select Archive");
btnSelectArchive.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String path = fileOpenDialog();
if(!path.isEmpty()){
fileIn = new File(path);
String[] tokens = path.split("\\\\");
StringBuilder sb = new StringBuilder();
for(int i = 0; i < tokens.length -1; i++)
{
sb.append(tokens[i] + "\\");
}
sb.append("Transcript.txt");
fileOut = new File(sb.toString());
txtFileIn.setText(fileIn.toString());
}
else {
String message = "You need to select an archive file (zip)";
JOptionPane.showMessageDialog(null, message,"No File", JOptionPane.YES_OPTION);
}
}
});
getContentPane().setLayout(new MigLayout("", "[101px,grow][71px,grow][86px,grow]", "[23px][][][][][][grow]"));
getContentPane().add(btnSelectArchive, "cell 0 0,growx,aligny top");
txtFileIn = new JTextField();
getContentPane().add(txtFileIn, "cell 1 0 2 1,growx,aligny center");
txtFileIn.setColumns(10);
JButton btnConvert = new JButton("Convert");
btnConvert.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
readZipFile();
}
});
getContentPane().add(btnConvert, "cell 0 1,growx,aligny top");
JScrollPane scrollPane = new JScrollPane();
getContentPane().add(scrollPane, "cell 0 2 3 5,grow");
txtOutputPanel = new JTextArea();
scrollPane.setViewportView(txtOutputPanel);
}
// Read in a zip file
private void readZipFile(){
Thread t = new Thread(new Runnable() {
@Override
public void run() {
ZipFile zipFile = null;
try {
zipFile = new ZipFile(fileIn);
Enumeration<? extends ZipEntry> entries = zipFile.entries();
while(entries.hasMoreElements()){
final ZipEntry entry = entries.nextElement();
writeFile("\n\n");
writeFile(entry.getName());
writeFile("\n");
FileWriterWorker fr = new FileWriterWorker(zipFile, entry);
fr.execute();
}
} catch (IOException e) {
e.printStackTrace();
}
}
});
t.start();
}
/**
* Allows user to pick a file from a directory (base directory set when created)
*
* @param fileChooser -- JFileChooser to Use
* @param panel -- panel to tie dialogBox to
* @return -- string with the path name
*/
private String fileOpenDialog()
{
String path = null;
JFileChooser fileChooser = new JFileChooser(".");
fileChooser.setAcceptAllFileFilterUsed(false);
// fileChooser.setFileFilter(filter);
int openFile = fileChooser.showOpenDialog(getContentPane());
if (openFile == JFileChooser.APPROVE_OPTION)
{
File file = fileChooser.getSelectedFile();
// check if file has extension
if (file.getAbsolutePath().endsWith(".zip"))
{
path = file.getAbsolutePath(); // if it does just return it
} else {
path = file.getAbsolutePath() + ".zip"; // if it does not append it to the path
}
} else {
path = ""; // set path to null if no file was selected (avoids null exception)
}
return path; // return path to file
}
private void writeFile(String str){
BufferedWriter bw = null;
if(fileOut == null){
try {
throw new Exception("Output File Does not exist");
} catch (Exception e) {
e.printStackTrace();
}
}
try {
bw = new BufferedWriter(new FileWriter(fileOut + "Transcript.txt", true));
bw.write(str);
bw.newLine();
bw.flush();
} catch (IOException ioe) {
ioe.printStackTrace();
} finally { // always close the file
if (bw != null) try {
bw.close();
} catch (IOException ioe2) {/* just ignore it */}
}
}
/**
* Main program driver
*
* @param args - Takes no arguments
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
InitalizeAndShowGUI();
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
private static void InitalizeAndShowGUI(){
// Create the main window
Reader mWindow = new Reader();
mWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mWindow.setTitle(windowTitle);
mWindow.setMinimumSize(windowSize); // smallest window can get
// Set window in center of Default Monitor Window
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice device = ge.getDefaultScreenDevice();
Rectangle screenRect = device.getDefaultConfiguration().getBounds();
mWindow.setLocation(screenRect.width/2 - windowSize.width/2,
screenRect.height/2 - windowSize.height/2);
mWindow.pack();
mWindow.setVisible(true);
}
private class FileWriterWorker extends SwingWorker<Void, String>{
private ZipFile zipFile;
private ZipEntry entry;
public FileWriterWorker(ZipFile zipFile, ZipEntry entry){
this.zipFile = zipFile;
this.entry = entry;
}
@Override
protected Void doInBackground() throws Exception {
InputStream stream = zipFile.getInputStream(entry);
BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
String line;
while ((line = reader.readLine()) != null) {
if(line.contains("0:") || line.isEmpty())
continue;
writeFile(line);
}
writeFile("\n\n");
publish(entry.getName());
System.out.println(entry.getName());
return null;
}
@Override
protected void process(List<String> update) {
for (String str : update) {
txtOutputPanel.append(str + "\n");
}
}
}
}
一切正常，输出文件创建，zip文件内容写成功。正在实现SwingWorker以更新用户关于正在读取的zip文件中的当前位置，因为zip包含大量文件并且将花费一些时间来读取和写出。我尝试在publish（）调用之后放置一个系统，然后执行，但process（）中的System.out.println（str）永远不会触发。除了process（）方法之外，一切都有效。甚至在process（）中的循环之前直接放置一个sysout，并且永远不会执行。任何的想法？？不解...
EDIT2
我发布了整个示例，最后的解决方案是调用readZipFile（）方法在自己的线程中读取文件，同时继续更新SwingWorker中的编写器，更新GUI运行的EDT线程。谢谢所有！