从 jfilechooser 获取文件的值

Question

我有一个带有 Jbutton 的 Java 应用程序，用于选择本地文件，然后用不同类型的图表表示该文件。我想获取 JFileChooser 返回的文件并对其进行处理（拆分，在某些列表中添加值...）

这是 JButton 动作侦听器：

JButton theButton = new JButton("Choose the file to represent");
theButton.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent event) {
        int returnValue = fileChooser.showOpenDialog(null);
        if (returnValue == JFileChooser.APPROVE_OPTION) {
            theFile = fileChooser.getSelectedFile();
            ReadGCFile.getValue(theFile);
        }       
}

});         
 desktopPane.add(theButton);
 theButton.setVisible(true);
 theButton.setBounds(20, 100, 250, 20);
 getContentPane().add(theButton);

这里我要处理文件：

    public static void readGCList(List<String> gcArrayList,
        List<String> gcStringList, List<String> gcDateList)
        throws NumberFormatException, IOException, ParseException {
    File newFile = null;
    String line = "";
    String[] tokens = null;
    FileReader fr = null;
    BufferedReader bufReader = null;
    try {

        fr = new FileReader(GDRT.theFile);  
        bufReader = new BufferedReader(fr);
        while ((line = bufReader.readLine()) != null) {
            line = line.replace(",", ".");
            tokens = line.split(";");

            gcDateList.add(tokens[0]);
            gcStringList.add(tokens[1]);
            gcArrayList.add(tokens[2]);
            gcArrayList.add(tokens[3]);
            gcArrayList.add(tokens[4]);

        }


    } catch (FileNotFoundException es) {
        System.out.println("The file was not found.");

    } catch (NullPointerException e) {
        System.out.println("No files were chosen !");
    }

    catch (IOException e) {
        bufReader.close();
    }

然后我创建了一个 getValue 方法，但我不知道要在其中放什么：

 public static void getValue(File myFile) {
 System.out.println(myFile.getName());
 }

Answer 1

考虑这样的方法：

public void processFile(File newFile) {
    try {

        getValue(newFile);
        FileReader fr = new FileReader(newFile);   
        BufferedReader bufReader = new BufferedReader(fr);
        Object line;
        while ((line = bufReader.readLine()) != null) {
            line = line.replace(",", ".");
            tokens = line.split(";");

            gcDateList.add(tokens[0]);
            gcStringList.add(tokens[1]);
            gcArrayList.add(tokens[2]);
            gcArrayList.add(tokens[3]);
            gcArrayList.add(tokens[4]);

        }
}

您可以从 ActionListener 中调用：

    int returnValue = fileChooser.showOpenDialog(null);
    if (returnValue == JFileChooser.APPROVE_OPTION) {
        theFile = fileChooser.getSelectedFile();
        processFile(theFile);
    }

从 jfilechooser 获取文件的值

Get the value of a file from a jfilechooser

java

jbutton

actionlistener

jfilechooser