当读入文件编码时显示字符

Question

当我将文本显示到我的文本区域时，我有一个文本编码问题。

问题是当有这样的字符:é à è

我在文本区用? ? ?代替

下面是读取我的文件的部分代码:

private void importerActionPerformed(java.awt.event.ActionEvent evt) {                                         
    jTabbedPane1.setSelectedIndex(0);
    try {
        JFileChooser explorer = new JFileChooser(chemin);
        int answer = explorer.showOpenDialog(this);
        if (answer == JFileChooser.APPROVE_OPTION) {
            chemin = explorer.getCurrentDirectory().getAbsolutePath();
             String name = explorer.getSelectedFile().getCanonicalPath();
            System.out.println("name : "+name);
             texte.setText("");
             File file = new File(name);
             try {
             DataInputStream in = new DataInputStream(new FileInputStream(file));
             String result = in.readUTF();
             texte.setText(result);
             in.close();
             System.out.println("Erreur la");
             } catch (IOException e) {
             DataInputStream in = new DataInputStream(new FileInputStream(file));
             String result = null;
             result = "";
             byte[] buff = new byte[2048];
             int read = in.read(buff, 0, 2048);
             while (read >= 0) {
             String substr = new String(buff, 0, read);
             result += substr;
             read = in.read(buff, 0, 2048);
             }
             // System.out.println(result);
             Charset charset = Charset.forName("UTF-8");
             result = charset.decode(charset.encode(result)).toString();
             texte.setText(result);
             in.close();
             //System.out.println("Erreur la2");
             }              
        }
    } catch (Exception err) {
        JOptionPane.showMessageDialog(this, "Erreur lors du chargement du fichier", "Error", JOptionPane.WARNING_MESSAGE);
    }
}                                        

我的textarea是:texte.setText(result);

你知道吗?

Answer 1

如果您的文件编码是UTF-8，那么只需像这样读取

BufferedReader br = new BufferedReader(new FileReader(file));
String line;
while ((line = br.readLine()) != null) {
  result += line;
}
br.close();
texte.setText(result);

Answer 2

字符集。Encode方法需要unicode格式的字符串。事实上，java中的所有字符串都应该是unicode (utf16)。这样做

String substr = new String(buff, 0, read, "UTF-8");

并删除所有字符集。编码/解码代码。

Answer 3

您的String substr = new String(buff, 0, read);行应该是

String substr = new String(buff, 0, read,"UTF-8"); 

构造函数String(byte[] bytes, int offset, int length)通过使用平台的默认字符集解码指定的字节子数组来构造一个新的String。