Question

在Netbeans中运行程序时，我可以正确显示这些字符（例如戦う）。之前，我将参数-J-Dfile.encoding = UTF-8添加到netbeans.conf文件中。

基本上，我正在创建一个程序，将数据附加到文本文件的末尾。在通过Netbeans运行时，数据将被正确保存，并且在我打开文件时会显示字符。但是，当我独立于Netbeans运行.jar（或运行内置的.exe）时，它只是将字符保存为文件“????”。

下面的代码显示了将数据附加到文件的方法。 boxValue []存储我要追加的String数据。通过Netbeans运行程序时，打开文件时文件输出将如下所示：

食べる吃 - 平原：现在たべる5食べる

在没有Netbeans的情况下独立运行程序会在文本文件中生成：

???吃 - 平原：现在??? 5 ???

private void prepareFile(String[] boxValue, boolean ruVerbIN, String addressIN){



 try
 {     
     int counter = 0; 
     int counter2;

     if(ruVerbIN == false)
     {
         counter2 = 63;
     }
     else
     {
         counter2 = 55;
     }

    File wordFile = new File(addressIN);
    FileWriter fileWriter = new FileWriter(wordFile, true);
    BufferedWriter buffer = new BufferedWriter(fileWriter);
    PrintWriter printWriter = new PrintWriter(buffer);

    while(counter <= counter2)
    {     
        printWriter.println(boxValue[counter]);        
        counter++;       
    }
    printWriter.close();
    counter = 0;
    outputTextBox.setText("Export successful.");
 }
 catch(IOException e)
 {     
     outputTextBox.setText("There was an error. Are you sure you entered the directory correctly? For example:" + "\n\n" + "\"C:\\\\Users\\\\Jayden\\\\Documents\\\\FLTR\\\\FLTR Data\\\\Japanese_Words.csv\"");
 }

try { int counter = 0; int counter2; if(ruVerbIN == false) { counter2 = 63; } else { counter2 = 55; } File wordFile = new File(addressIN); FileWriter fileWriter = new FileWriter(wordFile, true); BufferedWriter buffer = new BufferedWriter(fileWriter); PrintWriter printWriter = new PrintWriter(buffer); while(counter <= counter2) { printWriter.println(boxValue[counter]); counter++; } printWriter.close(); counter = 0; outputTextBox.setText("Export successful."); } catch(IOException e) { outputTextBox.setText("There was an error. Are you sure you entered the directory correctly? For example:" + "\n\n" + "\"C:\\\\Users\\\\Jayden\\\\Documents\\\\FLTR\\\\FLTR Data\\\\Japanese_Words.csv\""); }

Answer 1

FileWriter的文档：

用于编写字符文件的便捷类。的构造者此类假定默认字符编码和默认值字节缓冲区大小是可以接受的。要自己指定这些值，在OutputStreamWriter上构建FileOutputStream。

因此使用的编码取决于运行时环境。

始终明确提供编码：

try(OutputStream out = new FileOutputStream(file);
    Writer writer = new OutputStreamWriter(out, StandardCharsets.UTF_8) {
  // I/O
} catch (IOException e) {
  // error handling
}

Answer 2

您是否尝试在程序中再次阅读该文件？在Windows机器上，默认编码是CP-1252而不是UTF-8。

您还可以将BufferedWriter与给定的字符集

一起使用

FileWriter fw = new FileWriter(new OutputStreamWriter(new FileOutputStream(file), "UTF-8"));

或使用Java7

    Charset charset = Charset.forName("UTF-8");
    BufferedWriter writer = Files.newBufferedWriter(p.resolve("foo.txt"), charset)

Java：为什么中文/日文字符显示为'???'当我将数据附加到文本文件，同时运行.jar独立的Netbeans？

2 个答案: