Question

我正在尝试将UTF-8文本文件转换为Windows-1250。我正在使用Java 6 API。

我使用下面的代码，但结果肯定不是Cp1250。

import java.io.*; 

public class testing {
    public static void main (String[] args) throws IOException {   

        InputStream  input = null;
        OutputStreamWriter output = null;   

        File destinationFile = new File("C:\\test\\Cp1250.txt");   

        try {      
            input = new FileInputStream("C:\\test\\utf-8.txt");
            output = new OutputStreamWriter(new FileOutputStream(destinationFile), "Windows-1250");

            while (input.read() != -1) {
                output.write(input.read());
            }

        } catch (Exception e) {
            e.printStackTrace(); 
        } finally {
            input.close();
            output.close(); 
        }      
    }
}

Answer 1

您需要一个InputStreamReader，它知道必须使用UTF-8字符集解释来自FileInputStream的数据。

这是一个例子。为简洁起见，我省略了资源的关闭。

    FileInputStream input = new FileInputStream(file);
    InputStreamReader reader = new InputStreamReader(input, "utf-8");
    FileOutputStream output = new FileOutputStream(destinationFile);
    OutputStreamWriter writer = new OutputStreamWriter(output, "Windows-1250");

    int read = reader.read();
    while (read != -1)
    {
        writer.write(read);
        read = reader.read();
    }

另外一件事：在你的while循环中你有两次调用input.read，但你只调用一次output.write（）。这意味着您只能写出已读取的一半字节。

Answer 2

使用Java 7时，如何执行此操作：

final Path src = Paths.get("C:\\test\\utf-8.txt");
final Path dst = Paths.get("C:\\test\\Cp1250.txt");

try (
    BufferedReader reader = Files.newBufferedReader(src, StandardCharsets.UTF_8);
    BufferedWriter writer = Files.newBufferedWriter(dst, 
        Charset.forName("windows-1252"));
) {
    String line;
    while ((line = reader.readLine()) != null) {
        writer.write(line);
        writer.newLine();
    }
    writer.flush();
}

Java将UTF-8文本文件转换为Cp1250

2 个答案: