將GBK編碼的檔案轉為UTF-8編碼的檔案

配合使用：下載的壓縮包解壓為檔案然後解碼

/**
     * 把GBK檔案轉為UTF-8
     * 兩個引數值可以為同一個路徑
     * @param srcFileName 原始檔
     * @param destFileName 目標檔案
     * @throws IOException
     */
    private static void transferFile(String srcFileName, String destFileName) throws IOException {
        String line_separator 
 
= System.getProperty("line.separator"); 
        FileInputStream fis = new FileInputStream(srcFileName);
        StringBuffer content = new StringBuffer();
        DataInputStream in = new DataInputStream(fis);
        BufferedReader d = new BufferedReader(new InputStreamReader(in, "GBK"));  //原始檔的編碼方式
 

        String line = null;
        while ((line = d.readLine()) != null)
         content.append(line + line_separator);
        d.close();
        in.close();
        fis.close();
            
        Writer ow = new OutputStreamWriter(new FileOutputStream(destFileName), "utf-8");  //需要轉換的編碼方式
        ow.write(content.toString());
        ow.close();
    }