讀檔案：使用new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"));

　　　　 StringBuffer strBuf = new StringBuffer();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"));
 int tempchar;
 while ((tempchar = bufferedReader.read()) != -1) {
 strBuf.append((char) tempchar);
 }
 bufferedReader.close();
 return strBuf.toString();
 

寫檔案：使用new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), "UTF-8"));

　　　　　File file = new File(filePath + "/" + fileName);
        if (!file.exists()) {// 如果檔案不存在則建立
            file.createNewFile();
        } else {
            throw new Exception("檔案已存在");
        }
        
 
// 獲取該檔案的緩衝輸出流
        BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), "UTF-8"));
        // 寫入資訊
        bufferedWriter.write(content);
        bufferedWriter.flush();// 清空緩衝區
        bufferedWriter.close();// 關閉輸出流