以utf-8編碼寫入檔案：

FileOutputStream fos = new FileOutputStream("test.txt");   
OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");   
osw.write(FileContent);   
osw.flush(); 

FileInputStream fis = new FileInputStream("test.txt");   
InputStreamReader isr = new InputStreamReader(fis, "UTF-8");   
BufferedReader br = new BufferedReader(isr);   
String line = null,FileContent = "";   
while ((line = br.readLine()) != null) {   
    FileContent += line;   
    FileContent += "\r\n";  
}