读取文件

        String?Content?=?"";?//?文件很长的话建议使用StringBuffer
     try?{
         FileInputStream fs=new FileInputStream("文件录取");
         InputStreamReader?isr?=?new?InputStreamReader(fis,?"UTF-8");
         
         BufferedReader?br?=?new?BufferedReader(isr);
          String?line?=?null;
         while?((line?=?br.readLine())?!=?null)?{
             Content?+=?line;
             Content?+=?"\r\n";?//?补上换行符
         }catch?(Exception?e)?{?????????
         e.printStackTrace();
                  }  

      写入文件
         
        StringBuffer sb=new StringBuffer();//文件内容
     try?{
        FileOutputStream fos=new FileOutputStream("文件路径");
    OutputStreamWriter osw=newOutputStreamWriter(fos,"utf-8");
               osw.write(sb);
       　　　　　　 osw.close();

         }catch?(Exception?e)?{?????????
        e.printStackTrace();
                }