Java读写UTF-8格式的文件

File f=new File(rawfilename);
  if(f.exists()) {
   BufferedReader br=null;
   try {
    String line;
    InputStreamReader read = new InputStreamReader(new FileInputStream(f),"utf-8");
    br=new BufferedReader(read);
    while((line=br.readLine())!=null) {

 

    /**/

    }
   }
}