FileReader讀取文件亂碼問題

//FileReader reader = new FileReader(file);
            //注意亂碼問題
            InputStreamReader isr = null;
            try {
                isr = new InputStreamReader(new FileInputStream(file), "GBK");
            } catch (UnsupportedEncodingException e1) {
                e1.printStackTrace();
            }
            BufferedReader bufferedReader = new BufferedReader(isr);
            try {
                while(true){
                    info = bufferedReader.readLine();
                    if(info == null){
                        break;
                    }
                    System.out.println(info);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }