java 读取文件中文乱码问题

            List<Order> orderList = new ArrayList<Order>();
            InputStream fis = null;
            InputStreamReader isr = null;
            BufferedReader br = null;

            try {
                  String jsonStr = "";
                  //fis = new FileInputStream(fileName);
                  fis =  this.getClass().getResourceAsStream("/"+fileName);
                  isr = new InputStreamReader(fis,"UTF-8");//此处需要指定编码，否则会用默认的，jmeter默认的是不支持中文的。
                  br = new BufferedReader(isr);
                  while ((jsonStr = br.readLine()) != null) {
                        Gson gson = new Gson();
                        //System.out.println("jsonStr---->"+jsonStr);
                        Order order = gson.fromJson(jsonStr, Order.class);
                        orderList.add(order);
                  }
            } catch (Exception e) {
                  e.printStackTrace();
            } finally {
                  br.close();
                  isr.close();
                  fis.close();
            }