java.io.CharConversionException: Not an ISO 8859-1 character

        response.reset();
        response.setContentType("application/json;charset=UTF-8");

////      java.io.CharConversionException: Not an ISO 8859-1 character
        //使用response.getOutputStream() 出现异常，提示是ISO 8859-1字符编码
//        response.getOutputStream().print(mapper.writeValueAsString(result));
//        response.getOutputStream().flush();

        response.getWriter().print(mapper.writeValueAsString(result));
        response.getWriter().close();