获取response里的数据

String out=null;
        try {
            ServletOutputStream os = servletResponse.getOutputStream();
            Field ob= ReflectionUtils.findField(os.getClass(),"ob");
            ob.setAccessible(true);
            Object obValue= ReflectionUtils.getField(ob,os);
            Field bb= ReflectionUtils.findField(obValue.getClass(),"bb");
            bb.setAccessible(true);
            Object bbValue= ReflectionUtils.getField(bb,obValue);
            Field hb= ReflectionUtils.findField(bbValue.getClass(),"hb");
            hb.setAccessible(true);
            Object value= ReflectionUtils.getField(hb,bbValue);
             out= null==value?null:new String((byte[])value, Charsets.UTF_8);

        }catch (Exception e){
            logger.debug("can not get response data",e);
            out="ERROR:"+e.getMessage();
        }
        return out;