向servlet response输出流实时输出日志

    @RequestMapping("/test")
    public void test(HttpServletResponse response) {
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/plain");
        response.setBufferSize(50);
        try (PrintWriter printWriter = response.getWriter()) {
            for (int i = 0; i < 100; i++) {
                Thread.sleep(300);
                printWriter.println(StrUtil.fillAfter("xxx",' ', 50));
                printWriter.flush();
            }
        } catch (Exception e) {
            log.error("syncAlc", e);
        }

    }

这里的关键就在于设置BufferSize，并且在输出后调用flush()方法。