判断一个请求是否是ajax

最新推荐文章于 2018-12-19 17:15:49 发布

原创最新推荐文章于 2018-12-19 17:15:49 发布 · 504 阅读

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本文介绍如何在HTTP请求和响应中设置编码和本地化，包括检查是否为AJAX请求并使用UTF-8编码，以及如何设置响应的本地化。

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    /**
     * Prepare a request, including setting the encoding and locale.
     *
     * @param request The request
     * @param response The response
     */
    public void prepare(HttpServletRequest request, HttpServletResponse response) {
        String encoding = null;
        if (defaultEncoding != null) {
            encoding = defaultEncoding;
        }
        // check for Ajax request to use UTF-8 encoding strictly http://www.w3.org/TR/XMLHttpRequest/#the-send-method
        <strong><span style="font-size:18px;">if ("XMLHttpRequest".equals(request.getHeader("X-Requested-With"))) {
            encoding = "UTF-8";
        }</span></strong>

        Locale locale = null;
        if (defaultLocale != null) {
            locale = LocalizedTextUtil.localeFromString(defaultLocale, request.getLocale());
        }

        if (encoding != null) {
            applyEncoding(request, encoding);
        }

        if (locale != null) {
            response.setLocale(locale);
        }

        if (paramsWorkaroundEnabled) {
            request.getParameter("foo"); // simply read any parameter (existing or not) to "prime" the request
        }
    }

注：request.getHeader("X-Requested-With") （request.getHeader中传递的参数，不区分大小写的）