Http请求中的request参数重新组装成Map的工具类实现

• 将请求的request的参数重新组装。主要是将空值的替换成null,因为requestMap空值是" ",这样处理有利于外部判断, 同时将获取到的值映射到页面上

protected Map<String, Object> assemblyRequestMap(HttpServletRequest request) {
    Map<String, Object> params = new HashMap<String, Object>();
    Map<String, String[]> map = request.getParameterMap();
    Iterator<String> key = map.keySet().iterator();
    while (key.hasNext()) {
        String k = (String) key.next();
        String[] value = map.get(k);
        if (value.length == 1) {
            String temp = null;
            if (!StringUtil.isBlank(value[0])) {
                temp = value[0];
            }
            params.put(k, temp);
            request.setAttribute(k, temp);
        } else if (value.length == 0) {
            params.put(k, null);
            request.setAttribute(k, null);
        } else if (value.length > 1) {
            params.put(k, value);
            request.setAttribute(k, value);
        }
    }
    return params;
}