**HttpServletRequest获取头部数据时,其变量名是不区分大小写的,如下:**
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
/****************************************************
使用“appkey”: "123456"
使用“appKey”: "123456"
使用“APPKEY”: "123456"
都能通过下列任一方式获取该变量数据
*****************************************************/
String appkey = request.getHeader("appkey");
String appkey = request.getHeader("appKey");
String appkey = request.getHeader("APPKEY");
......
}