你不能，不使用标准的API。 HttpServletRequest表示服务器接收到的请求，因此添加新参数不是有效的选项(就API而言)。
原则上，您可以实现一个HttpServletRequestWrapper的子类，它将原始请求打包，并拦截getParameter()方法，并在转发时传递包装的请求。
如果你去这个路由，你应该使用一个过滤器来替换一个HttpServletRequestWrapper的HttpServletRequest：
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
if (servletRequest instanceof HttpServletRequest) {
HttpServletRequest request = (HttpServletRequest) servletRequest;
// Check wether the current request needs to be able to support the body to be read multiple times
if (MULTI_READ_HTTP_METHODS.contains(request.getMethod())) {
// Override current HttpServletRequest with custom implementation
filterChain.doFilter(new HttpServletRequestWrapper(request), servletResponse);
return;
}
}
filterChain.doFilter(servletRequest, servletResponse);
}