您不能，不使用标准API。
HttpServletRequest代表服务器收到的请求，因此添加新参数不是有效的选择（就API而言）。
原则上，您可以实现一个子类，
HttpServletRequestWrapper该子类包装原始请求，并拦截
getParameter()方法，并在转发时传递包装的请求。
如果您走这条路线，则应使用
Filter将替换
HttpServletRequest为
HttpServletRequestWrapper：
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);}
