问题与CORS有关，您应该添加以下内容：
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) servletRequest; System.out.println("CORSFilter HTTP Request: " + request.getMethod()); // Authorize (allow) all domains to consume the content ((HttpServletResponse) servletResponse).addHeader("Access-Control-Allow-Origin", "*"); ((HttpServletResponse) servletResponse).addHeader("Access-Control-Allow-Methods","GET, OPTIONS, HEAD, PUT, POST"); HttpServletResponse resp = (HttpServletResponse) servletResponse; // For HTTP OPTIONS verb/method reply with ACCEPTED status pre -- per CORS handshake if (request.getMethod().equals("OPTIONS")) { resp.setStatus(HttpServletResponse.SC_ACCEPTED); return; } // pass the request along the filter chain chain.doFilter(request, servletResponse);}
