前后端分离项目

后端接口做了跨域的处理

前端在header中传递了token，解决办法：

@Override
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
      throws IOException, ServletException {
    HttpServletResponse res = (HttpServletResponse) response;
    res.setHeader("Access-Control-Allow-Origin", "*");
    res.setHeader("Access-Control-Allow-Methods", "POST");
    //res.setHeader("Access-Control-Allow-Headers", "Access-Control");
    res.setHeader("Access-Control-Allow-Headers", "*");
    res.setHeader("Allow", "POST");
    chain.doFilter(request, response);

  }

主要是：

希望对你有所帮助