本文共 985 字，大约阅读时间需要 3 分钟。

token 我刚开始思路是 在vue 想办法 每个参数 都带上，

@Override    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {           HttpServletResponse res = (HttpServletResponse) servletResponse;        res.setHeader("Access-Control-Allow-Origin", "*");        res.setHeader("Access-Control-Allow-Credentials", "true");        res.setHeader("Access-Control-Allow-Methods", "*");        res.setHeader("Access-Control-Expose-Headers", "*");        //最关键的一步 要是图省事就写 *        res.setHeader("Access-Control-Allow-Headers", "*");//这里“Access-Token”是我要传到后台的内容key            错误代码   // res.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, timestamp ,token");         错误代码     // res.setHeader("Access-Control-Allow-Headers", "Content-Type,Access-Token");//这里“Access-Token”是我要传到后台的内容key        filterChain.doFilter(servletRequest, servletResponse);    }