三、解决问题 1、控制器中已经添加@CrossOrigin注解，但是仍然有问题。 2、经过网上查阅资料，出现此问题的原因是我在springboot中设置了拦截器。解决方法如下：项目中采用Vue+SpringBoot技术搭建前后端分离系统，出现问题的原因是前后端分离系统中存在跨域问题。
public class JWTInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
String origin = request.getHeader("Origin");
response.setHeader("Access-Control-Allow-Origin", origin);
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
// response.setHeader("Access-Control-Allow-Headers", "x-requested-with,Authorization");
response.setHeader("Access-Control-Allow-Headers", "Content-Type,Access-Token"); // 解决vue-axios请求报错问题
response.setHeader("Access-Control-Allow-Credentials", "true");
}
