前后端分离获取后端session为null,session跨域问题
public class MyInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("经过了拦截器");
response.setHeader("Access-Control-Allow-Origin",request.getHeader("Origin"));//支持跨域请求
response.setHeader("Access-Control-Allow-Methods", "*");
response.setHeader("Access-Control-Allow-Credentials", "true");//是否支持cookie跨域
response.setHeader("Access-Control-Allow-Headers", "Authorization,Origin, X-Requested-With, Content-Type, Accept,Access-Token");//Origin, X-Requested-With, Content-Type, Accept,Access-Token
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView) throws Exception {
System.out.println("controller 执行完了");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable Exception ex) throws Exception {
System.out.println("我获取到了一个返回的结果："+response);
System.out.println("请求结束了");
}