关于SpringBoot中Ajax跨域以及Cookie无法获取丢失问题

Cookie cookie = new Cookie(toEmail.split("@")[0],verCode);
cookie.setMaxAge(30*60);
response.addCookie(cookie);

Cookie[] cookies = request.getCookies();

var xmlhttp = new XMLHttpRequest();
xmlhttp.withCredentials = true;
xmlhttp.open("GET", readyUrl, true);
xmlhttp.send();
 

package com.crisp.myblog.config;
 
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 
@Configuration
public class corsConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                //是否发送Cookie
                .allowCredentials(true)
                //放行哪些原始域
                .allowedOriginPatterns("这里填你前端代码所在的域名:端口")
                .allowedMethods(new String[]{"GET", "POST", "PUT", "DELETE"})
                .allowedHeaders("*")
                .exposedHeaders("*");
    }
}

response.setHeader("Access-Control-Allow-Origin",request.getHeader("Origin"));

import com.alibaba.druid.util.StringUtils;
import org.springframework.stereotype.Component;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
 
 
@Component
public class crispFilter implements Filter {
 
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        Filter.super.init(filterConfig);
    }
 
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest)servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        System.out.println("跨域请求过滤器启动");
        if (request.getRequestURL().toString().matches(".+.ico$")) {
            filterChain.doFilter(servletRequest, servletResponse);
        } else {
            String origin = request.getHeader("Origin");
            // 简单请求跨域，如果是跨域请求在响应头里面添加对应的Origin
            if (!StringUtils.isEmpty(origin)) {
                response.addHeader("Access-Control-Allow-Origin", origin);
            }
            // 非简单请求跨域
            response.addHeader("Access-Control-Allow-Headers", "content-type");
            // 允许跨域请求的方法
            response.addHeader("Access-Control-Allow-Methods", "*");
            // 携带cookie的跨域
            response.addHeader("Access-Control-Allow-Credentials", "true");
 
            // 放行方法
            filterChain.doFilter(servletRequest, servletResponse);
        }
    }
 
    @Override
    public void destroy() {
        Filter.super.destroy();
    }
}