产生问题的原因⬇️
通过一个地址去访问另一个地址，如果下面三个地方有一个不一样则产生跨域问题：
访问协议 http httpsip地址 192.168.0.1 127.132.11.11端口号 9528 8111跨域问题解決办法⚡️
在后端接口controller添加注解 @CrossOrigin（常用）使用网关解决 代码如下 @Configuration public class RouteConfiguration { //这里为支持的请求头，如果有自定义的header字段请自己添加（不知道为什么不能使用*） private static final String ALLOWED_HEADERS = "x-requested-with, authorization, Content-Type, Authorization, credential, X-XSRF-TOKEN,token,username,client"; private static final String ALLOWED_METHODS = "*"; private static final String ALLOWED_ORIGIN = "*"; private static final String ALLOWED_Expose = "x-requested-with, authorization, Content-Type, Authorization, credential, X-XSRF-TOKEN,token,username,client"; private static final String MAX_AGE = "18000L"; @Bean public WebFilter corsFilter() { return (ServerWebExchange ctx, WebFilterChain chain) -> { ServerHttpRequest request = ctx.getRequest(); if (CorsUtils.isCorsRequest(request)) { ServerHttpResponse response = ctx.getResponse(); HttpHeaders headers = response.getHeaders(); headers.add("Access-Control-Allow-Origin", ALLOWED_ORIGIN); headers.add("Access-Control-Allow-Methods", ALLOWED_METHODS); headers.add("Access-Control-Max-Age", MAX_AGE); headers.add("Access-Control-Allow-Headers", ALLOWED_HEADERS); headers.add("Access-Control-Expose-Headers", ALLOWED_Expose); headers.add("Access-Control-Allow-Credentials", "true"); if (request.getMethod() == HttpMethod.OPTIONS) { response.setStatusCode(HttpStatus.OK); return Mono.empty(); } } return chain.filter(ctx); }; } /** * *如果使用了注册中心（如：Eureka），进行控制则需要增加如下配置 */ @Bean public RouteDefinitionLocator discoveryClientRouteDefinitionLocator(DiscoveryClient discoveryClient) { return new DiscoveryClientRouteDefinitionLocator(discoveryClient); }注意：使用了网关后就不要使用 @CrossOrigin了，如果使用，会给你跨回去，不值当，不值当！！！
