CORS跨域分为后端和前端两个步骤

后端解决

实现WebMvcConfigur

@Configuration
public class WebConfig implements WebMvcConfigurer {}

重写addCorsMappings

@Configuration
public class WebConfig implements WebMvcConfigurer {@Overridepublic void addCorsMappings(CorsRegistry registry) {registry.addMapping("/**").allowCredentials(true).allowedOrigins("*").allowedMethods(new String[]{"GET","PUT","POST","DELETE"}).allowedHeaders("*").exposedHeaders("*").maxAge(3600);}
}

前端解决

临时解决

$.ajax({type: "get",async: true,url: "http://localhost/sign",xhrFields: {withCredentials: true},success:function (o){console.log(o)}});

全局解决

//设置全局有效
$.ajaxSetup({xhrFields: {withCredentials: true}
})
//普通get
$.get("http://localhost/accept",function (o) {console.log("P1:"+o)});