前后端联调

前端8080，后端8081

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import org.springframework.context.annotation.Bean; 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 WebConfig implements WebMvcConfigurer {       @Override     public void addCorsMappings(CorsRegistry registry) {         registry.addMapping("/**") // 允许所有路径的跨域请求                 .allowedOrigins("http://localhost:8080") // 允许的前端源                 .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS") // 允许的HTTP方法                 .allowedHeaders("*") // 允许的头部信息                 .allowCredentials(true); // 是否允许发送Cookie     } }