spting boot加载静态资源以及静态资源跨域问题

package com.bc.config;

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;


@EnableWebMvc
@Component
public class WebConfig extends WebMvcConfigurerAdapter {
/*
     * 添加静态资源文件，外部可以直接访问地址
     *
     * @param registry
     */

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");

    }

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*","null")
                .allowedMethods("POST", "GET","PUT", "DELETE");

    }
}