vue + axios发送post请求，403错误的解决

前端是vue2.0，网络请求用的是axios，后端是springboot2.0
用axios向后端发送post请求，结果得到一个403无权限的错误，莫名其妙啊，我明明发送的是post请，但在chrome的调试里看到的却是options。

options.png

cors.png

403.png

网友的解释.png

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;


@SpringBootApplication
public class Starter {

    public static void main(String[] args) {
        SpringApplication.run(Starter.class, args);
    }

    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedMethod("*");
        corsConfiguration.setAllowCredentials(true);
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        System.out.println("=============== 设置跨域过滤器 ================");
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig());
        return new CorsFilter(source);
    }

}