解決spring boot 跨域訪問，默認訪問options類型接口

（1）WebMvcConfigurerAdapter 重寫 addCorsMappings函數。默認只開放 GET, HEAD, and POST 類型的。

（2）mvc_allowedOrigins 配置生效的地址，用逗號分隔如 http://localhost


@Configuration
@EnableAspectJAutoProxy(proxyTargetClass=true)
public class MvcConfig extends WebMvcConfigurerAdapter {

 @Override
     public void addCorsMappings(CorsRegistry registry) {

    	 String[] allowedOrigins = mvc_allowedOrigins.split(",");
    	 
         registry.addMapping("/**")
                 .allowedOrigins(allowedOrigins)
                 .allowedMethods("POST", "GET", "PUT", "OPTIONS", "DELETE")
                 .maxAge(3600)
                 .allowCredentials(true);
         
     }

參考

https://blog.csdn.net/switch513/article/details/54612411