在SpringBoot2内要继承WebMvcConfigurationSupport并重写addResourceHandlers方法才能访问到静态资料。

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@Configuration
public class WebConfig extends WebMvcConfigurationSupport {
     
    /**
     * SpringBoot2必须重写该方法，否则静态资源无法访问
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**")
                .addResourceLocations("classpath:/META-INF/resources/")
                .addResourceLocations("classpath:/resources/")
                .addResourceLocations("classpath:/static/")
                .addResourceLocations("classpath:/public/");
        super.addResourceHandlers(registry);
    }
}