File resource config spring boot.java

//package its.your.package.name.here

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class ResourceConfig implements WebMvcConfigurer {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        String path = "file:/usr/local/";
        registry.addResourceHandler("/content/**")
                .addResourceLocations(path);
    }
}