thymecrunch/src/main/java/com/example/demo/config/WebConfig.java

package com.example.demo.config;

import java.nio.file.Path;
import java.nio.file.Paths;

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 WebConfig implements WebMvcConfigurer {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        Path uploadPath = Paths.get("uploads").toAbsolutePath().normalize();

        registry.addResourceHandler("/uploads/**")
                .addResourceLocations("file:///" + uploadPath.toString().replace("\\", "/") + "/");
    }
}