Spring Boot中分片文件白名单

@Configuration
public class FileUploadConfig implements WebMvcConfigurer {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/uploads/**")
                .addResourceLocations("file:/path/to/uploads/")
                .setCacheControl(CacheControl.maxAge(365, TimeUnit.DAYS))
                .resourceChain(true)
                .addResolver(new PathResourceResolver() {
                    @Override
                    protected Resource getResource(String resourcePath, Resource location) throws IOException {
                        Resource requestedResource = location.createRelative(resourcePath);
                        if (isAllowedFile(requestedResource)) {
                            return requestedResource;
                        } else {
                            return new ClassPathResource("static/error.jpg");
                        }
                    }
                });
    }
    
    private boolean isAllowedFile(Resource resource) {
        // 根据自定义的规则判断文件是否在白名单中
        // 返回true表示允许访问该文件，返回false表示禁止访问该文件
    }
}