上传文件接口：

@GetMapping(value = "/open/upload")

public String fileUpload(@RequestParam(value = "file") MultipartFile file, HttpServletRequest request) {

if (file.isEmpty()) {

System.out.println("文件为空");

}

String fileName = file.getOriginalFilename();

String suffixName = fileName.substring(fileName.lastIndexOf("."));

// 上传后的路径

String filePath = "D://img//";

fileName = UUID.randomUUID() + suffixName;

File dest = new File(filePath + fileName);

if (!dest.getParentFile().exists()) {

dest.getParentFile().mkdirs();

}

try {

file.transferTo(dest);

} catch (IOException e) {

e.printStackTrace();

}

String filename = "/img/" + fileName;

return fileName;

}

配置类：

@Configuration

public class ImageConfiguration implements WebMvcConfigurer {

@Override

public void addResourceHandlers(ResourceHandlerRegistry registry) {

registry.addResourceHandler("/img/**").addResourceLocations("file:D:/img/");

}

}