Springboot实现图片上传功能的示例代码

/**
 * 图片上传
 * @param httpServletRequest 用来获取url
 * @param file  上传的文件
 * @return ApiRestResponse
 */
@PostMapping("/admin/upload/file")
public ApiRestResponse upload(HttpServletRequest httpServletRequest,
        @RequestParam("file") MultipartFile file) {
    //获取后缀
    String fileName = file.getOriginalFilename();
    String suffixName = fileName.substring(fileName.lastIndexOf("."));
    //生成文件名称UUID
    UUID uuid = UUID.randomUUID();
    String newFileName = uuid.toString() + suffixName;
    //创建文件
    File fileDirectory = new File(Constant.FILE_UPLOAD_DIR);//文件夹
    File destFile = new File(Constant.FILE_UPLOAD_DIR + newFileName);//目标文件
    if (!fileDirectory.exists()) {
        if (!fileDirectory.mkdir()) {
            throw new SpringLearnException(SpringLearnExceptionEnum.MKDIR_FAILED);
        }
    }
    try {
        file.transferTo(destFile);
    } catch (IOException e) {
        e.printStackTrace();
    }
    try {
        return ApiRestResponse
                .success(getHost(new URI(httpServletRequest.getRequestURL() + "")) + "/images/"
                        + newFileName);
    } catch (URISyntaxException e) {
        return ApiRestResponse.error(SpringLearnExceptionEnum.UPLOAD_FAILED);
    }
}

private URI getHost(URI uri) {
    URI effectiveURI;
    try {
        effectiveURI = new URI(uri.getScheme(), uri.getUserInfo(), uri.getHost(), uri.getPort(),
                null, null, null);
    } catch (URISyntaxException e) {
        effectiveURI = null;
    }
    return effectiveURI;
}

/**
 * 描述：  常量值
 *
 */
@Component
public class Constant {



    public static String FILE_UPLOAD_DIR;

    @Value("${file.upload.dir}")
    public void setFileUploadDir(String fileUploadDir) {
        FILE_UPLOAD_DIR = fileUploadDir;
    }


}

file.upload.dir=D:/pactures/

/**
 * 描述：     配置地址映射
 */
@Configuration
public class SpringLearnWebMvcConfig implements WebMvcConfigurer {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/images/**")
                .addResourceLocations("file:" + Constant.FILE_UPLOAD_DIR);//把url地址映射到本地目录
       
    }
}