boot接收图片并保存本地

controller层

public String filePath="D:/FeedbackPicture/"; //定义上传文件的存放位置
    @ResponseBody
    @PostMapping(value = "/pic")
    @CrossOrigin
    public String putpic(@RequestParam("file") MultipartFile file){
        if ((file.getOriginalFilename().isEmpty())) {
      return "插入失败";
        } else {
            Pictu pictu = new Pictu();
            String fileName = file.getOriginalFilename();
            String fileAddress = filePath + fileName;
           try {
                picUtil.uploadFile(file.getBytes(), filePath, fileName);
                } catch (Exception e) {
                e.printStackTrace();
            } finally {
            return "插入成功";
            }
        }
    }

Util工具类

//上传文件的工具类
    public static void uploadFile(byte[] file, String filePath, String fileName) throws Exception {
        File targetFile = new File(filePath);
        if(!targetFile.exists()){
         targetFile.mkdirs();
        }
        FileOutputStream out = new FileOutputStream(filePath+fileName);
        out.write(file);
        out.flush();
        out.close();
    }

跨域工具类

@Configuration
public class CorsConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOriginPatterns("*")
                .allowedMethods("POST", "GET", "PUT", "OPTIONS", "DELETE")
                .maxAge(3600)
                .allowCredentials(true);
    }
}