SpringBoot上传图片操作

    首先有个上传文件的工具类

/**
 * 文件上传
 * @param file
 * @param filePath
 * @param fileName
 * @throws Exception
 */
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+File.separator+fileName);
    out.write(file);
    out.flush();
    out.close();
}

 

2. 配置真实路径与虚拟路径的映射关系

public class TestApplication extends WebMvcConfigurerAdapter {


    public static void main(String[] args) {
        SpringApplication.run(TestApplication.class, args);
    }


    @Value("${upload.filePath}")
    private String filePath;


    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry){
        registry.addResourceHandler("/");
        registry.addResourceHandler("/images/**").addResourceLocations("file:"+filePath);
        super.addResourceHandlers(registry);
    }

}

 3. 上传的主要方法实现

@PostMapping("/test/common/uploadFile")
    public String uploadFile(
                    @RequestParam("file") MultipartFile file, HttpServletRequest request) {

        try {
               //定义相对路径
            String relativePath = File.separator+DateUtil.getToday()+File.separator;
            String path = filePath + relativePath;
            String fileName = file.getOriginalFilename();
            String uuid = UUID.randomUUID().toString().replaceAll("-","");
            String suffix = fileName.substring(fileName.lastIndexOf("."));


               //随机生成新的文件名，防止文件名冲突或者中文乱码问题
            String newFileName = uuid+suffix;

               //调用上传方法将文件上传到物理路径下
            FileUtil.uploadFile(file.getBytes(),path,newFileName);


            //可选：将图片路径存储起来为了定期清理图片（可以存储到非关系型数据库中，如mongodb）
            PicturePathDTO dto = new PicturePathDTO();
            dto.setPath(images+relativePath+newFileName);
            dto.setCreateTime(new Date());
            picturePathDao.save(dto);


            //返回虚拟路径
            return (images+relativePath+newFileName);

        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }