在项目应用中,经常会用到图片或文件上传的功能,需要我们提供接口给web,app,微信或其他系统调用,下面列出几种方式供小伙伴参考:
1、MultipartFile:图片上传在应用中经常会用到MultipartFile来接收,代码如下:
@RequestMapping("/") public Map<String,Object> imageUpload(@RequestParam("file") MultipartFile multipartFile) { String fileSavePath=shoesImagePath; if (null == multipartFile || () <= 0) { return new HashMap<String,Object>(){{put("code",400);put("msg","请选择上传文件。");}}; } //文件名 String originalName = (); String fileName= ().toString().replace("-", ""); String picNewName = fileName + ((".")); String imgRealPath = fileSavePath + picNewName; try { //保存图片-将multipartFile对象装入image文件中 File imageFile=new File(imgRealPath); (imageFile); } catch (Exception e) { return new HashMap<String,Object>(){{put("code",400);put("msg","图片保存异常:"+e);}}; } return new HashMap<String,Object>(){{put("code",200);put("msg",picNewName);}}; }
启动后台应用后,用postman调用试试:
另外,MultipartFile 还有另外一种写法,在上传接口中未显示指明接收参数名,这时候我们需从HttpServletRequest参数中获取,具体代码如下:
@RequestMapping("/") public Map<String,Object> imageUploadSec(HttpServletRequest request) { //将HttpServletRequest参数转成StandardMultipartHttpServletRequest 类型 StandardMultipartHttpServletRequest stRequest = (StandardMultipartHttpServletRequest)request; //获取multipartFiles 对象组 MultiValueMap<String,MultipartFile> multipartFiles = (); //获取MultipartFile 文件对象 MultipartFile multipartFile=("file"); if (null == multipartFile || () <= 0) { return new HashMap<String,Object>(){{put("code",400);put("msg","请选择上传文件。");}}; } String fileSavePath=shoesImagePath; String originalName = (); String fileName= ().toString().replace("-", ""); String picNewName = fileName + ((".")); String imgRealPath = fileSavePath + picNewName; try { File imageFile=new File(imgRealPath); (imageFile); } catch (Exception e) { return new HashMap<String,Object>(){{put("code",400);put("msg","图片保存异常:"+e);}}; } return new HashMap<String,Object>(){{put("code",200);put("msg",picNewName);}}; }
2、另外,我们也可以接收basic64位格式的图片数据流,并解码将其转换成图片保存:
/** * 接收basic64格式图片数据流保存成图片 * @param pImgData * @return */ @RequestMapping("/") public Map<String,Object> basic64ImageUpload(@RequestParam("pImgData") String pImgData) { if((pImgData)){ return new HashMap<String,Object>(){{put("code",400);put("msg","请选择上传图片。");}}; } try { this.saveBase64Image((" ", "+").split("base64,")[1], shoesImagePath + "//"); } catch (Exception e) { (); } return new HashMap<String,Object>(){{put("code",200);put("msg","");}}; }
//解码basic64格式图片数据流,保存成图片
public static String saveBase64Image(String base64Image, String imageFilePath) { if (base64Image == null) { return "图像数据不能为空"; } else { BASE64Decoder decoder = new BASE64Decoder(); try { File imageFile = new File(imageFilePath); if (()) { (); } byte[] b = (base64Image); for(int i = 0; i < ; ++i) { if (b[i] < 0) { b[i] = (byte)(b[i] + 256); } } OutputStream out = new FileOutputStream(imageFilePath); (b); (); (); return ""; } catch (Exception var6) { return (); } } }
以上就是常用的两种图片上传方式,是不是非常简单,如果有好的方式,小伙伴们可以在评论区探讨哦!!