文件上传

<form accept-charset="UTF-8" enctype="multipart/form-data" action="insertFood.do" method="post">
		<input type="file" value="" name="file" multiple="true">
		<button type="submit" >新增</button>
</form>

import com.oreilly.servlet.MultipartRequest;
import com.oreilly.servlet.multipart.FileRenamePolicy;

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		//重命名策略 , 不管用 , 不知道为什么.
    FileRenamePolicy renamePolicy = new MyFileRenamePolicy();
    //传入文件地址, 文件就被保存到本地了. 这里可以传入重命名策略.
		//保存位置在这里一次到位.
    MultipartRequest m = new MultipartRequest(request, filepath, Config.maxSize);

    file = m.getFile("file");

    //给文件重命名
    String filename = new String(file.getName().getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8);
    File newFile = new File(filepath, filename);
    boolean b = file.renameTo(newFile);
    file = newFile;
		
}

import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;


@RequestMapping("/insertFood.do")
public String insertFood(Food food, HttpServletRequest request) throws Exception {
		//将当前上下文初始化给  CommonsMutipartResolver （多部分解析器）
	  CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
	  //检查form中是否有enctype="multipart/form-data"
	  if (multipartResolver.isMultipart(request)) {
	      //将request变成多部分request
	      MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
	      //获取multiRequest 中所有的文件名
	      Iterator iter = multiRequest.getFileNames();
	      while (iter.hasNext()) {
	          //一次遍历所有文件
	          MultipartFile file = multiRequest.getFile(iter.next().toString());
	          if (file != null) {
	              path = Config.uploadImgLocation + file.getOriginalFilename();
	              System.out.println(path);
	
	              //上传
	              file.transferTo(new File(path));
	              path = file.getOriginalFilename();
	          }
	      }
	  }
}


<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <!-- set the max upload size100MB -->
    <property name="maxUploadSize" value="104857600"/>
    <property name="maxInMemorySize" value="4096"/>
    <property name="defaultEncoding" value="utf-8"/>
</bean>

@RequestMapping("upload")
public PictrueResult uplodPic(MultipartFile uploadFile) {
    String fileName = uploadFile.getOriginalFilename();
    fileName = UUID.randomUUID().toString() + fileName;
    File picFile = new File("D:\\shopImg\\" + fileName);
    try {
        uploadFile.transferTo(picFile);
    } catch (IOException e) {
        e.printStackTrace();
        return new PictrueResult(1, null, "上传失败");
    }
    return new PictrueResult(0, "pic\\"+fileName, "上传成功");
}

@Value("${FASTDFS-BASE-URL}")
	private String imgUrl;
	@RequestMapping("/pic/upload")
	@ResponseBody
	public String uploud(MultipartFile uploadFile){
//		public PictrueResult uploud(MultipartFile uploadFile){
		PictrueResult res = new PictrueResult();
		try {
			FastDFSClient client = new FastDFSClient("classpath:client.conf");
			String fileId = client.uploadFile(uploadFile.getBytes());
			res.setError(0);
			res.setUrl(imgUrl+fileId);
		} catch (Exception e) {
			e.printStackTrace();
			res.setError(1);
			res.setMessage("图片上传失败");
		}
		
//		return res;
		return JsonUtils.objectToJson(res);
	}