springmvc上传文件实时显示进度条

/** * @Description: TODO * @date 2017年11月27日 下午3:29:01 */ package controller; import java.io.File; import javax.servlet.http.HttpServletRequest; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.multipart.MultipartFile; /** * @author lzc * */ @org.springframework.stereotype.Controller public class Controller { @RequestMapping(value="/upload.action") @ResponseBody public String upload(HttpServletRequest request, @RequestParam("file") MultipartFile file){ String path="D:\\"+file.getOriginalFilename(); if(uploadUtil(file, path)){ return "success"; }else{ return "false"; } } //上传文件的工具类 private boolean uploadUtil(MultipartFile file,String path){ File newFile=new File(path); if(!newFile.exists()) newFile.mkdirs(); try { file.transferTo(newFile); return true; } catch (Exception e) { return false; } } }