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  • 简单的上传文件

    前端代码:

         <tr>
                <td align="right">上传头像:</td>
                <td>
                     <form method="post" enctype="multipart/form-data" action="/member/uploadHeadPhoto.do" id="uploadHeadPhotoForm"> 
                           <input type="file" name="headPhotoFile" id="headPhotoFile"/><br/>
    </form> </td> </tr>
         <tr><td><a href="javascript:void(0);" onclick="save();">保存</a></td></tr>

    js:

     function save(){ 
      //判断图片类型  
      var headPhotoFile = $("#headPhotoFile").val(); if(headPhotoFile){ if(!/.(gif|jpg|jpeg|png|GIF|JPG|PNG)$/.test(headPhotoFile)){ alert("图片类型必须是gif,jpeg,jpg,png中的一种"); return; } }
      $("#uploadHeadPhotoForm").submit();

      }

     

    后端代码:   

        @RequestMapping(value = "/uploadHeadPhoto.do", method = RequestMethod.POST)
    public String uploadHeadPhoto(@RequestParam("headPhotoFile") MultipartFile headPhotoFile, @RequestParam(value = "userid") Long userId, HttpServletRequest request,HttpServletResponse response) { if(!headPhotoFile.isEmpty()){ try { byte[] bytes = headPhotoFile.getBytes(); String path = request.getSession().getServletContext().getRealPath("/"); String originalFilename = headPhotoFile.getOriginalFilename(); String fileName = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + "." + originalFilename.split("\.")[1]; String relativePath = "/项目路径/images/pictures/" + fileName; BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(new File(path + relativePath))); stream.write(bytes); stream.close(); //获取此用户原来的头像 Member member = memberService.getMember(userId); if(member != null && !"".equals(member.getHeadphoto()) && member.getHeadphoto() != null){ String oldPath = path + "/项目路径/images/pictures/" + member.getHeadphoto(); deleteFile(oldPath); //删除原来的用户头像 } System.out.println("上传头像成功"); } catch (IOException e) { // TODO Auto-generated catch block System.out.println("上传头像失败"); e.printStackTrace(); } } return "redirect:项目跳转路径"; }


     

       private void deleteFile(String oldPath) {  //删除文件
          // TODO Auto-generated method stub
          File oldFile = new File(oldPath);
          if(oldFile.isFile() && oldFile.exists()){
            oldFile.delete();
          }
        }

     
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  • 原文地址:https://www.cnblogs.com/fengbing9891/p/5307789.html
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