文件上传

最新推荐文章于 2024-08-02 16:51:08 发布

原创最新推荐文章于 2024-08-02 16:51:08 发布 · 444 阅读

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本文详细介绍了如何使用HTML、JS、Java和Java Spring框架实现文件上传功能，并通过MultipartFile进行文件验证、上传和存储。包括前端初始化控件、上传事件处理、后端接收并验证上传文件类型、上传文件至FTP服务器的全过程。

html:

 <span id="bidFileSpan" class="btn btn-primary fileinput-button">
	 <span id="divUpload2_text">上传</span>
	 <input type="file" id="inputfile" name="inputfile"/>
 </span>

js:

//初始化控件，在那个span中只要有上传都会执行下面的方法。

function initUploadBidFile(){
	
	$("#bidFileSpan").fileupload({
		url: commons.getPath()+'/file/uploadFile.do?type=2',
		dataType : 'json',
		sequentialUploads: true
	}).bind('fileuploadprogress', function (e, data) {
		 $("#bidFileUploading").show();
	}).bind('fileuploaddone', function (e, data) {
		if (commons.checkResponse(data.result)) {
			var html = "<input type=\"hidden\" id=\"biddocumentInfoFileInformationId\" value=\""+data.result.fileInformation.objectId+"\" /><label for=\"lastname\" class=\"col-sm-0 control-label\"><a href=\""+commons.getPath()+"/download?filePath="+data.result.fileInformation.relativePath+"&fileName=bidFile\" target=\"_blank\">招标文件</a></label><button type=\"button\" class=\"btn btn-danger\" onclick=\"deleteBidFile();\">删除</button>";
			$("#payFile").empty();
			$("#payFile").append(html);
		}
		$("#bidFileUploading").hide();
	});
}

java:Controller

produces：指定返回的内容类型，仅当request请求头中的(Accept)类型中包含该指定类型才返回

    @RequestMapping(value = "/uploadFile.do", method = RequestMethod.POST, produces = "text/plain;charset=UTF-8")
   public ModelAndView uploadFile(ModelAndView mav, MultipartHttpServletRequest request, Integer type) {
       try {
           FileInformation fileInformation = UploadFileUtil.uploadFileOfMultipartHttpServletRequest(
                   request, checkFileType(type), achieveFileErrorMessage(type));
           mav.addObject("fileInformation", fileInformation);
       } catch (Exception e) {
           log.error("文件上传悲剧。", e);
           mav.addObject(SysErrorCode.RESPONSE_CODE, SysErrorCode.FILE_UPLOAD_CODE);
           mav.addObject(SysErrorCode.RESPONSE_MESSAGE, SysErrorCode.DEFAULE_FILE_UPLOAD_MESSAGE);
       }
       return mav;

   }

service:

public static FileInformation uploadFileOfMultipartHttpServletRequest(MultipartHttpServletRequest request,
           String[] checkPattern, String errorMessage) {

       Iterator<String> itr = request.getFileNames();
       MultipartFile mpf = null;

       FileInformationService fileInformationService = IocBeanFactory.getBean(FileInformationService.class);
       FileInformation fileInformation = null;
       while (itr.hasNext()) {
           String next = itr.next();//页面上的name属性从而得到value就是所谓的文件内容
           mpf = request.getFile(next);//文件的内容

           // 后台验证文件格式
           Assert.isFilePatterns(mpf, checkPattern, errorMessage);

           File file = new File(mpf.getOriginalFilename());
           try {
               mpf.transferTo(file);//把文件写入到新的文件，
               fileInformation = fileInformationService.upload(file);//把文件上传到ftp中
           } catch (Exception e) {
               throw new RuntimeException(e);
           } finally {
               if (file.exists()) {
                   file.delete();
               }
           }
       }
       return fileInformation;
   }