本实例所做功能为发送带附件邮件，可以上传多个附件，操作为选择一个附件以后自动上传，然后继续选择附件，填写完表单其他信息，点击保存发送带附件邮件。

HTML标签

<input id="fileUpload" type="file" name="file" data-show-preview="true" multiple/>

js初始化，设置全局文件名参数

var fileName = [];function initFileInput(id, url) { $("#" + id).fileinput({ language: 'zh', uploadAsync:false, uploadUrl:url, browseClass: "btn btn-secondary", textEncoding:"UTF-8", showUpload: false, showPreview :true, dropZoneEnabled: false, maxFileCount:5, fileActionSettings:{ showUpload: true }, enctype:'multipart/form-data', msgFilesTooMany: "选择上传的文件数量({n}) 超过允许的最大数值{m}！", }).on("filebatchselected", function(event, files) { $("#fileUpload").fileinput("upload"); }).on("filebatchuploadsuccess", function (event, data, previewId, index){ if(data.response.success == true) { fileName.push(data.response.fileName); }else{ alert("上传失败!"); } $("#fileUpload").fileinput("clear"); $("#fileUpload").fileinput("reset"); }).on('fileerror', function(event, data, msg) { alert(msg); }); }

java后台上传文件代码

@RequestMapping(value="/fileupload") @ResponseBody public Map<String, Object> fileUpload(HttpServletRequest request, HttpServletResponse response) { ResourceBundle bundle = PropertyResourceBundle.getBundle("application"); MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest)request; Map<String,MultipartFile> fileMap = multipartRequest.getFileMap(); String rootPath = bundle.getString("upLoadUrl"); String filePath = rootPath; Map<String, Object> map = new HashMap<>(); map = uploadFiles(filePath,fileMap); return map; }

实际上传操作，返回上传操作经过处理的文件名，保证服务器端文件名唯一

public Map<String, Object> uploadFiles(String savePath,Map<String,MultipartFile> fiLeMap){ Map<String, Object> map = new HashMap<>(); try { String fileName = ""; if(fiLeMap!=null){ for(Map.Entry<String, MultipartFile> entity:fiLeMap.entrySet()){ MultipartFile f = entity.getValue(); if(f != null && !f.isEmpty()){ String uuid = UUID.randomUUID().toString(); fileName = uuid + "#" + f.getOriginalFilename(); File newFile = new File(savePath + "/" + fileName); f.transferTo(newFile); } } } map.put("success", true); map.put("fileName", fileName); return map; }catch (Exception e) { map.put("success", false); return map; }}

ajax提交其他表单参数和所传附件文件名集合

$.ajax({ type: "POST", url: 所需要请求地址, dataType: "json", traditional:true, data: { service:$("#service").select2('val').replace("All",""), startTime:$("#start").val(), endTime:$("#end").val(), reason:$("#reason").val(), fileName:JSON.stringify(fileName), outterEmail:isOutterEmail, innerEmail:isInnerEmail, isSendEmail:isSendEmail, subService:$("#subService").select2('val'), runningStatus:$("#runningStatus").select2('val') }, success: function(data){ $("#loadingModal").modal("hide"); fileName.splice(0,fileName.length); alert(data.msg); if(data.success) { location.href = "revision"; } }, error:function(xhr) { $("#loadingModal").modal("hide"); alert("保存失败"); } });

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。