js使用formData实现批量上传

/**
 * 批量上传
 */
 @PostMapping("upload")
 public ResultModel> upload(HttpServletRequest request, @RequestParam("applyId") String applyId){
 List multipartFileList = ((MultipartHttpServletRequest) request).getFiles("attachment");
 System.out.println(multipartFileList.size());
 System.out.println(applyId);
 return null;
 }

 /**
 * 批量上传2 （推荐使用）
 */
 @PostMapping("upload2")
 public ResultModel> upload2(MultipartFile[] attachment,@RequestParam("applyId") String applyId){
 System.out.println(attachment.length);
 System.out.println(applyId);
 return null;
 }

 

 

 附件管理：
 

  Add Attachment
  Delete Attachment
  Upload
 
 
 

 附件上传：
 


 
 
 

//attachment-remove
 $("#attachmentInputs").on("click", ".attachment-remove", function (even) {
 $(this).prev().remove();//删除上一个兄弟节点
 $(this).remove();//删除自己
 });

 //add but
 $("#attachmentAddBtn").click(function (even) {
 //name值一样就可以
 $("#attachmentInputs").append("");
 });

 //delete
 $("#attachmentDeleteBtn").click(function (even) {
 var files = $("#attachmentInputs input[type='file']");
 files.each(function (index, element) {
 //从最下面开始删除，至少保留一个
 if (!(index === 0) && index === (files.length - 1)) {
 $(element).next().remove();
 $(element).remove();
 }
 });
 });

 //upload
 $("#attachmentUploadBtn").click(function (even) {
 //1、通过HTML表单创建FormData对象 自动注入
 // var formData = new FormData($("#attachments")[0]);

 //2、从零开始创建FormData对象 手动注入
 var formData = new FormData();
 //注入 name=file
 var files = $("#attachmentInputs input[type='file']");
 for (var i = 0; i < files.length; i++) {
 //注意：这里append进去的是File对象，而不是FileList对象
 formData.append("attachment", files[i].files[0]);
 }
 //注入name=text
 formData.append("applyId", "123456");

 console.log(formData.getAll("attachment"));
 
 //执行上传
 $.ajax({
 url: ctx + "/attachment/upload2",
 type: "post",
 data: formData,
 processData: false,
 contentType: false,
 success: function (data) {
 },
 error: function (e) {
 }
 });
 });

 //add one input
 $("#attachmentAddBtn").click();

 

 

 附件管理：
 

  Upload
 
 
 

 附件上传：
 

  
 
 
 
 

//upload2
 $("#attachmentUploadBtn2").click(function (even) {
 //1、通过HTML表单创建FormData对象 自动注入
 // var formData = new FormData($("#attachments2")[0]);

 //2、从零开始创建FormData对象 手动注入
 var formData = new FormData();
 //注入 name=file
 var files = $("#attachmentInputs2 input[type='file']");
 for (var i = 0; i < files[0].files.length; i++) {
 formData.append("attachment", files[0].files[i]);
 }
 //注入name=text
 formData.append("applyId", "123456");

 console.log(formData.getAll("attachment"));

 //执行上传
 $.ajax({
 url: ctx + "/attachment/upload2",
 type: "post",
 data: formData,
 processData: false,
 contentType: false,
 success: function (data) {
 },
 error: function (e) {
 }
 });
 });

 

 

 附件管理：
 

  Select File
  Upload
 
 
 

 附件上传：
 
 

 
 
 
 

//存放file对象
 var attachmentArray = [];
 //attachment-remove
 $("#attachmentText3").on("click", ".attachment-remove", function (even) {
 //删除attachmentArray数据
 attachmentArray.splice($(this).data("index"), 1);
 //删除html对象
 $(this).prev().prev().remove();
 $(this).prev().remove();
 $(this).remove();
 });

 //Select File
 $("#selectFile").click(function (even) {
 // 获取input
 $("#attachmentInputs3").click();
 });

 //input change
 $("#attachmentInputs3").change(function (even) {
 // 获取input
 var fileName = $(this).val();
 var file = $(this)[0].files[0];
 //是否选择了文件
 if (fileName) {
 attachmentArray.push(file);
 $("#attachmentText3").append("
" + fileName + "
")
 }
 });

 //upload3
 $("#attachmentUploadBtn3").click(function (even) {
 //这里只能手动注入
 var formData = new FormData();
 //遍历数据，手动注入formData
 for (var i = 0; i < attachmentArray.length; i++) {
 formData.append("attachment", attachmentArray[i]);
 }
 formData.append("applyId", "123456");
 console.log(formData.getAll("attachment"));
 //执行上传
 $.ajax({
 url: ctx + "/attachment/upload",
 type: "post",
 data: formData,
 processData: false,
 contentType: false,
 success: function (data) {
 },
 error: function (e) {
 }
 });
 });