有问题的图片上传

   <table>
            <tr>
              <td>图片上传：</td>
              <td><input type=file name="myfiles" id="doc"
                         onchange="setImagePreviews();" multiple="multiple">
              </td>
              <div id="localImag">
                <img id="preview" width=-1 height=-1 style="diplay:none" />
              </div>
            </tr>
            <tr>
              <td><input type="submit" onclick="saveImage();" value="上床图片" />
              </td>
            </tr>
          </table>

        <script type="text/javascript">
          var fileimage
          //下面用于多图片上传预览功能
          function setImagePreviews(avalue) {
            var docObj = document.getElementById("doc");
            var dd = document.getElementById("localImag");
            dd.innerHTML = "";
            var fileList = docObj.files;
            fileimage=docObj.files;
            console.log(fileimage)
            for (var i = 0; i < fileList.length; i++) {
              dd.innerHTML += "<div style='float:left' > <img id='img" + i + "'  /> </div>";
              var imgObjPreview = document.getElementById("img"+i);
              if (docObj.files && docObj.files[i]) {
                //火狐下，直接设img属性
                imgObjPreview.style.display = 'block';
                imgObjPreview.style.width = '150px';
                imgObjPreview.style.height = '180px';
                //imgObjPreview.src = docObj.files[0].getAsDataURL();
                //火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式
                imgObjPreview.src = window.URL.createObjectURL(docObj.files[i]);
              }
              else {
                //IE下，使用滤镜
                docObj.select();
                var imgSrc = document.selection.createRange().text;
                alert(imgSrc)
                var localImagId = document.getElementById("img" + i);
                //必须设置初始大小
                localImagId.style.width = "150px";
                localImagId.style.height = "180px";
                //图片异常的捕捉，防止用户修改后缀来伪造图片
                try {
                  localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
                  localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;
                }
                catch (e) {
                  alert("您上传的图片格式不正确，请重新选择!");
                  return false;
                }
                imgObjPreview.style.display = 'none';
                document.selection.empty();
              }
            }
            return true;
          }
          function saveImage() {
            // console.log(fileimage)
            // // var myfiles=fileimage
            // var type = "file";
            // var myfiles = new FormData();//这里需要实例化一个FormData来进行文件上传
            // myfiles.append(type,$("#doc")[0].files[0]);
            // console.log($("#doc")[0].files[0])
            var myfiles = new FormData();
            var filelength = $('#doc')[0].files.length;
            console.log(filelength);
            console.log($('#doc')[0].files[0]);
            var i=0
            while (i<filelength){
              myfiles.append("myfiles", $('#doc')[0].files[i]);
              i++
            }
            console.log(myfiles)

            $.ajax({
              url: '/web/DemoImageController/uploadMult',
              type: 'post',
              data: myfiles,
              dataType: 'json',
              processData: false,
              cache: false,
              contentType: "multipart/form-data",
              success: function (data) {
                  console.log(data)
              }
            })
          }
        </script>