一个图片上传的写法

html代码

<form class="employee-editInfo-logo clearfix" id="uploadform">
                                          <img id="employee-editlogo" onclick="onEmployeeModImgSelect()" alt="员工个人头像"  src="" width="120" height="144"  class="fl">
                                          <input type="file" id="employee-editlogo-btn" onchange="employeeModImgPreview()"  name="file" multiple="multiple" class="fl">
                                          <div class="employee-uploadpic-btn fl" onclick="employeeupload()">本地上传</div>
                                       </form>

　　js代码

function onEmployeeModImgSelect(){
        $.fileButton("employee-editlogo-btn", "employee-editlogo");
    };
     
    function  employeeModImgPreview(){
        var filepath = $("#employee-editlogo-btn").val();
        var fileArr = filepath.split(".");
        if (fileArr[fileArr.length - 1] != "jpg"
                && fileArr[fileArr.length - 1] != "png"
                && fileArr[fileArr.length - 1] != "gif"
                && fileArr[fileArr.length - 1] != "bmp"
                && fileArr[fileArr.length - 1] != "jpeg") {
            $.addMessage("文件格式不正确,请选择jpg,jpeg,png,gif,bmp格式的文件", "error");
            $("#employee-editlogo-btn").val("");
            $("#employee-editlogo").attr("src", "./assets/images/head.png");
            return;
        } else {
            $.imgPreview("employee-editlogo-btn", "employee-editlogo");
        }
    };
     
 
    var employeeupload = function() {
             
            var formData = new FormData($("#uploadform" )[0]); 
            $.ajax({ 
               url: 'http://10.0.28.99:8080/majordomo/upload/pictures', 
               type: 'POST', 
               data: formData, 
               async: false, 
               cache: false, 
               contentType: false, 
               processData: false, 
               success: function (data){ 
                 alert(data.data.photos); 
               }, 
               error: function (data){ 
                 $.addMessage("请求出错了，请重试", "error");
              } 
           }); 
        }