JQuery实现 图片上传

<input type="hidden" name="avatar" id="avatar">
<img src="" alt="" id="avatarShow" width="200px" height="200px">


<span>上传头像</span>
<input type="file" name="file" id="file" onchange="uploadImg();"  >

<script>
function uploadImg() {
    debugger;
    if($("#file").val() != "") {
        $.ajaxFileUpload({
            type: "POST",
            url:"/selfsuperXXXXX/uploadFile",//后台接口
            dataType: "json",
            fileElementId:"file",  // 文件的id
            success: function(d){
                if(d.code == 0) {
                    js.showMessage("上传成功");
                    //图片显示
                    $("#avatar").attr("value",d.data.url);
                    $("#avatarShow").attr("src",d.data.url);
                }
            },
            error: function () {
                js.showMessage("上传失败");
            },
        });
    } else {
        js.showMessage("请先选择文件");
    }
}
</script.