图片上传

<input v-on:change="change" multiple id="file" class="addpic" type="file" style=" 113px;height: 59px;opacity: 0;">
<div id="box"></div>

const uploadImg= function () {
    var formdata = new FormData();
    formdata.append("pic", $('.addpic')[0].files[0]);
    $.ajax({
        url: '',
        type: 'POST',
        data: formdata,
        dataType: 'JSON',
        cache: false,
        processData: false,
        contentType: false
    }).done(function (ret) {
        if (ret.status != 0) {
            alert("上传文件格式不合法！请选择（jpg,jpeg,gif,bmp,png）格式的图片");
            return;
        }
        console.log(ret.data.url);
    });
};