src/main/resources/templates/system/user/profile/avatar.html

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<!DOCTYPE html>
<html lang="zh" xmlns:th="http://www.thymeleaf.org">
<meta charset="utf-8">
<title>用户头像修改</title>
<link href="/ajax/libs/cropbox/cropbox.css" th:href="@{/ajax/libs/cropbox/cropbox.css}" rel="stylesheet"/>
<body class="white-bg">
<input id="imgSrc" type="hidden" th:value="${user.avatar}"/>
<div class="container">
    <div class="imageBox">
        <div class="thumbBox"></div>
        <div class="spinner" style="display: none">Loading...</div>
    </div>
    <div class="action">
        <div class="new-contentarea tc">
            <a href="javascript:void(0)" class="upload-img"> <label for="avatar">上传图像</label> </a>
            <form id="uploadForm" enctype="multipart/form-data">
                <input type="file" class="" name="file" id="avatar" accept="image/*"/>
            </form>
        </div>
        <input type="button" id="btnCrop" class="Btnsty_peyton" value="裁切"/>
        <input type="button" id="btnZoomIn" class="Btnsty_peyton" value="+"/>
        <input type="button" id="btnZoomOut" class="Btnsty_peyton" value="-"/>
        <input type="button" id="blobSubmit" class="Btnsty_peyton" value="提交"/>
    </div>
    <div class="cropped"></div>
</div>
<div th:include="include::footer"></div>
<script th:src="@{/ajax/libs/cropbox/cropbox.js}"></script>
<script type="text/javascript">
    $(window).load(function () {
        var options = {
            thumbBox: '.thumbBox',
            spinner: '.spinner',
            imgSrc: $("#imgSrc").val()
        }
        var cropper = $('.imageBox').cropbox(options);
        $('#avatar').on('change',
            function () {
                var reader = new FileReader();
                reader.onload = function (e) {
                    options.imgSrc = e.target.result;
                    //根据MIME判断上传的文件是不是图片类型
                    if ((options.imgSrc).indexOf("image/") == -1) {
                        parent.layer.alert("文件格式错误，请上传图片类型,如：JPG,JEPG，PNG后缀的文件。", {icon: 2, title: "系统提示"});
                    } else {
                        cropper = $('.imageBox').cropbox(options);
                    }
                }
                reader.readAsDataURL(this.files[0]);
            })
        $('#blobSubmit').on('click', function () {
            var formdata = new FormData($("#uploadForm")[0]);
            if ($("#avatar").val() == null || $("#avatar").val() == '') {
                $.modal.msgError("请选择图片！")
            } else {

                $.modal.loading('处理中');

                $.ajax({
                    url: "/user/updateAvatarSave",