如何从spring引导应用程序的jQuery函数加载静态映像

$('.card-post__image')
    .css('background-image', 'url("https://www.zamzar.com/images/filetypes/jpg.png")')
    .css({ width: '100px', height: '100px', 'background-size': '100%' });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div id="testing"> 
    <div class="card-post__image"></div>
</div>

var image = new Image();

image.onload = function () {
  $('body').append(this);
};

image.error = function () {
  console.log('ERROR!');
};

image.src = 'https://www.zamzar.com/images/filetypes/jpg.png';

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>