JS如何获取input中file的值并显示在页面

$(document).on('change', '.photo-box .file', function () {
 //alert($(this).val());
 function getObjectURL(file) {
 var url = null;
 if (window.createObjectURL != undefined) { // basic
 url = window.createObjectURL(file);
 } else if (window.URL != undefined) { // mozilla(firefox)
 url = window.URL.createObjectURL(file);
 } else if (window.webkitURL != undefined) { // webkit or chrome
 url = window.webkitURL.createObjectURL(file);
 }
 return url;
 }
 var objUrl = getObjectURL(this.files[0]);
 console.log("objUrl = " + objUrl);
 var html = '<p class="photo-box"><img src="' + objUrl + '" alt=""><p class="photo-btn"><p>删除</p></p></p>';
 $(this).parent().parent().append(html);
})