index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script> </head> <body> <from action="" enctype="multipart/form-data" method="post"> <a> <span>修改头像</span> <input type="file" id="fileUp"> </a> </from> <script> var fileM=document.querySelector("#fileUp"); $("#fileUp").on("change",function() { //获取文件对象，files是文件选取控件的属性，存储的是文件选取控件选取的文件对象，类型是一个数组 var fileObj = fileM.files[0]; //创建formdata对象，formData用来存储表单的数据，表单数据时以键值对形式存储的。 var formData = new FormData(); formData.append('file', fileObj); $.ajax({ url: "http://localhost:8089/index.php", type: "post", dataType: "json", data: formData, async: false, cache: false, contentType: false, processData: false, success: function (json_data) { alert("恭喜你！上传成功"); }, }); }); </script> </body> </html>
