ajax上傳文件（前端模板，複製即用，可選擇多文件的哦~）
需要注意的是，要引入jquery的包哦js/jquery.min.js
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3個meta標籤*必須*放在最前面，任何其他內容都*必須*跟隨其後！ -->
<meta name="description" content="">
<meta name="author" content="">
<link rel="icon" href="img/favicon.ico">
<title>Jeesoul</title>
<style>
/*下面的星號讓素有元素內外邊距都爲0，不留空隙*/
* {
padding: 0px;
margin: 0px;
}
</style>
</head>
<body>
<div style="text-align: center; margin-top: 50px;">
<form id="form" action="" enctype="multipart/form-data" method="post">
賬號：<input type="text" id="username" value="" />
<br>
密碼：<input type="password" id="password" value="" />
<br>
<input id="file" type="file" multiple="multiple" style="margin-left: 80px;margin-top: 20px;" />
<br>
<input type="button" id="btn" value="提交" />
</form>
</div>
</body>
<script src="js/jquery-3.3.1.js"></script>
<script src="js/jquery.min.js"></script>
<script>
$(function() {
$("#btn").click(function() {
var msg = confirm("確定提交嗎？")
if (msg == false) {
return;
}
var formData = new FormData();
//formData可以添加額外參數
formData.append("username", $("#username").val());
formData.append("password", $("#password").val());
for (var i = 0; i < $('#file')[0].files.length; i++) {
formData.append('files', $('#file')[0].files[i]);
}
$.ajax({
url: "http://127.0.0.1:8181/files/uploadfiles",
type: "POST",
processData: false,
contentType: false,
data: formData,
success: function(d) {
console.log(d)
alert("恭喜您，上傳文件成功！")
},
error: function() {
alert("請求出錯啦")
}
});
});
})
</script>
</html>