通过serialize() 方法,可以对表单内容进行序列化。以键值对的方式进行呈现。

序列化后格式为:
name1=name1值&name2=name2值&name3=name3值....

举例:
<!doctype html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title></title>
</head>
<body>
   <form action="http://localhost:2000/" method="post">
       <label>
           时间:
           <input type="text" name="l_name">
       </label>
       <br>
       <label>
           地点:
           <input type="text" name="l_address">
       </label>
       <br>
       <label>
           人物:
           <input type="text" name="l_person">
       </label>
       <br>
       <input id="btn_sub" type="button" value="提交">
   </form>
<script src="node_modules/jquery/dist/jquery.js"></script>
<script>
    $('#btn_sub').on('click', function () {
        var $form = $('form');
        console.log($form.serialize());
        return false;
    });
</script>
</body>
</html>

点击提交后输出
jQuery:ajax中form表单serialize()序列化方法_jquery