一、表单上传【$(“#form-change-info”).serialize()】：

<!--修改资料表单开始-->
<form id="form-change-info" class="form-horizontal" role="form">
	<div class="form-group">
		<label class="col-md-2 control-label">用户名：</label>
		<div class="col-md-8">
			<input id="username" type="text" class="form-control" value="孙悟空" readonly="readonly">
		</div>
	</div>
	<div class="form-group">
		<label class="col-md-2 control-label">电话号码：</label>
		<div class="col-md-8">
			<input id="phone" name="phone" type="text" class="form-control" placeholder="请输入电话号码" value="13311311313">
		</div>
	</div>
	<div class="form-group">
		<label class="col-md-2 control-label">电子邮箱：</label>
		<div class="col-md-8">
			<input id="email" name="email" type="text" class="form-control" placeholder="请输入电子邮箱" value="[email protected]">
		</div>
	</div>
	<div class="form-group">
		<label class="col-md-2 control-label">性别：</label>
		<div class="col-md-8">
			<label class="radio-inline">
				<input id="gender-male" type="radio" name="gender" value="1" >男
			</label>
			<label class="radio-inline">
				<input id="gender-female" type="radio" name="gender" value="0">女
			</label>
		</div>
	</div>
	<div class="form-group">
		<div class="col-sm-offset-2 col-sm-10">
			<input id="btn-change-info" type="button" class="btn btn-primary" value="修改" />
		</div>
	</div>
</form>


<script type="text/javascript">
$(document).ready(function() {
	$.ajax({
		url: "/users/get_by_uid",
		type: "GET",
		dataType: "json",
		success: function(json) {
			if (json.state == 200) {
				console.log("username=" + json.data.username);
				console.log("phone=" + json.data.phone);
				console.log("email=" + json.data.email);
				console.log("gender=" + json.data.gender);

				$("#username").val(json.data.username);
				$("#phone").val(json.data.phone);
				$("#email").val(json.data.email);

				let radio = json.data.gender == 0 ? $("#gender-female") : $("#gender-male");
				radio.prop("checked", "checked");
			} else {
				alert("获取用户信息失败！" + json.message);
			}
		}
	});
});
$("#btn-change-info").click(function() {
	$.ajax({
		url: "/users/change_info",
		type: "POST",
		data: $("#form-change-info").serialize(),
		dataType: "json",
		success: function(json) {
			if (json.state == 200) {
				alert("修改成功！");
				location.href = "login.html";
			} else {
				alert("修改失败！" + json.message);
			}
		},
		error: function(xhr) {
			alert("您的登录信息已经过期，请重新登录！HTTP响应码：" + xhr.status);
			location.href = "login.html";
		}
	});
});
</script>

二、文件上传【new FormData($(“#form-change-avatar”)[0])】：

<!--上传头像表单开始-->
<form id="form-change-avatar" class="form-horizontal" role="form">
	<div class="form-group">
		<label class="col-md-2 control-label">选择头像:</label>
		<div class="col-md-5">
			<img id="img-avatar" src="../images/index/user.jpg" class="img-responsive" />
		</div>
		<div class="clearfix"></div>
		<div class="col-md-offset-2 col-md-4">
			<input type="file" name="file">
		</div>
	</div>
	<div class="form-group">
		<div class="col-sm-offset-2 col-sm-10">
			<input id="btn-change-avatar" type="button" class="btn btn-primary" value="上传" />
		</div>
	</div>
</form>


<script type="text/javascript">
$(document).ready(function () {
	console.log("cookie中的avatar=" + $.cookie("avatar"));
	$("#img-avatar").attr("src", $.cookie("avatar"));
});

$("#btn-change-avatar").click(function() {
	$.ajax({
		url: "/users/change_avatar",
		type: "POST",
		data: new FormData($("#form-change-avatar")[0]),
		dataType: "JSON",
		processData: false, // processData处理数据
		contentType: false, // contentType发送数据的格式
		success: function(json) {
			if (json.state == 200) {
				$("#img-avatar").attr("src", json.data);
				$.cookie("avatar", json.data, {expires: 7});
			} else {
				alert("修改失败！" + json.message);
			}
		},
		error: function(xhr) {
			alert("您的登录信息已经过期，请重新登录！HTTP响应码：" + xhr.status);
			location.href = "login.html";
		}
	});
});
</script>

三、获取地址栏参数传给后台【 location.search.substr(1)】：