使用jQuery的validate对提交的表单进行验证
1、将校验规则写到控件中
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/lib/jquery.js"></script>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/dist/jquery.validate.min.js"></script>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/dist/localization/messages_zh.js"></script>
<script>
$.validator.setDefaults({
submitHandler: function() {
//验证通过后执行这里
alert("提交事件!");
}
});
$().ready(function() {
$("#commentForm").validate();
});
</script>
<style>
.error{
color:red;
}
</style>
</head>
<body>
<form class="cmxform" id="commentForm" method="get" action="">
<fieldset>
<legend>输入您的名字，邮箱，URL，备注。</legend>
<p>
<label for="cname">Name (必需, 最小两个字母)</label>
<input id="cname" name="name" minlength="2" type="text" required>
</p>
<p>
<label for="cemail">E-Mail (必需)</label>
<input id="cemail" type="email" name="email" required>
</p>
<p>
<label for="curl">URL (可选)</label>
<input id="curl" type="url" name="url">
</p>
<p>
<label for="ccomment">备注 (必需)</label>
<textarea id="ccomment" name="comment" required></textarea>
</p>
<p>
<input class="submit" type="submit" value="Submit">
</p>
</fieldset>
</form>
</body>
</html>必填项未填写：
必填项不符合输入规则：
验证通过：
2、将校验规则写到 js 代码中
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/lib/jquery.js"></script>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/dist/jquery.validate.min.js"></script>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/dist/localization/messages_zh.js"></script>
<script>
$.validator.setDefaults({
submitHandler: function() {
alert("提交事件!");
}
});
$().ready(function() {
// 在键盘按下并释放及提交后验证提交表单
$("#signupForm").validate({
rules: {
firstname: "required",
lastname: "required",
username: {
required: true,
minlength: 2
},
password: {
required: true,
minlength: 5
},
confirm_password: {
required: true,
minlength: 5,
equalTo: "#password"
},
email: {
required: true,
email: true
},
"topic[]": {
required: "#newsletter:checked",
minlength: 2
},
agree: "required"
},
messages: {
firstname: "请输入您的名字",
lastname: "请输入您的姓氏",
username: {
required: "请输入用户名",
minlength: "用户名必需由两个字母组成"
},
password: {
required: "请输入密码",
minlength: "密码长度不能小于 5 个字母"
},
confirm_password: {
required: "请输入密码",
minlength: "密码长度不能小于 5 个字母",
equalTo: "两次密码输入不一致"
},
email: "请输入一个正确的邮箱",
agree: "请接受我们的声明",
topic: "请选择两个主题"
}
});
});
</script>
<style>
.error{
color:red;
}
</style>
</head>
<body>
<form class="cmxform" id="signupForm" method="get" action="">
<fieldset>
<legend>验证完整的表单</legend>
<p>
<label for="firstname">名字</label>
<input id="firstname" name="firstname" type="text">
</p>
<p>
<label for="lastname">姓氏</label>
<input id="lastname" name="lastname" type="text">
</p>
<p>
<label for="username">用户名</label>
<input id="username" name="username" type="text">
</p>
<p>
<label for="password">密码</label>
<input id="password" name="password" type="password">
</p>
<p>
<label for="confirm_password">验证密码</label>
<input id="confirm_password" name="confirm_password" type="password">
</p>
<p>
<label for="email">Email</label>
<input id="email" name="email" type="email">
</p>
<p>
<label for="agree">请同意我们的声明</label>
<input type="checkbox" class="checkbox" id="agree" name="agree">
</p>
<p>
<label for="newsletter">我乐意接收新信息</label>
<input type="checkbox" class="checkbox" id="newsletter" name="newsletter">
</p>
<fieldset id="newsletter_topics">
<legend>主题 (至少选择两个) - 注意：如果没有勾选“我乐意接收新信息”以下选项会隐藏，但我们这里作为演示让它可见</legend>
<label for="topic_marketflash">
<input type="checkbox" id="topic_marketflash" value="marketflash" name="topic[]">Marketflash
</label>
<label for="topic_fuzz">
<input type="checkbox" id="topic_fuzz" value="fuzz" name="topic[]">Latest fuzz
</label>
<label for="topic_digester">
<input type="checkbox" id="topic_digester" value="digester" name="topic[]">Mailing list digester
</label>
<label for="topic" class="error" style="display:none">至少选择两个</label>
</fieldset>
<p>
<input class="submit" type="submit" value="提交">
</p>
</fieldset>
</form>
</body>
</html>3、使用ajax方式提交数据时验证表单
原始的未校验字段的ajax方式提交：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form id="myform">
<fieldset>
<legend>验证表单</legend>
<p>
<label for="username">姓名</label>
<input id="username" name="username" type="text"/>
</p>
<p>
<input class="submit" type="submit" value="提交"/>
</p>
</fieldset>
</form>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/lib/jquery.js"></script>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/dist/jquery.validate.min.js"></script>
<script>
$("#myform").click(function () {
$.ajax({
url: "?act=valid",
type: "POST",
data: $(form).serialize(),
dataType: "json",
success: function (data) {
//console.log(data);
alert(‘提交成功‘);
$(‘#username‘).val(‘‘);
}
});
})
</script>
</body>
</html>
</html>增加校验的ajax提交方式如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form id="myform">
<fieldset>
<legend>验证表单</legend>
<p>
<label for="username">姓名</label>
<input id="username" name="username" type="text"/>
</p>
<p>
<input class="submit" type="submit" value="提交"/>
</p>
</fieldset>
</form>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/lib/jquery.js"></script>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/dist/jquery.validate.min.js"></script>
<script>
// 在ajax提交前添加校验
$("#myform").validate({
// 校验规则
rules: {
username: {
required: true,
rangelength: [2, 6]
}
},
// 校验失败时提示内容
messages: {
username: {
required: "请输入姓名",
rangelength: $.validator.format("姓名最小长度:{0}, 最大长度:{1}。")
}
},
submitHandler: function (form) {
// 将核心的ajax提交代码包含进此函数
$.ajax({
url: "?act=valid",
type: "POST",
data: $(form).serialize(),
dataType: "json",
success: function (data) {
//console.log(data);
alert(‘提交成功‘);
$(‘#username‘).val(‘‘);
}
});
}
});
</script>
</body>
</html>4、登录案例：
<div class="row">
<div class="col-sm-12">
<form id="loginForm" class="formValidate" novalidate="novalidate">
<h2 class="no-margins" style="color:#999;font-weight: bold">登录：</h2>
<p class="m-t-md" style="color:#999;font-weight: bold">进销存售后管理系统</p>
<div class="form-group">
<input type="text" class="form-control uname" placeholder="用户名" name="username" id="username" required />
</div>
<div class="form-group">
<input type="password" class="form-control pword" placeholder="密码" name="password" id="password" required />
</div>
<a href="">忘记密码了？</a>
<button class="btn btn-success btn-block" type="submit" onclick="return login()">登录</button>
</form>
</div>
</div>function login(){
let flag = $(‘#loginForm‘).valid();
if(!flag) return;
let username = $("#username").val();
let pwd = $("#password").val();
let loginUrl = baseUrl + "/login?loginName="+username+"&pwd="+pwd;
$.post(loginUrl,function (data) {
if(data == "name_or_pwd_wrong"){
alert("用户或者密码错误");
return false;
}else if(data == "fail"){
alert("登录失败");
return false;
}else{
let jsonData = eval(‘(‘+data+‘)‘);
window.location.href = "index.html";
$.cookie(jxc_username, jsonData.userName);
$.cookie(jxc_useruiqueid, jsonData.userId);
$.cookie(jxc_userroleid, jsonData.roleId);
return true;
}
});
}
$().ready(function () {
$("#loginForm").validate({
submitHandler: function (form) {
}
});
}); 
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