• 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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  • 原文地址：https://www.cnblogs.com/zoro-zero/p/12698138.html
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