本文主要是介绍第六天 我为集成平台狂(四)-步履轻盈的JQuery(二),希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
3月6日,小雨,温度有点低,“乍暖还寒时候,最难将息”。研究了集成平台的验证方法,似乎用的jquery.validate,从平台生成的JS文件夹里,发现了jquery.validate.js文件,肯定了俺的判断。有必要挖一挖jquery.validate.js的使用方法,极具实用性。
1、牛刀小试
第一步,官方网站下载jquery.validate.js:http://bassistance.de/jquery-plugins/jquery-plugin-validation/。导入jquery.validate库,放在jquery-1.8.3.js的后面,注意顺序不要颠倒:
<script src="js/jquery-1.8.3.js"></script>
<script src="js/jquery.validate.js"></script>
第二步,编写测试表单validateTest.html
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>JQuery Test</title>
<script src="js/jquery-1.8.3.js"></script>
<script src="js/jquery.validate.js"></script>
<script src="js/myValidate1.js"></script>
</head><body><form id="testForm" name="form1" method="get" action=""><p> 用户名:<input type="text" name="loginName" class="required"><p>电子邮件:<input type="text" name="eMail" class="required email"><p>手机:<input type="text" name="cellPhone" class="required mobile"><p> 密码:<input type="password" name="password" id="password"class="required"><p>密码验证:<input type="password" name="password2" class="required"><p><input class="submit" type="submit" name="button" id="button" value="提交" /></p></form>
</body>
</html>
第三步,添加脚本myValidate1.js来进行验证
$(document).ready(function(e) {$("#testForm").validate({})
});
运行测试表单validateTest.html,不填任何内容,点击确定按钮,结果如图:
很神奇的情况出现了,我们没有写任何信息提示,但是,提示如愿而至,太爽了。但是,高兴的太早,提示信息是洋文。为什么会出现这种状况?
分析一下代码,在validateTest.html中,class属性表示验证规则,其中required表示必填的,number表示必须是数字,email表示必须是电子邮件格式,如果写成required email表示这个字段必须填写同时必须是email格式;那么required number mobile,就是满足必填-数字-mobile格式这三个校验条件。
由于验证规则写到字段元素的class属性中 ,所以myValidate1.js中的内容只有一句 $("#testForm").validate(),即可完成最简单的字段验证。
那么,善于刨根问底的你也许好奇提示消息的出处?别急,打开jQuery.Validate源代码(1.11.1版),在281行,会发现这些提示消息的定义方式。当然jQuery.Validate还提供许多验证方法,如电子邮件,网址,日期,范围,最大值,最小值,整数,值比较等多种验证方式,在993行可以找到。源代码如下:
messages: {required: "This field is required.",remote: "Please fix this field.",email: "Please enter a valid email address.",url: "Please enter a valid URL.",date: "Please enter a valid date.",dateISO: "Please enter a valid date (ISO).",number: "Please enter a valid number.",digits: "Please enter only digits.",creditcard: "Please enter a valid credit card number.",equalTo: "Please enter the same value again.",maxlength: $.validator.format("Please enter no more than {0} characters."),minlength: $.validator.format("Please enter at least {0} characters."),rangelength: $.validator.format("Please enter a value between {0} and {1} characters long."),range: $.validator.format("Please enter a value between {0} and {1}."),max: $.validator.format("Please enter a value less than or equal to {0}."),min: $.validator.format("Please enter a value greater than or equal to {0}.")},
methods: {// http://docs.jquery.com/Plugins/Validation/Methods/requiredrequired: function( value, element, param ) {// check if dependency is metif ( !this.depend(param, element) ) {return "dependency-mismatch";}if ( element.nodeName.toLowerCase() === "select" ) {// could be an array for select-multiple or a string, both are fine this wayvar val = $(element).val();return val && val.length > 0;}if ( this.checkable(element) ) {return this.getLength(value, element) > 0;}return $.trim(value).length > 0;},// http://docs.jquery.com/Plugins/Validation/Methods/emailemail: function( value, element ) {// contributed by Scott Gonzalez: http://projects.scottsplayground.com/email_address_validation/return this.optional(element) || /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$/i.test(value);},
...
2、刨丁解牛
如果把想把消息改成中文的方式,可以直接把英文提示改成中文,这样太过生猛,破坏力太强。通常是写一个扩展文件,下节介绍。
本节想自己写一个中文提示,再加一些限制条件,如长度、范围等。
修改脚本myValidate1.js如下:
function lang(key) { mylang = { 'ls_input_name': '请输入您的用户名', 'ls_input_name_length': '用户名的长度为{0}位', 'ls_input_email': '请输入您的邮箱地址', 'ls_input_valid_email': '请输入正确邮箱地址','ls_input_cellphone':'请输入您的手机号','ls_input_valid_number':'请输入有效数字','ls_input_valid_cellphone':'请输入正确手机号码','ls_login_password': '请输入您的登录密码', 'ls_password_length': '密码长度为{0}-{1}位之间', 'ls_input_captcha': '请输入验证码', 'ls_equal_captcha': '请输入和密码相同的内容', }; return mylang[key]; } $(function(){$("#testForm").validate({rules: {loginName: { required: true, minlength: 2},password: { required: true , rangelength: [6, 12] },password2: { required: true , equalTo: "#password" } },messages:{loginName:{required: lang('ls_input_name'),minlength: lang('ls_input_name_length')},eMail:{required: lang('ls_input_email'),email: lang('ls_input_valid_email') },cellPhone:{required: lang('ls_input_cellphone'),number: lang('ls_input_valid_number'), mobile: lang('ls_input_valid_cellphone') },password:{required: lang('ls_login_password'),rangelength: lang('ls_password_length')},password2:{required: lang('ls_input_captcha'),equalTo: lang('ls_equal_captcha')}}});
});
重新运行测试表单validateTest.html,不填任何内容,点击确定按钮,结果如图:
中文提示终于出现了,别得意,还有多种验证方式呐
可叹,JQuery的精巧与迅捷,直指人心,痛快淋漓,让人折服。
3、游刃有余
jquery.validate.js 提供了基础的 电子邮件、URL、 日期等验证, 但是在实际开发中可能会有新的验证规则,这个需要我们自己定义一个,如上例中的mobile,就没有定义验证规则。故需要额外添加自定义校验 jquery.validate.extends.js。放在jquery.validate.js的后面,注意顺序不要颠倒:
<script src="js/jquery-1.8.3.js"></script>
<script src="js/jquery.validate.js"></script>
<script src="js/jquery.validate.extends.js"></script>
jquery.validate.extends.js代码如下:
jQuery.extend(jQuery.validator.messages, { required: "必选字段", remote: "请修正该字段", email: "请输入正确格式的电子邮件", url: "请输入合法的网址", date: "请输入合法的日期", dateISO: "请输入合法的日期 (ISO).", number: "请输入合法的数字", digits: "只能输入整数", creditcard: "请输入合法的信用卡号", equalTo: "请再次输入相同的值", accept: "请输入拥有合法后缀名的字符串", maxlength: jQuery.validator.format("允许的最大长度为 {0} 个字符"), minlength: jQuery.validator.format("允许的最小长度为 {0} 个字符"), rangelength: jQuery.validator.format("允许的长度为{0}和{1}之间"), range: jQuery.validator.format("请输入介于 {0} 和 {1} 之间的值"), max: jQuery.validator.format("请输入一个最大为 {0} 的值"), min: jQuery.validator.format("请输入一个最小为 {0} 的值")
});// 手机号码验证jQuery.validator.addMethod("mobile", function(value, element) {var length = value.length;//长度为11,以13,15,18开头的return this.optional(element) || (length == 11 && /^(((13[0-9]{1})|(15[0-9]{1})|(18[0-9]{1}))+\d{8})$/.test(value));}, "手机号码格式不对");
自定义验证方法(addMethod:name, method, message)就写了一个手机号码验证,如需新的验证方法,可自己添加。
修改脚本myValidate1.js 如下:
$(function(){$("#testForm").validate({rules: {loginName: { required: true, minlength: 2},password: { required: true , rangelength: [6, 12] },password2: { required: true , equalTo: "#password" } }});});
重新运行测试表单validateTest.html,填写测试内容,点击确定按钮,结果如图:
其实,校验规则既可以写到html的控件中,也可以写在js代码中,写在js中较整洁些。
http://www.douban.com/note/375865795/
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