jquery validate 详解一（转载）

???????? jQuery 校验

官网地址：http://bassistance.de/jquery-plugins/jquery-plugin-validation

一导入 js 库

二、默认校验规则

(1)required:true?????????????? 必输字段
(2)remote:"check.php"????????? 使用ajax 方法调用check.php 验证输入值
(3)email:true????????????????? 必须输入正确格式的电子邮件
(4)url:true??????????????????? 必须输入正确格式的网址
(5)date:true?????????????????? 必须输入正确格式的日期日期校验ie6 出错，慎用
(6)dateISO:true??????????????? 必须输入正确格式的日期(ISO) ，例如：2009-06-23 ，1998/01/22 只验证格式，不验证有效性
(7)number:true???????????????? 必须输入合法的数字( 负数，小数)
(8)digits:true???????????????? 必须输入整数
(9)creditcard:???????????????? 必须输入合法的信用卡号
(10)equalTo:"#field"?????????? 输入值必须和#field 相同
(11)accept:??????????????????? 输入拥有合法后缀名的字符串（上传文件的后缀）
(12)maxlength:5??????????????? 输入长度最多是5 的字符串( 汉字算一个字符)
(13)minlength:10?????????????? 输入长度最小是10 的字符串( 汉字算一个字符)
(14)rangelength:[5,10]???????? 输入长度必须介于 5 和 10 之间的字符串")( 汉字算一个字符)
(15)range:[5,10]?????????????? 输入值必须介于 5 和 10 之间
(16)max:5????????????????????? 输入值不能大于5
(17)min:10???????????????????? 输入值不能小于10

三、默认的提示

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).",
??? dateDE: "Bitte geben Sie ein g 眉ltiges Datum ein.",
??? number: "Please enter a valid number.",
??? numberDE: "Bitte geben Sie eine Nummer ein.",
??? digits: "Please enter only digits",
??? creditcard: "Please enter a valid credit card number.",
??? equalTo: "Please enter the same value again.",
??? accept: "Please enter a value with a valid extension.",
??? 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}.")
},

如需要修改，可在js 代码中加入：

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(" 请输入一个长度最多是 {0} 的字符串"),
??minlength: jQuery.validator.format(" 请输入一个长度最少是 {0} 的字符串"),
??rangelength: jQuery.validator.format(" 请输入一个长度介于 {0} 和 {1} 之间的字符串"),
??range: jQuery.validator.format(" 请输入一个介于 {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")
});

推荐做法，将此文件放入messages_cn.js 中，在页面中引入
<script src="../js/messages_cn.js" type="text/javascript"></script>

四、使用方式

1. 将校验规则写到控件中

$().ready(function() {
?$("#signupForm").validate();
});

<form id="signupForm" method="get" action="">
??? <p>
??????? <label for="firstname">Firstname</label>
??????? <input id="firstname" name="firstname" class="required" />
??? </p>
?<p>
??<label for="email">E-Mail</label>
??<input id="email" name="email" class="required email" />
?</p>
?<p>
??<label for="password">Password</label>
??<input id="password" name="password" type="password" class="{required:true,minlength:5}" />
?</p>
?<p>
??<label for="confirm_password"> 确认密码</label>
??<input id="confirm_password" name="confirm_password" type="password" class="{required:true,minlength:5,equalTo:'#password'}" />
?</p>
??? <p>
??????? <input class="submit" type="submit" value="Submit"/>
??? </p>
</form>

使用class="{}" 的方式，必须引入包：jquery.metadata.js

可以使用如下的方法，修改提示内容：
class="{required:true,minlength:5,messages:{required:' 请输入内容'}}"

在使用equalTo 关键字时，后面的内容必须加上引号，如下代码：
class="{required:true,minlength:5,equalTo:'#password'}"

2. 将校验规则写到 js 代码中

$().ready(function() {
?$("#signupForm").validate({
??????? rules: {
???firstname: "required",
???email: {
????required: true,
????email: true
???},
???password: {
????required: true,
????minlength: 5
???},
???confirm_password: {
????required: true,
????minlength: 5,
????equalTo: "#password"
???}
??},
??????? messages: {
???firstname: " 请输入姓名",
???email: {
????required: " 请输入Email 地址",
????email: " 请输入正确的email 地址"
???},
???password: {
????required: " 请输入密码",
????minlength: jQuery.format(" 密码不能小于{0} 个字符")
???},
???confirm_password: {
????required: " 请输入确认密码",
????minlength: " 确认密码不能小于5 个字符",
????equalTo: " 两次输入密码不一致不一致"
???}
??}
??? });
});

//messages 处，如果某个控件没有message ，将调用默认的信息

<form id="signupForm" method="get" action="">
??? <p>
??????? <label for="firstname">Firstname</label>
??????? <input id="firstname" name="firstname" />
??? </p>
?<p>
??<label for="email">E-Mail</label>
??<input id="email" name="email" />
?</p>
?<p>
??<label for="password">Password</label>
??<input id="password" name="password" type="password" />
?</p>
?<p>
??<label for="confirm_password"> 确认密码</label>
??<input id="confirm_password" name="confirm_password" type="password" />
?</p>
??? <p>
??????? <input class="submit" type="submit" value="Submit"/>
??? </p>
</form>

required:true 必须有值
required:"#aa:checked" 表达式的值为真，则需要验证
required:function(){} 返回为真，表时需要验证
后边两种常用于，表单中需要同时填或不填的元素