jquery validate 详解一

原文：http://blog.sina.com.cn/s/blog_608475eb0100h3h1.html

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

一导入js库

 <script src="../js/jquery.js" type="text/javascript"></script>

 <script src="../js/jquery.validate.js" type="text/javascript"></script>

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

 <script src="../js/jquery.js" type="text/javascript"></script>

 <script src="../js/jquery.validate.js" type="text/javascript"></script>

 <script src="./js/jquery.metadata.js" type="text/javascript"></script>

 $().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:

   },

   confirm_password: {

    required: true,

    minlength: ,

    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

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