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