本文实例讲述了Ajax异步方式实现登录与验证的详细代码，分享给大家供大家参考。具体如下：
登录代码
这个是使用Bootstrap3的组件功能实现的
<div class="login_con_R">
<h4>登录</h4>
<FORM id="loginFormId" class="form-horizontal" action="login" method="post">
<div class="form-group input-group">
<span class="input-group-addon"><span class="glyphicon glyphicon-user"></span></span>
<input type="text" class="form-control" placeholder="用户名" name="username" id="j_username" value="koala">
</div>
<div class="form-group input-group">
<span class="input-group-addon"><span class="glyphicon glyphicon-lock"></span></span>
<input type="password" name="password" id="j_password" class="form-control" placeholder="密码" value="888888"/>
</div>
<div class="form-group input-group" style="margin-top: 45px;">
<button type="button" class="btn btn-primary btn-block" id="loginBtn">登录</button>
</div>
</FORM>
</div>
异步登录请求的代码
<script>
$(function(){
var btnLogin = $('#loginBtn');
var form = $('#loginFormId');
$('body').keydown(function(e) {
if (e.keyCode == 13) {
dologin();
}
});
btnLogin.on('click',function() {
dologin();
});
var dologin = function() {
var userNameElement = $("#j_username");
var passwordElement = $("#j_password");
var username = userNameElement.val();
var password = passwordElement.val();
if (!Validation.notNull($('body'), userNameElement, username, '用户名不能为空')) {
return false;
}
if (!Validation.notNull($('body'), passwordElement, password, '密码不能为空')) {
return false;
}
btnLogin.attr('disabled', 'disabled').html('正在登录...');
var param = form.serialize();
$.ajax({
url: contextPath+"/login.koala",
dataType: "json",
data: param,
type: "POST",
success: function(data){
if(data.success){
$('.login_con_R').message({
type: 'success',
content: '登录成功！'
});
/*这里使用的异步请求，当请求登录成功的时候，重新定位到index界面*/
window.location.href=contextPath+"/index.koala";
}else{
btnLogin.removeAttr('disabled').html('登录');
$('.login_con_R').message({
type: 'error',
content: data.errorMessage
});
}
}
});
};
});
</script>
使用到的验证js代码Validation.js
Validator = {
Require : {expression:/.+/,errorMsg:"该字段不能为空"},
Email : {expression:/^\w+([-+.]\w+)*@\w+([-.]\\w+)*\.\w+([-.]\w+)*$/,errorMsg:"Email格式不正确"},
Mobile:{expression:/^(1[3|5|8]{1}\d{9})$/,errorMsg:"手机格式不正确"},
TelePhone:{expression:/^(((0\d{2,3}-)?\d{7,8}(-\d{4})?))$/,errorMsg:"电话号码格式不正确"},
IdCard:{expression:/^\d{15}(\d{2}[A-Za-z0-9])?$/,errorMsg:"身份证号码格式不正确"},
Number:{expression:/^-?(\d+|[1-9]\d*\.\d+|0\.\d*[1-9]\d*|0?\.0+|0)$/,errorMsg:"仅支持数字"},
English:{expression:/^[A-Za-z]+$/,errorMsg:"仅支持英文字符"},
Chinese:{expression:/^[\u0391-\uFFE5]+$/,errorMsg:"仅支持中文字符"},
URL:{expression:/^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/,errorMsg:"URL地址格式不正确"},
Regex:{errorMsg:"格式不正确"},
UnSafe : /^(([A-Z]*|[a-z]*|\d*|[-_\~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\\\/\'\"]*)|.{0,5})$|\s/,
IsSafe : function(str){return !this.UnSafe.test(str);},
SafeString : {expression:"this.IsSafe(value)",errorMsg:"仅支持中文字符"},
ErrorItem : [document.forms[0]],
ErrorMessage : ["以下原因导致提交失败：\t\t\t\t"],
Validate : function(theForm, mode){
var obj = theForm || event.srcElement;
var count = obj.elements.length;
this.ErrorMessage.length = 1;
this.ErrorItem.length = 1;
this.ErrorItem[0] = obj;
for(var i=0;i<count;i++){
with(obj.elements[i]){
if(disabled)continue;
var _dataType = getAttribute("dataType");
if(typeof(_dataType) == "object" || typeof(this[_dataType]) == "undefined") continue;
this.ClearState(obj.elements[i]);
if(getAttribute("require") == "false" && value == "") continue;
var errorMsg = getAttribute("errorMsg")? getAttribute("errorMsg") : this[_dataType].errorMsg;
errorMsg = errorMsg || "invalid";
var validateExpr = getAttribute("validateExpr");
validateExpr = validateExpr || this[_dataType].expression;
switch(_dataType){
case "Date" :
case "Repeat" :
case "Range" :
case "Compare" :
case "Custom" :
case "Group" :
case "Limit" :
case "LimitB" :
case "SafeString" :
if(!eval(validateExpr)) {
this.AddError(i, errorMsg);
}
break;
default :
if(!eval(validateExpr).test(value)){
this.AddError(i, errorMsg);
}
break;
}
}
}
if(this.ErrorMessage.length > 1){
var content = this.ErrorMessage[1].replace(/\d+:/," ");
var $element = $(this.ErrorItem[1]);
var name = $element.attr('name');
if(name.indexOf('DTO') != -1){
name = name.split('.')[1];
}
var $targetElement = $element;
var $tempElement = $targetElement.closest('form').find('#' + name + 'ID');
if($tempElement.hasClass('select')){
$targetElement = $tempElement;
}
showErrorMessage($element.closest('.modal'), $targetElement, content);
return false;
}
return true;
},
limit : function(len,min, max){
min = min || 0;
max = max || Number.MAX_VALUE;
return min <= len && len <= max;
},
LenB : function(str){
return str.replace(/[^\x00-\xff]/g,"**").length;
},
ClearState : function(elem){
with(elem){
if(style.color == "red")
style.color = "";
var ligertipid = getAttribute("ligertipid");
if(ligertipid && ligertipid != ""){
removeAttribute("ligertipid");
$(elem).ligerHideTip();
}
}
},
AddError : function(index, str){
this.ErrorItem[this.ErrorItem.length] = this.ErrorItem[0].elements[index];
this.ErrorMessage[this.ErrorMessage.length] = this.ErrorMessage.length + ":" + str;
},
Exec : function(op, reg){
return new RegExp(reg,"g").test(op);
},
compare : function(op1,operator,op2){
switch (operator) {
case "NotEqual":
return (op1 != op2);
case "GreaterThan":
return (op1 > op2);
case "GreaterThanEqual":
return (op1 >= op2);
case "LessThan":
return (op1 < op2);
case "LessThanEqual":
return (op1 <= op2);
default:
return (op1 == op2);
}
},
MustChecked : function(name, min, max){
var groups = document.getElementsByName(name);
var hasChecked = 0;
min = min || 1;
max = max || groups.length;
for(var i=groups.length-1;i>=0;i--)
if(groups[i].checked) hasChecked++;
return min <= hasChecked && hasChecked <= max;
},
IsDate : function(op, formatString){
formatString = formatString || "ymd";
var m, year, month, day;
switch(formatString){
case "ymd" :
m = op.match(new RegExp("^\\s*((\\d{4})|(\\d{2}))([-./])(\\d{1,2})\\4(\\d{1,2})\\s*$"));
if(m == null ) return false;
day = m[6];
month = m[5]--;
year = (m[2].length == 4) ? m[2] : GetFullYear(parseInt(m[3], 10));
break;
case "dmy" :
m = op.match(new RegExp("^\\s*(\\d{1,2})([-./])(\\d{1,2})\\2((\\d{4})|(\\d{2}))\\s*$"));
if(m == null ) return false;
day = m[1];
month = m[3]--;
year = (m[5].length == 4) ? m[5] : GetFullYear(parseInt(m[6], 10));
break;
default :
break;
}
var date = new Date(year, month, day);
return (typeof(date) == "object" && year == date.getFullYear() && month == date.getMonth() && day == date.getDate());
function GetFullYear(y){return ((y<30 ? "20" : "19") + y)|0;}
}
};
var Validation = {
notNull: function($container, $element, content, errorMessage) {
if (isNull(content)) {
showErrorMessage($container, $element, errorMessage);
return false;
}
return true;
},
email: function($container, $element, content, errorMessage) {
var reg = new RegExp(/^(\w)+(\.\w+)*@(\w)+((\.\w{2,3}){1,3})$/);
if (!reg.test(content)) {
showErrorMessage($container, $element, errorMessage);
return false;
}
return true;
},
serialNmuber: function($container, $element, content, errorMessage) {
var reg = new RegExp(/^[0-9a-zA-Z_-]*$/);
if (!reg.test(content)) {
showErrorMessage($container, $element, errorMessage);
return false;
}
return true;
},
number: function($container, $element, content, errorMessage) {
var reg = new RegExp(/^[0-9]*$/);
if (!reg.test(content)) {
showErrorMessage($container, $element, errorMessage);
return false;
}
return true;
},
humanName: function($container, $element, content, errorMessage) {
var reg = new RegExp(/(^[A-Z a-z]*$)|(^[\u4e00-\u9fa5]*$)/);
if (!reg.test(content)) {
showErrorMessage($container, $element, errorMessage);
return false;
}
return true;
},
checkByRegExp: function($container, $element, regExp, content, errorMessage){
var reg = new RegExp(regExp);
if (!reg.test(content)) {
showErrorMessage($container, $element, errorMessage);
return false;
}
return true;
}
};
/**
* 检查是否为空
*/
var isNull = function(item){
if(item == null || item == "" || item.replace(/(^\s*)|(\s*$)/g, "") == "" ){
return true;
}
return false;
};
/**
* 显示提示信息
*/
var showErrorMessage = function($container, $element, content){
$element.popover({
content: content,
trigger: 'manual',
container: $container
}).popover('show').on({
'blur': function(){
$element.popover('destroy');
$element.parent().removeClass('has-error');
},
'keydown': function(){
$element.popover('destroy');
$element.parent().removeClass('has-error');
}
}).focus().parent().addClass('has-error');
};
希望本文所述对大家学习有所帮助。
