需要在伺服器上進行哈 jquery的ajax方法: // jquery請求 $.ajax({ url: "./server/slider.json", type: "post", dataType: "json", async: true, success: function(datas) { re ...
需要在伺服器上進行哈
jquery的ajax方法:
// jquery請求 $.ajax({ url: "./server/slider.json", type: "post", dataType: "json", async: true, success: function(datas) { renderData(datas.slider); } }) // jquery渲染數據 function renderData(data) { var str = ""; $.each(data, function(index, obj) { str += '<a href="' + obj.linkUrl + '"><img src="' + obj.picUrl + '"></a>' }) $("#banner_jq").html(str); }
跨域請求,封裝jsonp函數
function getJSONP(url, callback) { if (!url) { return; } var a = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j']; //定義一個數組以便產生隨機函數名 var r1 = Math.floor(Math.random() * 10); var r2 = Math.floor(Math.random() * 10); var r3 = Math.floor(Math.random() * 10); var name = 'getJSONP' + a[r1] + a[r2] + a[r3]; var cbname = 'getJSONP.' + name; //作為jsonp函數的屬性 if (url.indexOf('?') === -1) { url += '?jsonp=' + cbname; } else { url += '&jsonp=' + cbname; } var script = document.createElement('script'); //定義被腳本執行的回調函數 getJSONP[name] = function(e) { try { callback && callback(e); } catch (e) { // } finally { //最後刪除該函數與script元素 delete getJSONP[name]; script.parentNode.removeChild(script); } } script.src = url; document.getElementsByTagName('head')[0].appendChild(script); } // 跨域調用 getJSONP('http://class.imooc.com/api/jsonp', function(response) { console.log(response); });
json和ajax登錄功能
index.html
<!DOCTYPE html> <html lang="en"> <head> <title>Register</title> <meta charset="utf-8"> <link rel="stylesheet" type="text/css" href="css/style.css"> </head> <body> <div class="register"> <p class="title" id="title"> <span>登 錄</span> <span class="current">註 冊</span> </p> <div class="form"> <div> <span>+86</span> <input type="text" name="user" id="user" placeholder="請輸入註冊手機號" autocomplete="off"/> <i id="user_icon"></i> <p class="info" id="user_info"></p> </div> <div> <input type="password" name="pwd" id="pwd" placeholder="請設置密碼"> <i id="pwd_icon"></i> <p class="info" id="pwd_info"></p> </div> <p class="button"> <a href="javascript:void(0)" id="sigup-btn" class="btn show">註 冊</a> <a href="javascript:void(0)" id="login-btn" class="btn">登 錄</a> </p> </div> </div> <script type="text/javascript" src="js/ajax.js"></script> <script type="text/javascript"> var user = document.getElementById("user"), pwd = document.getElementById("pwd"), sigup = document.getElementById("sigup-btn"), login = document.getElementById("login-btn"), titles = document.getElementById("title").getElementsByTagName("span"); userInfo = document.getElementById("user_info"), userIcon = document.getElementById("user_icon") pwdInfo = document.getElementById("pwd_info"), pwdIcon = document.getElementById("pwd_icon"), userReg = /^1[3578]\d{9}$/, pwdReg = /^\w{5,12}$/, isRepeat = false; // 記錄用戶名是否被占用 // 檢測用戶 function checkUser(){ var userVal = user.value; // 驗證手機號是否有效 if(!userReg.test(userVal)){ userInfo.innerHTML = '手機號碼無效!'; userIcon.className = 'no'; }else{ userInfo.innerHTML = ''; userIcon.className = ''; // 發起請求 $.ajax({ url:'http://localhost/register/server/isUserRepeat.php', data:{username:userVal}, success:function(data){ if(data.code == 1){ userIcon.className = 'ok'; isRepeat = false; }else if(data.code == 0){ userIcon.className = 'no'; isRepeat = true; userInfo.innerHTML = data.msg; }else{ userInfo.innerHTML = '檢測失敗,請重試...'; } } }) } } // 檢測密碼 function checkPwd(){ var pwdVal = pwd.value; if(!pwdReg.test(pwdVal)){ pwdInfo.innerHTML = '請輸入5到12位的字母、數字及下劃線'; pwdIcon.className = 'no'; }else{ pwdInfo.innerHTML = ''; pwdIcon.className = 'ok'; } } // 註冊 function register(){ var user_val = user.value, pwd_val = pwd.value; // 如果手機號有效且沒有被占用,同時密碼合法,方可註冊 if(userReg.test(user_val) && pwdReg.test(pwd_val) && !isRepeat){ // 發起請求,實現註冊 $.ajax({ url:"http://localhost/register/server/register.php", method:"post", data:{username:user_val,userpwd:pwd_val}, success:function(data){ alert("註冊成功,請登錄!"); // 調用顯示登錄界面 showLogin(); // 清空文本框 user.value = ""; pwd.value = ""; }, error:function(){ pwdInfo.innerHTML = '註冊失敗,請重試!'; } }) } } // 顯示登錄 function showLogin(){ // 載入登錄界面,登錄高亮顯示 titles[0].className = "current"; titles[1].className = ""; login.className = "show"; sigup.className = ""; } // 顯示註冊 function showSigup(){ // 載入註冊界面,註冊高亮顯示 titles[1].className = "current"; titles[0].className = ""; login.className = ""; sigup.className = "show"; } // 綁定事件,檢測用戶的有效性及是否註冊過 user.addEventListener("blur",checkUser,false); // 綁定事件,檢測密碼的有效性 pwd.addEventListener("blur",checkPwd,false); // 註冊 sigup.addEventListener("click",register,false); // 登錄高亮 titles[0].addEventListener("click",showLogin,false); // 註冊高亮 titles[1].addEventListener("click",showSigup,false); </script> </body> </html>
style.css
*{ margin:0; padding:0; } body{ background:#333; } .register{ width:300px; height:270px; margin:80px auto; padding:15px 30px; background:#eee; border-radius:5px; } .title{ height:35px; } .title span{ font-size:16px; font-weight:bold; color:#666; margin-right:30px; cursor:pointer; } .title span.current{ color:#f00; } .form div{ width:290px; height:30px; border-radius:8px; background:#fff; margin-bottom:40px; padding:8px 10px; position:relative; } .form div span{ display:inline-block; padding-top:8px; padding-right:3px; color:#666; } .form div input{ border:none; outline:none; font-size:17px; color:#666; background:none; } .form div i{ position:absolute; width:16px; height:16px; right:12px; top:14px; } .form div i.ok{ background:url(../img/icon.png) no-repeat 0 -67px; } .form div i.no{ background:url(../img/icon.png) no-repeat -17px -67px; } .form .info{ margin-top:22px; color:#f00; padding-left:2px; } .button{ padding-top:7px; } .button a{ display:none; width:100%; height:45px; line-height:45px; text-align:center; text-decoration:none; background:#f20d0d; color:#fff; border-radius:30px; font-size:16px; } .button a.show{ display:block; }
ajax.js
var $ = { ajax:function(options){ var xhr = null, // XMLHttpRequest對象 url = options.url, // url地址 method = options.method || 'get', // 傳輸方式,預設為get async = typeof(options.async) === "undefined"?true:options.async, data = options.data || null, // 參數 params = '', callback = options.success, // ajax請求成功的回調函數 error = options.error; // 將data的對象字面量的形式轉換為字元串形式 if(data){ for(var i in data){ params += i + '=' + data[i] + '&'; } params = params.replace(/&$/,""); } // 根據method的值改變url if(method === "get"){ url += '?'+params; } if(typeof XMLHttpRequest != "undefined"){ xhr = new XMLHttpRequest(); }else if(typeof ActiveXObject != "undefined"){ // 將所有可能出現的ActiveXObject版本放在一個數組中 var xhrArr = ['Microsoft.XMLHTTP','MSXML2.XMLHTTP.6.0','MSXML2.XMLHTTP.5.0','MSXML2.XMLHTTP.4.0','MSXML2.XMLHTTP.3.0','MSXML2.XMLHTTP.2.0']; // 遍歷創建XMLHttpRequest對象 var len = xhrArr.length; for(var i = 0;i<len;i++){ try{ // 創建XMLHttpRequest對象 xhr = new ActiveXObject(xhrArr[i]); break; } catch(ex){ } } }else{ throw new Error('No XHR object availabel.'); } xhr.onreadystatechange = function(){ if(xhr.readyState === 4){ if((xhr.status >=200 && xhr.status <300) || xhr.status === 304){ callback && callback(JSON.parse(xhr.responseText)) }else{ error && error(); } } } // 創建發送請求 xhr.open(method,url,async); xhr.setRequestHeader("Content-type","application/x-www-form-urlencoded"); xhr.send(params); }, jsonp:function(){ // 跨域 } }
isUserRepeat.php
<?php header('Content-Type:application/json'); $isUsername = array_key_exists('username',$_REQUEST); $username = $isUsername ? $_REQUEST['username'] : ''; if(!$username){ $msg = printMsg('參數有誤',2); echo json_encode($msg); exit(); } function printMsg($msg,$code){ return array('msg'=>$msg,'code'=>$code); } // 記錄存儲用戶的文件路徑 $fileStr = __DIR__.'/user.json'; // 讀取現存的用戶名和密碼 $fileStream = fopen($fileStr,'r'); $fileContent = fread($fileStream,filesize($fileStr)); $fileContent_array = $fileContent ? json_decode($fileContent,true) : array(); fclose($fileStream); // 判斷用戶名是否有重覆的 $isrepeat = false; foreach($fileContent_array as $key=>$val){ if($val['username'] === $username){ $isrepeat = true; break; } } if($isrepeat){ $msg = printMsg('用戶名重覆',0); echo json_encode($msg); exit(); } $msg = printMsg('用戶名可用',1); echo json_encode($msg); ?>
register.php
<?php header('Content-Type:application/json'); // 獲取前端傳遞的註冊信息 欄位為 username userpwd $isUsername = array_key_exists('username',$_REQUEST); $isUserpwd = array_key_exists('userpwd',$_REQUEST); $username = $isUsername ? $_REQUEST['username'] : ''; $userpwd = $isUserpwd ? $_REQUEST['userpwd'] : ''; function printMsg($msg,$code){ return array('msg'=>$msg,'code'=>$code); } if(!$username || !$userpwd){ $msg = printMsg('參數有誤',0); echo json_encode($msg); exit(); } // 記錄存儲用戶的文件路徑 $fileStr = __DIR__.'/user.json'; // 讀取現存的用戶名和密碼 $fileStream = fopen($fileStr,'r'); $fileContent = fread($fileStream,filesize($fileStr)); $fileContent_array = $fileContent ? json_decode($fileContent,true) : array(); fclose($fileStream); // 判斷用戶名是否有重覆的 $isrepeat = false; foreach($fileContent_array as $key=>$val){ if($val['username'] === $username){ $isrepeat = true; break; } } if($isrepeat){ $msg = printMsg('用戶名重覆',0); echo json_encode($msg); exit(); } array_push($fileContent_array,array('username'=>$username,'userpwd'=>$userpwd)); // 將存儲的用戶名密碼寫入 $fileStream = fopen($fileStr,'w'); fwrite($fileStream,json_encode($fileContent_array)); fclose($fileStream); echo json_encode(printMsg('註冊成功',1)); ?>
user.json
[{"username":"zhangsan","userpwd":"zhangsan"},{"username":"lisi","userpwd":"lisi"},{"username":"134","userpwd":"sdfsdf"},{"username":"135","userpwd":"dsff"},{"username":"136","userpwd":"dsff"},{"username":"13521554677","userpwd":"sdfsdf"},{"username":"13521557890","userpwd":"sdfsdf"},{"username":"13521557891","userpwd":"sdfsdf"},{"username":"13810701234","userpwd":"sdfsdf"},{"username":"13810709999","userpwd":"shitou051031"},{"username":"13810709998","userpwd":"sdfsdfdsf"},{"username":"13412345678","userpwd":"shitou"}]
雜七雜八的知識點:
jQuery 點擊事件中觸發的方式:
mousedown和mouseup事件滑鼠左鍵點擊和滑鼠右鍵點擊都是可以實現的;
click和dblclick事件只有滑鼠左鍵點擊才能實現
// jquery渲染數據
function renderData(data) {
var str = "";
$.each(data, function(index, obj) {
str += '<a href="' + obj.linkUrl + '"><img src="' + obj.picUrl + '"></a>'
})
$("#banner_jq").html(str);
}