Java學習總計(二十六)——JavaScript正則表達式,Js表單驗證,原生js+css頁面時鐘
阿新 • • 發佈:2018-06-28
text 先來 helloword 郵箱 用戶名 就是 lac round 外部 一.JavaScript正則表達式
1.exec檢索字符串中指定的值,返回找到的值,並確定其位置
2.test檢索字符串中指定的值,返回true或false
3.正則表達式對象的創建:
(1)方式一:
Var rgex=new RegExp(“[0-9]”,”模式”);
(2)方式二:簡便寫法,用雙斜杠//把正則表達式的內容括起來
例1(正則創建,使用test()方法):
1.exec檢索字符串中指定的值,返回找到的值,並確定其位置
2.test檢索字符串中指定的值,返回true或false
3.正則表達式對象的創建:
(1)方式一:
Var rgex=new RegExp(“[0-9]”,”模式”);
(2)方式二:簡便寫法,用雙斜杠//把正則表達式的內容括起來
例1(正則創建,使用test()方法):
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>正則驗證01</title> <script type="text/javascript"> var str="helloword"; var regx=/^[A-Z0-9]+$/i;//i用於忽略大小寫 var falg=regx.test(str); alert(falg); </script> </head> <body> </body> </html>
運行結果:
二.javaScript完成表單驗證
1.先來了解幾個相關事件:
(1)onsubmit 表單的提交事件 值是return true 表單能提交到後臺
(2)onblur 表單失去焦點
2.代碼舉例說明表單驗證:
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style type="text/css"> input{ margin-top: 10px; } font{ font-size: 11px; } </style> </head> <body style="text-align: center;"> <div style="width: 300px;height: 400px; border: 1px solid black;margin-left: 500px; background-color: ivory;"> <h3> 註冊界面</h3> <form method="post" action="https://www.2345.com/?38264-0010" onsubmit="return checkAll()"> 用戶名:<input type="text" id="uname" value="" placeholder="用戶名是6-12字母" name="username" onblur="checkUsername()" /><br /> <span id="us"></span><br> 密 碼:<input type="password" id="upwd" value="" placeholder="密碼是6-12數字" name="pwd" onblur="checkPwd()"/><br /> <span id="up"></span><br> 郵 箱:<input type="text" id="Email" value="" placeholder="郵箱按正確格式填寫" name="Email" onblur="checkEmail()"/><br /> <span id="em"></span><br> <div style="margin-top: 15px;"><a href="regular01.html">註意事項</a></div> <input id="ra" type="radio" name="xieyi" value="xieyi" onclick="checkRedio()"> 我已閱讀並同意網絡協議<br /> <input type="submit" value="註冊" /> <input style="margin-left: 15px" type="reset" value="重置" onclick="checkClear()"/> </form> </div> <script type="text/javascript"> //驗證用戶名 function checkUsername(){ var v = document.getElementById("uname").value; var regx = /^[a-z]{6,12}$/i; var falg=regx.test(v); var us=document.getElementById("us"); if(falg){ us.innerHTML="<font color=‘green‘>用戶名規則正確..</font>" }else{ us.innerHTML="<font color=‘red‘>用戶名規則錯誤!!</font>" } return falg; } //驗證密碼 function checkPwd(){ var pwd=document.getElementById("upwd").value; var regx = /^[0-9]{6,12}$/; var falg1=regx.test(pwd); var up=document.getElementById("up"); if(falg1){ up.innerHTML="<font color=‘green‘>密碼規則正確..</font>" }else{ up.innerHTML="<font color=‘red‘>密碼規則錯誤!!</font>" } return falg1; } //驗證郵箱 function checkEmail(){ var email=document.getElementById("Email").value; //郵箱正則 var regx=/^[A-Za-z\d]+([-_.][A-Za-z\d]+)*@([A-Za-z\d]+[-.])+[A-Za-z\d]{2,4}$/; var falg2=regx.test(email); var em=document.getElementById("em"); if(falg2){ em.innerHTML="<font color=‘green‘>郵箱規則正確..</font>" }else{ em.innerHTML="<font color=‘red‘>郵箱規則錯誤!!</font>" } return falg2; } //重置功能擴展 function checkClear(){ var us=document.getElementById("us"); var up=document.getElementById("up"); var em=document.getElementById("em"); up.innerHTML=null; us.innerHTML=null; em.innerHTML=null; } //驗證單選框 function checkRedio(){ var cho=document.getElementById("ra"); var flag3=true; if(cho.checked==true){ return flag3; }else{ alert("sorry,請先閱讀網絡協....") flag3 =false; return flag3; } } //驗證所有,都正確就提交 function checkAll(){ return checkUsername() && checkPwd() && checkEmail() && checkRedio(); } </script> </body> </html>
運行結果展示:
1.初始界面:
2.表單驗證(錯誤輸入):
3.重置展示:
4.表單驗證正確輸入(單選框未選中點擊註冊):
5.單驗證正確輸入(單選框選中點擊註冊):
跳轉:
三.頁面時鐘的展示
1.基本思路就是讓每隔一秒更新一次當前時間
2.簡易代碼:
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>頁面時鐘</title> </head> <body> <div id="mytime">haha</div> </body> <script type="text/javascript"> function showTime(){ var ti=document.getElementById("mytime"); var nowTime=new Date().toLocaleString(); ti.innerHTML=nowTime; } //手動調用 showTime(); //設置定時器 window.setInterval(‘showTime()‘,1000) </script> </html>
運行結果:
第二次截圖:
3.引用代碼:
地址鏈接:https://www.cnblogs.com/syp172654682/p/7588104.html
寫的很好,特借鑒過來
引用代碼復制:
外部CSS代碼:
/* 全局 */
* {
margin: 0;
padding: 0;
}
.clock {
width: 400px;
height: 400px;
border: 10px solid #333;
box-shadow: 0px 0px 20px 3px #444 inset;
border-radius: 210px;
position: relative;
margin: 5px auto;
z-index: 10;
background-color: #f6f6f6;
}
/* 時鐘數字 */
.clock-num {
width: 40px;
height: 40px;
font-size: 22px;
text-align: center;
line-height: 40px;
position: absolute;
z-index: 8;
color: #555;
font-family: fantasy, ‘Trebuchet MS‘;
}
.em_num {
font-size: 28px;
}
/* 指針 */
.clock-line {
position: absolute;
z-index: 20;
}
.hour-line {
width: 100px;
height: 4px;
top: 198px;
left: 200px;
background-color: #000;
border-radius: 2px;
transform-origin: 0 50%;
box-shadow: 1px -3px 8px 3px #aaa;
}
.minute-line {
width: 130px;
height: 2px;
top: 199px;
left: 190px;
background-color: #000;
transform-origin: 7.692% 50%;
box-shadow: 1px -3px 8px 1px #aaa;
}
.second-line {
width: 170px;
height: 1px;
top: 199.5px;
left: 180px;
background-color: #f60;
transform-origin: 11.765% 50%;
box-shadow: 1px -3px 7px 1px #bbb;
}
/* 原點 */
.origin {
width: 20px;
height: 20px;
border-radius: 10px;
background-color: #000;
position: absolute;
top: 190px;
left: 190px;
z-index: 14;
}
/* 日期 時間 */
.date-info {
width: 160px;
height: 28px;
line-height: 28px;
text-align: center;
position: absolute;
top: 230px;
left: 120px;
z-index: 11;
color: #555;
font-weight: bold;
font-family: ‘微軟雅黑‘;
}
.time-info {
width: 92px;
height: 30px;
line-height: 30px;
text-align: center;
position: absolute;
top: 270px;
left: 154px;
z-index: 11;
background-color: #555;
padding: 0;
box-shadow: 0px 0px 9px 2px #222 inset;
}
.time {
width: 30px;
height: 30px;
text-align: center;
float: left;
color: #fff;
font-weight: bold;
}
#minute-time {
border-left: 1px solid #fff;
border-right: 1px solid #fff;
}
/* 刻度 */
.clock-scale {
width: 195px;
height: 2px;
transform-origin: 0% 50%;
z-index: 7;
position: absolute;
top: 199px;
left: 200px;
}
.scale-show {
width: 12px;
height: 2px;
background-color: #555;
float: left;
}
.scale-hidden {
width: 183px;
height: 2px;
float: left;
}
外部js代碼:
(function() {
window.onload = initNumXY(200, 160, 40, 40);
var hour_line = document.getElementById("hour-line");
var minute_line = document.getElementById("minute-line");
var second_line = document.getElementById("second-line");
var date_info = document.getElementById("date-info");
var week_day = [
‘星期日‘, ‘星期一‘, ‘星期二‘, ‘星期三‘, ‘星期四‘, ‘星期五‘, ‘星期六‘
];
var hour_time = document.getElementById("hour-time");
var minute_time = document.getElementById("minute-time");
var second_time = document.getElementById("second-time");
function setTime() {
var this_day = new Date();
var hour = (this_day.getHours() >= 12) ?
(this_day.getHours() - 12) : this_day.getHours();
var minute = this_day.getMinutes();
var second = this_day.getSeconds();
var hour_rotate = (hour * 30 - 90) + (Math.floor(minute / 12) * 6);
var year = this_day.getFullYear();
var month = ((this_day.getMonth() + 1) < 10) ?
"0" + (this_day.getMonth() + 1) : (this_day.getMonth() + 1);
var date = (this_day.getDate() < 10) ?
"0" + this_day.getDate() : this_day.getDate();
var day = this_day.getDay();
hour_line.style.transform = ‘rotate(‘ + hour_rotate + ‘deg)‘;
minute_line.style.transform = ‘rotate(‘ + (minute * 6 - 90) + ‘deg)‘;
second_line.style.transform = ‘rotate(‘ + (second * 6 - 90) + ‘deg)‘;
date_info.innerHTML =
year + "-" + month + "-" + date + " " + week_day[day];
hour_time.innerHTML = (this_day.getHours() < 10) ?
"0" + this_day.getHours() : this_day.getHours();
minute_time.innerHTML = (this_day.getMinutes() < 10) ?
"0" + this_day.getMinutes() : this_day.getMinutes();
second_time.innerHTML = (this_day.getSeconds() < 10) ?
"0" + this_day.getSeconds() : this_day.getSeconds();
}
setInterval(setTime, 1000);
function initNumXY(R, r, w, h) {
var numXY = [{
"left": R + 0.5 * r - 0.5 * w,
"top": R - 0.5 * r * 1.73205 - 0.5 * h
}, {
"left": R + 0.5 * r * 1.73205 - 0.5 * w,
"top": R - 0.5 * r - 0.5 * h
}, {
"left": R + r - 0.5 * w,
"top": R - 0.5 * h
}, {
"left": R + 0.5 * r * 1.73205 - 0.5 * w,
"top": R + 0.5 * r - 0.5 * h
}, {
"left": R + 0.5 * r - 0.5 * w,
"top": R + 0.5 * r * 1.732 - 0.5 * h
}, {
"left": R - 0.5 * w,
"top": R + r - 0.5 * h
}, {
"left": R - 0.5 * r - 0.5 * w,
"top": R + 0.5 * r * 1.732 - 0.5 * h
}, {
"left": R - 0.5 * r * 1.73205 - 0.5 * w,
"top": R + 0.5 * r - 0.5 * h
}, {
"left": R - r - 0.5 * w,
"top": R - 0.5 * h
}, {
"left": R - 0.5 * r * 1.73205 - 0.5 * w,
"top": R - 0.5 * r - 0.5 * h
}, {
"left": R - 0.5 * r - 0.5 * w,
"top": R - 0.5 * r * 1.73205 - 0.5 * h
}, {
"left": R - 0.5 * w,
"top": R - r - 0.5 * h
}];
var clock = document.getElementById("clock");
for (var i = 1; i <= 12; i++) {
if (i % 3 == 0) {
clock.innerHTML += "<div class=‘clock-num em_num‘>" + i + "</div>";
} else {
clock.innerHTML += "<div class=‘clock-num‘>" + i + "</div>";
}
}
var clock_num = document.getElementsByClassName("clock-num");
for (var i = 0; i < clock_num.length; i++) {
clock_num[i].style.left = numXY[i].left + ‘px‘;
clock_num[i].style.top = numXY[i].top + ‘px‘;
}
for (var i = 0; i < 60; i++) {
clock.innerHTML += "<div class=‘clock-scale‘> " +
"<div class=‘scale-hidden‘></div>" +
"<div class=‘scale-show‘></div>" +
"</div>";
}
var scale = document.getElementsByClassName("clock-scale");
for (var i = 0; i < scale.length; i++) {
scale[i].style.transform = "rotate(" + (i * 6 - 90) + "deg)";
}
}
})();
Html代碼:
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<link rel=‘stylesheet‘ type="text/css" href="css/頁面時鐘.css" />
<title>時鐘</title>
</head>
<body style="text-align: center;">
<h3>頁面時鐘展示</h3>
<div class="clock" id="clock">
<!-- 原點 -->
<div class="origin"></div>
<!-- 時分秒針 -->
<div class="clock-line hour-line" id="hour-line"></div>
<div class="clock-line minute-line" id="minute-line"></div>
<div class="clock-line second-line" id="second-line"></div>
<!-- 日期 -->
<div class="date-info" id="date-info"></div>
<!-- 時間 -->
<div class="time-info">
<div class="time" id="hour-time"></div>
<div class="time" id="minute-time"></div>
<div class="time" id="second-time"></div>
</div>
</div>
<script type=‘text/javascript‘ src="js/頁面時鐘.js"></script>
</body>
</html>
運行結果:
【總結完畢】
Java學習總計(二十六)——JavaScript正則表達式,Js表單驗證,原生js+css頁面時鐘