javaweb(js)实现登录注册案例(一)

企业开发 2023-12-17 12:11:57 阅读次数: 0

首先编辑jsp的页面代码

<body id="body">
<div id="banner">
</div>
<header>
    <div id="top">
        <div id="logo">
            <a href="" title="ayaya论坛网站-(=￣ω￣=)-">
                <div id="logo_box">
                    <div id="logo_img1"></div>
                    <div id="logo_img2"></div>
                </div>
            </a>
        </div>
    </div>
</header>
<div id="main">
    <div id="login_ui" class="lr">
        <div class="lr_top">
            <div class="lr_text">
                <img src="${pageContext.request.contextPath}/image/logo/top_logo2.png" class="lr_logo">
            </div>
        </div>
        <div id="login_handoff" class="handoff" onclick="loginHandOff()">
            <span class="handoff_text">注册</span>
        </div>
        <div class="lr_box">
            <form id="login_form">
                <input type="text" name="action" value="login" style="display: none">
                <div id="login_input_superBox">
                    <div id="login_input_box1" class="login_input_box">
                        <span id="login_username_text">用户名</span>
                        <input type="text" id="login_username_input" name="userName" autocomplete="off">
                        <span class="login_errors_message"></span>
                    </div>
                    <div id="login_input_box2" class="login_input_box">
                        <span id="login_password_text">密&emsp;码</span>
                        <input type="password" id="login_password_input" name="passWord">
                        <span class="login_errors_message"></span>
                    </div>
                    <label id="login_submit" for="login_submit_input">登录</label>
                </div>
                <input type="button" style="display: none" id="login_submit_input">
            </form>
        </div>
    </div>
    <div id="register_ui" class="lr">
        <div class="lr_top">
            <div class="lr_text">
                <img src="${pageContext.request.contextPath}/image/logo/top_logo2.png" class="lr_logo">
            </div>
        </div>
        <div id="register_handoff" class="handoff" onclick="registerHandOff()">
            <span class="handoff_text">登录</span>
        </div>
        <div class="lr_box">
            <form id="register_form">
                <input type="text" name="action" value="register" style="display: none">
                <div id="register_input_superBox">
                    <div id="register_input_box1" class="register_input_box">
                        <span id="register_username_text">用户名</span>
                        <input type="text" id="register_username_input" name="userName" autocomplete="off">
                        <span class="register_errors_message"></span>
                    </div>
                    <div id="register_input_box2" class="register_input_box">
                        <span id="register_password_text">密&emsp;码</span>
                        <input type="password" id="register_password_input" name="passWord">
                        <span class="register_errors_message"></span>
                    </div>
                    <div id="register_input_box3" class="register_input_box">
                        <span id="register_confirmThePassword_text">确认密码</span>
                        <input type="password" id="register_confirmThePassword_input" name="confirmThePassword">
                        <span class="register_errors_message"></span>
                    </div>
                    <div id="register_input_box4" class="register_input_box">
                        <span id="register_secretProtection_text">密保</span>
                        <input type="text" id="register_secretProtection_input" name="encrypted">
                        <span class="register_errors_message"></span>
                    </div>
                    <label id="register_submit" for="register_submit_input">注册</label>
                </div>
                <input type="button" style="display: none" id="register_submit_input">
            </form>
            <form id="code">
                <input type="text" name="action" value="registerCode" style="display: none">
                <input id="code_input" type="text" name="registerCode">
            </form>
        </div>
    </div>
</div>
</body>

然后给页面添加css样式

* {
    margin: 0;
    padding: 0;
    list-style-type: none;
    text-decoration:none;
}

body {
    font-family: "STHeiti Light [STXihei]";
    scroll-behavior: smooth;
}

/*弹窗*/
.popup {
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, .5);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    right: 0;
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.popup_box {
    width: 400px;
    height: 250px;
    background: white;
    border-radius: 4px;
}

.popup_title {
    width: 100%;
    height: 65px;
    line-height: 65px;
    background: #000000;
    text-align: center;
    font-size: 32px;
    color: white;
    border-radius: 4px;
    user-select: none;
}

.popup_text {
    width: 100%;
    height: 32px;
    line-height: 16px;
    margin: 52px 0;
    text-align: center;
    font-size: 16px;
    user-select: none;
}

.popup_input {
    width: 76px;
    height: 36px;
    line-height: 36px;
    background: #00a0e9;
    margin: 0 12px;
    text-align: center;
    float: left;
    border: 1px solid #00a0e9;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s;
}

.popup_input:hover {
    background: #000000;
    border: 1px solid #00a0e9;
}

.popup_Input_box{
    width: 100px;
    height: 30px;
    position: relative;
    float: left;
    top: -50px;
    left: 38%;
    margin-left: -2px;
    padding: 0 24px;
    font-size: 14px;
}

.popup_Input_box:focus{
    outline: none;
}

#code{
    display: none;
}

#Prompt_pop_up_box1{
    width: 200px;
    height: 70px;
    background: white;
    position: relative;
    top: -70px;
    opacity: 0;
    overflow: hidden;
    margin: 0 auto;
    border-radius: 5px;
    z-index: 200;
    transition: all 0.3s;
}

#Prompt_pop_up_box1_img_box{
    width: fit-content;
    height: fit-content;
    margin: 8px auto;
}

#Prompt_pop_up_box1_img{
    width: 25px;
    height: 25px;
    user-select: none;
}

#Prompt_pop_up_box1_text{
    width: fit-content;
    height: fit-content;
    margin: 0 auto;
    user-select: none;
    font-size: 12px;
}

#banner {
    width: 100%;
    height: 100%;
    background: url("../image/main-banner.jpg") no-repeat;
    background-size: cover;
    position: fixed;
    top: 0;
}

#banner{
    width: 100%;
    height: 100%;
    background: url("../image/main-banner.jpg") no-repeat;
    background-size: cover;
    position: fixed;
    top: 0;
}

header {
    height: 80px;
}

#top {
    width: 1719px;
    min-width: 1138px;
    height: 80px;
    background: rgba(33, 33, 33);
    position: fixed;
    z-index: 100;
}

#logo {
    width: 300px;
    height: 80px;
    line-height: 80px;
    position: absolute;
    text-align: center;
    color: white;
    font-size: 30px;
    user-select: none;
}

#logo_img1{
    background: url("../image/logo/top_logo1.png") no-repeat;
    background-size: 74px;
    width: 64px;
    height: 100%;
    position: absolute;
}

#logo_box{
    width: 138px;
    height: 100%;
    position: absolute;
    left: 50%;
    margin-left: -69px;
    cursor: pointer;
}

#logo_img2{
    background: url("../image/logo/top_logo2.png") 0 28px no-repeat;
    background-size: 74px;
    width: 74px;
    height: 100%;
    position: absolute;
    right: 0;
}

#main{
    width: 700px;
    height: 450px;
    position: absolute;
    /*top: 50%;*/
    margin-top: 160px;
    left: 50%;
    margin-left: -350px;
    overflow: hidden;
}

.lr{
    width: 100%;
    height: 100%;
}

.lr_logo{
    width: 16%;
    height: 50%;
    /*object-fit: cover;*/
    margin: 20px 0 ;
}

#login_ui{
    background: white;
    position: absolute;
}

#register_ui{
    background: white;
    position: absolute;
}

.handoff{
    width: 70px;
    height: 70px;
    position: absolute;
    top: 0;
    left: 0;
    background: #00a0e9;
    border-bottom-right-radius: 100px;
    overflow: hidden;
    transition: all 0.3s;
}

.handoff:hover{
    border-bottom-right-radius: 100px;
    cursor: pointer;
    background: #3bc3f8;
    box-shadow: #3bc3f8 0 0 15px 0;
}

.lr_top{
    width: 100%;
    height: 70px;
    background: rgb(33, 33, 33);
}

.lr_text{
    color: white;
    font-size: 40px;
    text-align: center;
    line-height: 70px;
    margin: 0 auto;
    user-select: none;
}

.handoff_text{
    color: white;
    position: relative;
    left: 8px;
    top: 12px;
    font-size: 22px;
    user-select: none;
}

.lr_box{
    width: 100%;
    height: 380px;
    position: absolute;
    bottom: 0;
    user-select: none;
}

#login_input_superBox{
    width: 352px;
    height: 44px;
    position: absolute;
    left: 50%;
    margin-left: -176px;
    top: 60px;
}

.login_input_box{
    width: 350px;
    height: 40px;
    border: 1px solid rgba(161, 161, 161, 0.67);
    line-height: 40px;
    text-align: center;
}

#login_input_box2{
    border-top-color: rgba(255, 255, 255, 0);
    position: relative;
    top: -1px;
    border-bottom-right-radius: 5px;
    border-bottom-left-radius: 5px;
}

#login_input_box1{
    border-top-right-radius: 5px;
    border-top-left-radius: 5px;
}

#login_username_text{
    position: absolute;
    left: 20px;
}

#login_password_text{
    position: absolute;
    left: 20px;
}

#login_username_input{
    height: 28px;
    width: 175px;
    position: absolute;
    top: 8px;
    left: 90px;
    border: none;
    outline: none;
    font-size: 16px;
}

#login_password_input{
    height: 28px;
    width: 175px;
    position: absolute;
    top: 8px;
    left: 90px;
    border: none;
    outline: none;
    font-size: 16px;
}

#login_submit{
    width: 140px;
    height: 50px;
    border-radius: 10px;
    background: #00a0e9;
    text-align: center;
    line-height: 50px;
    color: white;
    font-size: 20px;
    position: absolute;
    left: 50%;
    margin-left: -70px;
    top: 140px;
}

#login_submit:hover{
    background: #1db0ee;
    user-select: none;
    cursor: pointer;
}

.login_errors_message{
    width: 84px;
    height: 40px;
    color: red;
    position: absolute;
    right: 2px;
    font-size: 12px;
    line-height: 20px;
    user-select: none;
}

/*
    注册表单
*/
#register_input_superBox{
    width: 352px;
    height: 44px;
    position: absolute;
    left: 50%;
    margin-left: -176px;
    top: 60px;
}

.register_input_box{
    width: 350px;
    height: 40px;
    border: 1px solid rgba(161, 161, 161, 0.67);
    line-height: 40px;
    text-align: center;
}

#register_input_box4{
    border-top-color: rgba(255, 255, 255, 0);
    position: relative;
    top: -1px;
    border-bottom-right-radius: 5px;
    border-bottom-left-radius: 5px;
}

#register_input_box3{
    border-top-color: rgba(255, 255, 255, 0);
    position: relative;
    top: -1px;
}

#register_input_box2{
    border-top-color: rgba(255, 255, 255, 0);
    position: relative;
    top: -1px;
}

#register_input_box1{
    border-top-right-radius: 5px;
    border-top-left-radius: 5px;
}

#register_username_text{
    position: absolute;
    left: 20px;
}

#register_password_text{
    position: absolute;
    left: 20px;
}

#register_confirmThePassword_text{
    position: absolute;
    left: 15px;
}

#register_secretProtection_text{
    position: absolute;
    left: 20px;
}

#register_username_input{
    height: 28px;
    width: 175px;
    position: absolute;
    top: 8px;
    left: 90px;
    border: none;
    outline: none;
    font-size: 16px;
}

#register_password_input{
    height: 28px;
    width: 175px;
    position: absolute;
    top: 8px;
    left: 90px;
    border: none;
    outline: none;
    font-size: 16px;
}

#register_confirmThePassword_input{
    height: 28px;
    width: 175px;
    position: absolute;
    top: 8px;
    left: 90px;
    border: none;
    outline: none;
    font-size: 16px;
}

#register_secretProtection_input{
    height: 28px;
    width: 175px;
    position: absolute;
    top: 8px;
    left: 90px;
    border: none;
    outline: none;
    font-size: 16px;
}

#register_submit{
    width: 140px;
    height: 50px;
    border-radius: 10px;
    background: #00a0e9;
    text-align: center;
    line-height: 50px;
    color: white;
    font-size: 20px;
    position: absolute;
    left: 50%;
    margin-left: -70px;
    top: 190px;
}

#register_submit:hover{
    background: #1db0ee;
    user-select: none;
    cursor: pointer;
}

.register_errors_message{
    width: 84px;
    height: 40px;
    color: red;
    position: absolute;
    right: 2px;
    font-size: 12px;
    line-height: 19px;
    user-select: none;
}

看一下页面预览图

 

 在样式编辑完成后就可以着手写js代码了

我们先来实现登录注册切换的功能

在左上角的蓝色按钮添加点击事件

 在方法里面写上

//隐藏登录框
function loginHandOff() {
    loginDiv.style.display = "none";
    registerDiv.style.display = "block";
    document.getElementById("login_username_input").value = '';
    document.getElementById("login_password_input").value = '';
    let loginErrorsMessage = document.getElementsByClassName("login_errors_message");
    loginErrorsMessage[0].innerHTML = "";
    loginErrorsMessage[1].innerHTML = "";
}

//隐藏注册框
function registerHandOff() {
    loginDiv.style.display = "block";
    registerDiv.style.display = "none";
    document.getElementById("register_username_input").value = '';
    document.getElementById("register_password_input").value = '';
    document.getElementById("register_confirmThePassword_input").value = '';
    document.getElementById("register_secretProtection_input").value = '';
    let registerErrorsMessage = document.getElementsByClassName("register_errors_message");
    registerErrorsMessage[0].innerHTML = "";
    registerErrorsMessage[1].innerHTML = "";
    registerErrorsMessage[2].innerHTML = "";
    registerErrorsMessage[3].innerHTML = "";
}

 这个地方的思维是当点击后调用对应的方法,然后使登录容器消失(display:none),让注册容器显示(display:block),或者反之

需要注意的是,在切换另一个窗口时,需要将输入框里的value值和报错提示框的值清空,实现刷新的效果.

之后是要对输入框里的值做一个实时验证,提高使用的舒适度

效果如下

 这里实现的方法是给每个输入框添加"change"事件,相对于blur事件change事件是在对象值发生变化时触发,而blur事件是对象失去焦点时触发,避免了点击输入框后不输入内容报出错误信息.

//注册输入框验证提示信息
    registerUserNameInput.addEventListener("change",function (){
        userNameVali(this,"register_errors_message","register");
    })
    registerPasswordInput.addEventListener("change",function (){
        passWordVali(this,"register_errors_message","register");
    })
    registerConfirmThePasswordInput.addEventListener("change",function (){
        confirmThePasswordVali(this,registerPasswordInput);
    })
    registerSecretProtectionInput.addEventListener("change",function (){
        encryptedVali(this);
    })

 change事件里执行js验证方法

//用户名验证
function userNameVali(Object,textFor,type){
    let reg = /^[a-zA-Z0-9]{6,20}$/;
    let userNameText = document.getElementsByClassName(textFor)[0];
    let userNameValue = Object.value;
    if (type === "login"){
        if (userNameValue == null || userNameValue === ""){
            userNameText.innerHTML = "用户名不能为空";
            loginUserNmeFlag = false;
        }else if (!(reg.test(userNameValue))){
            userNameText.innerHTML = "长度为6-20,只能包含数字字母";
            loginUserNmeFlag = false;
        }else {
            userNameText.innerHTML = "";
            loginUserNmeFlag = true;
        }
    }else {
        if (userNameValue == null || userNameValue === ""){
            userNameText.innerHTML = "用户名不能为空";
            userNmeFlag = false;
        }else if (!(reg.test(userNameValue))){
            userNameText.innerHTML = "长度为6-20,只能包含数字字母";
            userNmeFlag = false;
        }else {
            userNameText.innerHTML = "";
            userNmeFlag = true;
        }
    }
}
//密码验证
function passWordVali(Object,textFor,type){
    let reg = /^(?=.*[0-9])(?=.*[a-zA-Z])(.{8,20})$/;
    let passWordText = document.getElementsByClassName(textFor)[1];
    let passWordValue = Object.value;
    if (type === "login"){
        if (passWordValue == null || passWordValue === ""){
            passWordText.innerHTML = "密码不能为空";
            loginPassWordFlag = false;
        }else if (!(reg.test(passWordValue))){
            passWordText.innerHTML = "长度为8-20,须包含数字和字母";
            loginPassWordFlag = false;
        }else {
            passWordText.innerHTML = "";
            loginPassWordFlag = true;
        }
    }else {
        if (passWordValue == null || passWordValue === ""){
            passWordText.innerHTML = "密码不能为空";
            passWordFlag = false;
        }else if (!(reg.test(passWordValue))){
            passWordText.innerHTML = "长度为8-20,须包含数字和字母";
            passWordFlag = false;
        }else {
            passWordText.innerHTML = "";
            passWordFlag = true;
        }
    }

}
//确认密码验证
function confirmThePasswordVali(Object,passWord){
    let confirmThePasswordText = document.getElementsByClassName("register_errors_message")[2];
    let confirmThePasswordValue = Object.value;
    let passWordValue = passWord.value;
    if (confirmThePasswordValue == null || confirmThePasswordValue === ""){
        confirmThePasswordText.innerHTML = "确认密码不能为空";
        confirmThePasswordFlag = false;
    }else if (confirmThePasswordValue !== passWordValue){
        confirmThePasswordText.innerHTML = "两次密码不一致";
        confirmThePasswordFlag = false;
    }else {
        confirmThePasswordText.innerHTML = "";
        confirmThePasswordFlag = true;
    }
}
//密保验证
function encryptedVali(Object){
    let reg = /^\d{6,8}$/;
    let encryptedText = document.getElementsByClassName("register_errors_message")[3];
    let encryptedValue = Object.value;
    if (encryptedValue == null || encryptedValue === ""){
        encryptedText.innerHTML = "密保不能为空";
        encryptedFlag = false;
    }else if (!(reg.test(encryptedValue))){
        encryptedText.innerHTML = "密保只能为6-8位的   纯数字";
        encryptedFlag = false;
    }else {
        encryptedText.innerHTML = "";
        encryptedFlag = true;
    }
}

首先要进行非空验证(包括空字符串,避免用户输入全空格),然后使用正则验证数据的规范,有未通过的一项则在外面的标识符返回false,如果都通过了就返回true

userNmeFlag = false;
    passWordFlag = false;
    confirmThePasswordFlag = false;
    encryptedFlag = false;

注意标识符要是全局变量,方便获取

这次就先讲到这里,后面会出第二章,有需要讨论的话请在评论区留言,我们下期再见!

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