Java结合uniapp实现验证码功能的示例详解
更新时间：2024年07月25日 08:47:29 作者：码农研究僧
UniApp 是一个基于 Vue.js 的跨平台应用开发框架,允许开发者使用统一的代码库来构建多平台应用,这篇文章将给大家介绍Java结合uniapp实现验证码功能,文中通过详细的代码示例讲解的非常详细,需要的朋友可以参考下
本次的Demo主要以图片验证码的方式输入和接收
初始界面如下：
改造之后的界面如下：
1. Java
引入验证码
<!-- 验证码 -->
<dependency>
<groupId>com.github.whvcse</groupId>
<artifactId>easy-captcha</artifactId>
</dependency>
设置验证码的key以及image
下方的redisTemplate 为RedisTemplate<String, Object> redisTemplate
@GetMapping("/oauth/captcha")
public Kv captcha() {
SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 5);
String verCode = specCaptcha.text().toLowerCase();
String key = StringUtil.randomUUID();
// 存入redis并设置过期时间为30分钟
redisTemplate.opsForValue().setEx(CacheNames.CAPTCHA_KEY + key, verCode, Duration.ofMinutes(30));
// 将key和base64返回给前端
return Kv.create().set("key", key).set("image", specCaptcha.toBase64());
}
其中Kv为我的工具类，对应的create()其实是new一个对象而已
2. uniapp
验证码处理:
refreshCode 方法用于获取新的验证码图片，并更新 captchaImg
点击验证码图片会触发 refreshCode 方法，用户可以获取新的验证码以便重新输入
登录逻辑:
在 login 方法中，首先检查用户名、密码和验证码是否为空。如果为空，则通过 uni.$u.toast 提示用户
将密码使用 MD5 加密后，与用户名和其他参数一起发送到服务器进行登录验证
登录成功后，使用 uni.$store.commit 保存 token，并存储当前时间到本地存储中，然后跳转到主页面
响应式布局:
根据屏幕的宽高比例调整登录框的位置和宽度，确保在不同设备上都有良好的显示效果
错误处理:
使用 uni.$u.toast 提示用户登录失败的原因，以便可以进行必要的调整
其中的图片还有路径等细节 ，可放置个人的东西
对应的小程序界面如下：
<template> <view style="width: 100%; height: 100vh;"> <image src="../../static/cloud.jpg" :style="topstyle" class="app_content_top"></image> <view class="login_box" :style="loginBoxClass"> <view style="text-align: center; margin-top: 3%; margin-bottom: 2%;"> <image src="../../static/logo.png" class="logo"></image> </view> <view class="title"><text>码农研究僧的小程序</text></view> <view style="width: 90%; margin-left: 5%;"> <view class="equipment_input"> <u--input clearable v-model="username" placeholder="请输入账号" prefixIcon="account" prefixIconStyle="font-size: 22px; color: #909399" ></u--input> </view> <view class="equipment_input"> <u--input clearable v-model="password" placeholder="请输入密码" prefixIcon="lock" password prefixIconStyle="font-size: 22px; color: #909399" ></u--input> </view> <view class="equipment_input"> <u--input clearable v-model="captcha" placeholder="请输入验证码" prefixIcon="account" prefixIconStyle="font-size: 22px; color: #909399" ></u--input> <image :src="captchaImg" @click="refreshCode" class="captcha"></image> </view> </view> <view style="text-align: center; margin-top: 5%;"> <u-button style="width: 90%; margin-left: 5%; margin-bottom: 5%;" type="primary" :plain="true" :hairline="true" text="细边" @click="login">登录</u-button> </view> </view> <view style="text-align: center; margin-top: 70%;"> <text>Copyright 2024 - 码农研究僧.</text> </view> </view> </template>
js方法如下：
<script>
import w_md5 from "../../js_sdk/zww-md5/w_md5.js";
import { getCaptcha } from "../../api/auth.js";
export default {
data() {
return {
captchaImg: 'data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7',
captcha: '',
username: '',
password: '',
topstyle: {
height: 0,
},
loginBoxClass: {},
};
},
created() {
this.refreshCode();
},
mounted() {
this.topstyle.height = uni.getSystemInfoSync().screenHeight + 'px';
if (uni.getSystemInfoSync().screenWidth > uni.getSystemInfoSync().screenHeight) {
this.loginBoxClass = {
'margin-top': '5%',
'width': '60%',
'margin-left': '20%',
};
}
},
methods: {
refreshCode() {
getCaptcha().then(res => {
this.captchaImg = res.data.image;
});
},
login() {
if (!this.username) {
uni.$u.toast('请输入账号!');
return;
}
if (!this.password) {
uni.$u.toast('请输入密码!');
return;
}
if (!this.captcha) {
uni.$u.toast('请输入验证码!');
return;
}
const password = w_md5.hex_md5_32(this.password);
uni.$u.http.post('/manong/oauth/token', {
grant_type: 'password',
username: this.username,
password: password,
scope: 'all',
tenantId: '000000'
}, {
header: {
'Content-Type': 'application/x-www-form-urlencoded',
'Tenant-Id': '000000'
}
}).then(res => {
const data = res.data;
uni.$store.commit('updateToken', data);
uni.setStorageSync('tokenDateTime', new Date().getTime());
uni.$u.toast('登录成功!');
uni.switchTab({
url: "../index/index",
});
}).catch(err => {
uni.$u.toast('登录失败，请重试!');
});
}
}
};
</script>
布局如下：
<style lang="scss" scoped>
.app_content_top {
z-index: -1;
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100vh;
}
.login_box {
border-radius: 2%;
box-shadow: -4px 5px 10px rgba(0, 0, 0, 0.5);
background-color: $uni-bg-color;
width: 90%;
margin-top: 30%;
margin-left: 5%;
}
.title {
font-size: $uni-img-size-base;
text-align: center;
margin-top: 2%;
margin-bottom: 2%;
}
.equipment_input {
margin-top: 1%;
margin-bottom: 1%;
border-bottom: 1px solid #d1d1d1;
}
.logo {
left: 50%;
transform: translateX(-50%);
width: 200rpx;
height: 200rpx;
border-radius: 50%;
background-color: #eeeeee;
}
.captcha {
height: 150rpx;
}
</style>
补充两个引入的js文件
获取后端验证码的js文件：
const http = uni.$u.http
export const getCaptcha = () => http.get('/manong/oauth/captcha')
md5加密
let w_md5 = {}
function hex_md5(string,bit) {
function md5_RotateLeft(lValue, iShiftBits) {
return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
}
function md5_AddUnsigned(lX, lY) {
var lX4, lY4, lX8, lY8, lResult;
lX8 = (lX & 0x80000000);
lY8 = (lY & 0x80000000);
lX4 = (lX & 0x40000000);
lY4 = (lY & 0x40000000);
lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
if (lX4 & lY4) {
return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
}
if (lX4 | lY4) {
if (lResult & 0x40000000) {
return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
} else {
return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
}
} else {
return (lResult ^ lX8 ^ lY8);
}
}
function md5_F(x, y, z) {
return (x & y) | ((~x) & z);
}
function md5_G(x, y, z) {
return (x & z) | (y & (~z));
}
function md5_H(x, y, z) {
return (x ^ y ^ z);
}
function md5_I(x, y, z) {
return (y ^ (x | (~z)));
}
function md5_FF(a, b, c, d, x, s, ac) {
a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_F(b, c, d), x), ac));
return md5_AddUnsigned(md5_RotateLeft(a, s), b);
};
function md5_GG(a, b, c, d, x, s, ac) {
a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_G(b, c, d), x), ac));
return md5_AddUnsigned(md5_RotateLeft(a, s), b);
};
function md5_HH(a, b, c, d, x, s, ac) {
a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_H(b, c, d), x), ac));
return md5_AddUnsigned(md5_RotateLeft(a, s), b);
};
function md5_II(a, b, c, d, x, s, ac) {
a = md5_AddUnsigned(a, md5_AddUnsigned(md5_AddUnsigned(md5_I(b, c, d), x), ac));
return md5_AddUnsigned(md5_RotateLeft(a, s), b);
};
function md5_ConvertToWordArray(string) {
var lWordCount;
var lMessageLength = string.length;
var lNumberOfWords_temp1 = lMessageLength + 8;
var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64;
var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
var lWordArray = Array(lNumberOfWords - 1);
var lBytePosition = 0;
var lByteCount = 0;
while (lByteCount < lMessageLength) {
lWordCount = (lByteCount - (lByteCount % 4)) / 4;
lBytePosition = (lByteCount % 4) * 8;
lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
lByteCount++;
}
lWordCount = (lByteCount - (lByteCount % 4)) / 4;
lBytePosition = (lByteCount % 4) * 8;
lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
return lWordArray;
};
function md5_WordToHex(lValue) {
var WordToHexValue = "", WordToHexValue_temp = "", lByte, lCount;
for (lCount = 0; lCount <= 3; lCount++) {
lByte = (lValue >>> (lCount * 8)) & 255;
WordToHexValue_temp = "0" + lByte.toString(16);
WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2);
}
return WordToHexValue;
};
function md5_Utf8Encode(string) {
string = string.replace(/\r\n/g, "\n");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
} else if ((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
} else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
};
var x = Array();
var k, AA, BB, CC, DD, a, b, c, d;
var S11 = 7, S12 = 12, S13 = 17, S14 = 22;
var S21 = 5, S22 = 9, S23 = 14, S24 = 20;
var S31 = 4, S32 = 11, S33 = 16, S34 = 23;
var S41 = 6, S42 = 10, S43 = 15, S44 = 21;
string = md5_Utf8Encode(string);
x = md5_ConvertToWordArray(string);
a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;
for (k = 0; k < x.length; k += 16) {
AA = a; BB = b; CC = c; DD = d;
a = md5_FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
d = md5_FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
c = md5_FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
b = md5_FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
a = md5_FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
d = md5_FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
c = md5_FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
b = md5_FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
a = md5_FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
d = md5_FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
c = md5_FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
b = md5_FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
a = md5_FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
d = md5_FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
c = md5_FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
b = md5_FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
a = md5_GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
d = md5_GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
c = md5_GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
b = md5_GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
a = md5_GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
d = md5_GG(d, a, b, c, x[k + 10], S22, 0x2441453);
c = md5_GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
b = md5_GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
a = md5_GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
d = md5_GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
c = md5_GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
b = md5_GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
a = md5_GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
d = md5_GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
c = md5_GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
b = md5_GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
a = md5_HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
d = md5_HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
c = md5_HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
b = md5_HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
a = md5_HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
d = md5_HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
c = md5_HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
b = md5_HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
a = md5_HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
d = md5_HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
c = md5_HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
b = md5_HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
a = md5_HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
d = md5_HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
c = md5_HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
b = md5_HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
a = md5_II(a, b, c, d, x[k + 0], S41, 0xF4292244);
d = md5_II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
c = md5_II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
b = md5_II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
a = md5_II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
d = md5_II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
c = md5_II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
b = md5_II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
a = md5_II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
d = md5_II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
c = md5_II(c, d, a, b, x[k + 6], S43, 0xA3014314);
b = md5_II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
a = md5_II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
d = md5_II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
c = md5_II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
b = md5_II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
a = md5_AddUnsigned(a, AA);
b = md5_AddUnsigned(b, BB);
c = md5_AddUnsigned(c, CC);
d = md5_AddUnsigned(d, DD);
}
if(bit==32){
return (md5_WordToHex(a) + md5_WordToHex(b) + md5_WordToHex(c) + md5_WordToHex(d)).toLowerCase();
}
return (md5_WordToHex(b) + md5_WordToHex(c)).toLowerCase();
}
//16位小写
w_md5.hex_md5_16 = function (string) {
return hex_md5(string,16);
}
//16位大写
w_md5.hex_md5_16Upper = function (string) {
return hex_md5(string,16).toUpperCase();
}
//32位小写
w_md5.hex_md5_32 = function (string) {
return hex_md5(string,32);
}
//32位大写
w_md5.hex_md5_32Upper = function (string) {
return hex_md5(string,32).toUpperCase();
}
export default w_md5
到此这篇关于Java结合uniapp实现验证码功能的示例详解的文章就介绍到这了,更多相关Java uniapp验证码内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！
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