Java使用hutool工具实现验证码登录
作者:七禾页话
这篇文章主要为大家详细介绍了Java如何使用hutool工具实现验证码登录功能,文中的示例代码讲解详细,感兴趣的小伙伴可以跟随小编一起学习一下
1.先说一下流程图
2.导入工具包
<dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>5.8.12</version> </dependency>
3.流程梳理
3.1前端模版代码
<template> <form @submit.prevent="handleSubmit"> <div class="input-group"> <div class="captcha-wrapper"> <input v-model="form.captcha" type="text" placeholder="请输入验证码" :class="{ 'shake': formErrors.captcha }" maxlength="4" /> <div class="captcha-container"> <img :src="captchaUrl" @click="refreshCaptcha" class="captcha-img" alt="验证码" @error="handleCaptchaError" /> <button type="button" class="refresh-btn" @click="refreshCaptcha" title="刷新验证码" > </button> </div> </div> <transition name="fade"> <p v-if="formErrors.captcha" class="error-message">{{ formErrors.captcha }}</p> </transition> </template>
3.2逻辑代码
前端挂载组件时发送请求到后端生成验证码
@RestController @RequestMapping("/api") public class AuthController { @GetMapping("/captcha") public void generateCaptcha(HttpServletResponse response, HttpSession session) { // 生成验证码 LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(100, 40); // 将验证码存入session session.setAttribute("captcha", lineCaptcha.getCode()); try { // 输出到客户端 response.setContentType("image/png"); lineCaptcha.write(response.getOutputStream()); } catch (IOException e) { e.printStackTrace(); } }
<img :src="captchaUrl”>动态绑定实现渲染验证码,button绑定的是这个refreshCaptcha事件,所以可以实现刷新验证码的操作
const captchaUrl = ref('') // 组件挂载时加载验证码 onMounted(() => { refreshCaptcha() }) const refreshCaptcha = () => { // 直接使用API地址,添加时间戳防止缓存 captchaUrl.value = `${request.defaults.baseURL}/api/captcha?t=${new Date().getTime()}` // 清空验证码输入 form.captcha = '' }
然后就是前段提交数据到后端做认证
const form = reactive({ email: '', password: '', remember: false, captcha: '' }) export function login(data) { return request({ url: '/api/login', method: 'post', data }) } try { // 发送登录请求 const res = await login({ username: form.email, password: form.password, captcha: form.captcha, remember: form.remember })
后端接收数据进行校验
@PostMapping("/login") public Result login(@RequestBody LoginDTO loginDTO, HttpSession session) { // 获取session中的验证码 String captcha = (String) session.getAttribute("captcha"); // 校验验证码 if (!loginDTO.getCaptcha().equalsIgnoreCase(captcha)) { return Result.error("验证码错误"); } // TODO: 进行登录逻辑处理 return null; }
4.前端所有代码
<template> <div class="login-page"> <div class="login-container"> <!-- Left side with rocket --> <div class="left-side"> <div class="logo-container"> <h1 class="logo">七禾页话</h1> </div> <div class="hero-text"> <h2>欢迎使用<br />学生管理系统</h2> <p>让工作更高效!</p> </div> <!-- Animated rocket --> <div class="rocket-container"> <div class="rocket" :class="{ 'rocket-hover': isRocketHovering }"> <div class="rocket-body"> <div class="rocket-main"></div> <div class="rocket-base"></div> <div class="rocket-side-left"></div> <div class="rocket-side-right"></div> </div> </div> <!-- Animated clouds --> <div class="clouds"> <div v-for="i in 3" :key="i" class="cloud" :class="`cloud-${i}`" :style="`--delay: ${i * 2}s`"> </div> </div> </div> </div> <!-- Right side with form --> <div class="right-side"> <div class="form-container"> <h2>用户登录</h2> <form @submit.prevent="handleSubmit"> <div class="input-group"> <input v-model="form.email" type="email" placeholder="请输入用户名" :class="{ 'shake': formErrors.email }" /> <transition name="fade"> <p v-if="formErrors.email" class="error-message">{{ formErrors.email }}</p> </transition> </div> <div class="input-group"> <input v-model="form.password" type="password" placeholder="请输入密码" :class="{ 'shake': formErrors.password }" /> <transition name="fade"> <p v-if="formErrors.password" class="error-message">{{ formErrors.password }}</p> </transition> </div> <div class="input-group"> <div class="captcha-wrapper"> <input v-model="form.captcha" type="text" placeholder="请输入验证码" :class="{ 'shake': formErrors.captcha }" maxlength="4" /> <div class="captcha-container"> <img :src="captchaUrl" @click="refreshCaptcha" class="captcha-img" alt="验证码" @error="handleCaptchaError" /> <button type="button" class="refresh-btn" @click="refreshCaptcha" title="刷新验证码" > <svg viewBox="0 0 24 24" class="refresh-icon"> <path d="M17.65 6.35A7.958 7.958 0 0012 4c-4.42 0-7.99 3.58-7.99 8s3.57 8 7.99 8c3.73 0 6.84-2.55 7.73-6h-2.08A5.99 5.99 0 0112 18c-3.31 0-6-2.69-6-6s2.69-6 6-6c1.66 0 3.14.69 4.22 1.78L13 11h7V4l-2.35 2.35z" fill="currentColor"/> </svg> </button> </div> </div> <transition name="fade"> <p v-if="formErrors.captcha" class="error-message">{{ formErrors.captcha }}</p> </transition> </div> <div class="remember-me"> <input v-model="form.remember" type="checkbox" id="remember" /> <label for="remember">记住我</label> </div> <button type="submit" :class="{ 'loading': isLoading }" :disabled="isLoading" > <span v-if="!isLoading">登 录</span> <span v-else class="loading-text"> <svg class="spinner" viewBox="0 0 50 50"> <circle class="path" cx="25" cy="25" r="20" fill="none" stroke-width="5"></circle> </svg> 登录中... </span> </button> </form> <div class="auth-links"> <p class="forgot-password"> <a href="#">忘记密码?</a> </p> <p class="register-link"> 还没有账号? <router-link to="/register" class="text-primary">立即注册</router-link> </p> </div> </div> </div> </div> </div> </template> <script setup> import { ref, reactive, onMounted, onUnmounted } from 'vue' import { useRouter } from 'vue-router' import { login, getCaptcha } from '@/api/auth' import request from '@/utils/request' const router = useRouter() const isRocketHovering = ref(true) const isLoading = ref(false) const captchaUrl = ref('') const form = reactive({ email: '', password: '', remember: false, captcha: '' }) const formErrors = reactive({ email: '', password: '', captcha: '' }) // 刷新验证码 const refreshCaptcha = () => { // 直接使用API地址,添加时间戳防止缓存 captchaUrl.value = `${request.defaults.baseURL}/api/captcha?t=${new Date().getTime()}` // 清空验证码输入 form.captcha = '' } // 处理验证码加载错误 const handleCaptchaError = () => { console.error('验证码图片加载失败') // 可以在这里添加重试逻辑或显示错误提示 } // 组件挂载时加载验证码 onMounted(() => { refreshCaptcha() }) const handleSubmit = async () => { // Reset errors formErrors.email = '' formErrors.password = '' formErrors.captcha = '' // Validate if (!form.email) { formErrors.email = '请输入用户名' return } if (!form.password) { formErrors.password = '请输入密码' return } if (!form.captcha) { formErrors.captcha = '请输入验证码' return } // Show loading state isLoading.value = true try { // 发送登录请求 const res = await login({ username: form.email, password: form.password, captcha: form.captcha, remember: form.remember }) // 存储 token localStorage.setItem('token', res.data.token) // 登录成功,跳转到首页 router.push('/dashboard') } catch (error) { // 根据错误类型显示不同的错误信息 if (error.code === 400) { formErrors.captcha = '验证码错误' await refreshCaptcha() } else if (error.code === 401) { formErrors.password = '用户名或密码错误' await refreshCaptcha() } else { console.error('登录失败:', error) formErrors.password = error.message || '登录失败,请稍后重试' await refreshCaptcha() } } finally { // Reset loading state isLoading.value = false } } // Start rocket hover animation setInterval(() => { isRocketHovering.value = !isRocketHovering.value }, 2000) </script>
5.后端代码
package com.qiheyehua.vuespringboot2.controller; import cn.hutool.captcha.CaptchaUtil; import cn.hutool.captcha.LineCaptcha; import com.qiheyehua.vuespringboot2.domain.dto.LoginDTO; import com.qiheyehua.vuespringboot2.utils.Result; import jakarta.servlet.http.HttpServletResponse; import jakarta.servlet.http.HttpSession; import org.springframework.web.bind.annotation.*; import java.io.IOException; /** * @author 七禾页话 * @date 2024/12/16 18:57 **/ @RestController @RequestMapping("/api") public class AuthController { @GetMapping("/captcha") public void generateCaptcha(HttpServletResponse response, HttpSession session) { // 生成验证码 LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(100, 40); // 将验证码存入session session.setAttribute("captcha", lineCaptcha.getCode()); try { // 输出到客户端 response.setContentType("image/png"); lineCaptcha.write(response.getOutputStream()); } catch (IOException e) { e.printStackTrace(); } } @PostMapping("/login") public Result login(@RequestBody LoginDTO loginDTO, HttpSession session) { // 获取session中的验证码 String captcha = (String) session.getAttribute("captcha"); // 校验验证码 if (!loginDTO.getCaptcha().equalsIgnoreCase(captcha)) { return Result.error("验证码错误"); } // TODO: 进行登录逻辑处理 return null; } }
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