基于Vue和Element UI实现前后端分离和交互

前言

一、Element UI简介

1.Element UI是什么

2.Element UI的特点

二、项目搭建

1.创建一个SPA项目

2.安装 Element-UI

3.导入组件

4.创建登陆注册界面

注册组件---Register.vue

定义组件与路由的对应关系

效果演示：

三、前后端数据交互

1.安装axios

2.导入api模块，添加axios的全局配置

3.修改main.js配置vue-axios

4.数据表数据

5.编写后端登录注册controller层

6.使用封装后的axios发送请求

7.测试

四、CORS跨域

1.什么是CORS？

2.为什么会出现CORS问题？

3.特点

4.如何解决CORS问题？

5.跨域问题处理

前言

当今的Web开发趋势中，前后端分离已经成为一种流行的架构模式。它将前端和后端的开发分离开来，使得前端和后端可以独立进行开发和部署。Vue.js作为一种流行的前端框架，结合Element UI这个优秀的UI组件库，可以帮助我们更好地实现前后端分离和交互。

一、Element UI简介

1.Element UI是什么

Element UI是一套基于Vue.js的开源UI组件库。它提供了丰富的可复用的UI组件，包括按钮、表单、弹窗、菜单等，可以帮助开发者快速构建现代化的Web应用程序界面。Element UI具有简洁美观的设计风格，易于使用和定制。它还提供了丰富的文档和示例，方便开发者学习和使用。无论是初学者还是有经验的开发者，都可以通过Element UI来提高开发效率，创建出优秀的用户界面。

2.Element UI的特点

1. 响应式布局：Element UI的组件可以根据不同的屏幕尺寸自动调整布局，适应不同的设备。

2. 高度可定制：开发者可以根据自己的需求对组件进行定制，包括样式、功能和交互等方面。

3. 丰富的文档和示例：Element UI提供了详细的文档和示例，方便开发者学习和使用。

4. 国际化支持：Element UI支持多种语言，可以轻松实现国际化的Web应用程序。

二、项目搭建

1.创建一个SPA项目

可观看下面这篇博文

Vue安装并使用Vue-CLI构建SPA项目并实现路由https://blog.csdn.net/weixin_74268571/article/details/133137962?spm=1001.2014.3001.5502

创建好之后运行项目

在SAP项目的根目录输入cmd后在cmd窗口输入npm run dev

2.安装 Element-UI

在安装前需先关停我们的项目，在cmd窗口中ctrl+c,ctrl+c就可以了

接下来就可以通过命令去下载Element UI

cd my-spa                                 #进入新建项目的根目录
npm install element-ui -S                 #安装 Element UI模块

需进入该SPA项目根目录安装Element UI模块

下载后就可以看到该依赖了

注：

在Vue中，使用命令行工具（如npm或yarn）下载依赖时，可以使用不同的选项来指定依赖的安装方式：

-g：全局安装。使用该选项下载的依赖将被安装在全局环境中，可以在任何项目中使用。通常用于安装一些全局的工具或命令行工具，比如Vue CLI。

总结起来，-g用于全局安装工具或命令行工具，-s用于保存项目运行所必需的依赖，-d用于保存开发过程中需要的依赖。

3.导入组件

在main.js中导入Element UI对应组件并将Element UI挂载在Vue中

// The Vue build version to load with the `import` command
// (runtime-only or standalone) has been set in webpack.base.conf with an alias.
import Vue from 'vue'
// 新添加1
import ElementUI from 'element-ui'
// 新添加2，避免后期打包样式不同，要放在import App from './App';之前
import 'element-ui/lib/theme-chalk/index.css'
import App from './App'
import router from './router'// 新添加3
Vue.use(ElementUI)
Vue.config.productionTip = false/* eslint-disable no-new */
new Vue({el: '#app',router,components: { App },template: '<App/>'
})

4.创建登陆注册界面

登录组件---Login.vue

<template><div class="login-wrap"><el-form class="login-container"><h1 class="title">用户登录</h1><el-form-item label=""><el-input type="text" v-model="username" placeholder="登录账号" autocomplete="off"></el-input></el-form-item><el-form-item label=""><el-input type="password" v-model="password" placeholder="登录密码" autocomplete="off"></el-input></el-form-item><el-form-item><el-button type="primary" style="width:100%;" @click="doSubmit()">提交</el-button></el-form-item><el-row style="text-align: center;margin-top:-10px"><el-link type="primary">忘记密码</el-link><el-link type="primary" @click="gotoRegister()">用户注册</el-link></el-row></el-form></div>
</template>
<script>
export default {name: 'Login',data () {return {username : '',password:''}},methods:{gotoRegister(){//跳转this.$router.push('/Register');}}
}
</script><style scoped>.login-wrap {box-sizing: border-box;width: 100%;height: 100%;padding-top: 10%;background-image: url(data:image/svg+xml;base64,<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg width="1361px" height="609px" viewBox="0 0 1361 609" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <!-- Generator: Sketch 46.2 (44496) - http://www.bohemiancoding.com/sketch -->
    <title>Group 21</title>
    <desc>Created with Sketch.</desc>
    <defs></defs>
    <g id="Ant-Design-Pro-3.0" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <g id="账户密码登录-校验" transform="translate(-79.000000, -82.000000)">
            <g id="Group-21" transform="translate(77.000000, 73.000000)">
                <g id="Group-18" opacity="0.8" transform="translate(74.901416, 569.699158) rotate(-7.000000) translate(-74.901416, -569.699158) translate(4.901416, 525.199158)">
                    <ellipse id="Oval-11" fill="#CFDAE6" opacity="0.25" cx="63.5748792" cy="32.468367" rx="21.7830479" ry="21.766008"></ellipse>
                    <ellipse id="Oval-3" fill="#CFDAE6" opacity="0.599999964" cx="5.98746479" cy="13.8668601" rx="5.2173913" ry="5.21330997"></ellipse>
                    <path d="M38.1354514,88.3520215 C43.8984227,88.3520215 48.570234,83.6838647 48.570234,77.9254015 C48.570234,72.1669383 43.8984227,67.4987816 38.1354514,67.4987816 C32.3724801,67.4987816 27.7006688,72.1669383 27.7006688,77.9254015 C27.7006688,83.6838647 32.3724801,88.3520215 38.1354514,88.3520215 Z" id="Oval-3-Copy" fill="#CFDAE6" opacity="0.45"></path>
                    <path d="M64.2775582,33.1704963 L119.185836,16.5654915" id="Path-12" stroke="#CFDAE6" stroke-width="1.73913043" stroke-linecap="round" stroke-linejoin="round"></path>
                    <path d="M42.1431708,26.5002681 L7.71190162,14.5640702" id="Path-16" stroke="#E0B4B7" stroke-width="0.702678964" opacity="0.7" stroke-linecap="round" stroke-linejoin="round" stroke-dasharray="1.405357899873153,2.108036953469981"></path>
                    <path d="M63.9262187,33.521561 L43.6721326,69.3250951" id="Path-15" stroke="#BACAD9" stroke-width="0.702678964" stroke-linecap="round" stroke-linejoin="round" stroke-dasharray="1.405357899873153,2.108036953469981"></path>
                    <g id="Group-17" transform="translate(126.850922, 13.543654) rotate(30.000000) translate(-126.850922, -13.543654) translate(117.285705, 4.381889)" fill="#CFDAE6">
                        <ellipse id="Oval-4" opacity="0.45" cx="9.13482653" cy="9.12768076" rx="9.13482653" ry="9.12768076"></ellipse>
                        <path d="M18.2696531,18.2553615 C18.2696531,13.2142826 14.1798519,9.12768076 9.13482653,9.12768076 C4.08980114,9.12768076 0,13.2142826 0,18.2553615 L18.2696531,18.2553615 Z" id="Oval-4" transform="translate(9.134827, 13.691521) scale(-1, -1) translate(-9.134827, -13.691521) "></path>
                    </g>
                </g>
                <g id="Group-14" transform="translate(216.294700, 123.725600) rotate(-5.000000) translate(-216.294700, -123.725600) translate(106.294700, 35.225600)">
                    <ellipse id="Oval-2" fill="#CFDAE6" opacity="0.25" cx="29.1176471" cy="29.1402439" rx="29.1176471" ry="29.1402439"></ellipse>
                    <ellipse id="Oval-2" fill="#CFDAE6" opacity="0.3" cx="29.1176471" cy="29.1402439" rx="21.5686275" ry="21.5853659"></ellipse>
                    <ellipse id="Oval-2-Copy" stroke="#CFDAE6" opacity="0.4" cx="179.019608" cy="138.146341" rx="23.7254902" ry="23.7439024"></ellipse>
                    <ellipse id="Oval-2" fill="#BACAD9" opacity="0.5" cx="29.1176471" cy="29.1402439" rx="10.7843137" ry="10.7926829"></ellipse>
                    <path d="M29.1176471,39.9329268 L29.1176471,18.347561 C23.1616351,18.347561 18.3333333,23.1796097 18.3333333,29.1402439 C18.3333333,35.1008781 23.1616351,39.9329268 29.1176471,39.9329268 Z" id="Oval-2" fill="#BACAD9"></path>
                    <g id="Group-9" opacity="0.45" transform="translate(172.000000, 131.000000)" fill="#E6A1A6">
                        <ellipse id="Oval-2-Copy-2" cx="7.01960784" cy="7.14634146" rx="6.47058824" ry="6.47560976"></ellipse>
                        <path d="M0.549019608,13.6219512 C4.12262681,13.6219512 7.01960784,10.722722 7.01960784,7.14634146 C7.01960784,3.56996095 4.12262681,0.670731707 0.549019608,0.670731707 L0.549019608,13.6219512 Z" id="Oval-2-Copy-2" transform="translate(3.784314, 7.146341) scale(-1, 1) translate(-3.784314, -7.146341) "></path>
                    </g>
                    <ellipse id="Oval-10" fill="#CFDAE6" cx="218.382353" cy="138.685976" rx="1.61764706" ry="1.61890244"></ellipse>
                    <ellipse id="Oval-10-Copy-2" fill="#E0B4B7" opacity="0.35" cx="179.558824" cy="175.381098" rx="1.61764706" ry="1.61890244"></ellipse>
                    <ellipse id="Oval-10-Copy" fill="#E0B4B7" opacity="0.35" cx="180.098039" cy="102.530488" rx="2.15686275" ry="2.15853659"></ellipse>
                    <path d="M28.9985381,29.9671598 L171.151018,132.876024" id="Path-11" stroke="#CFDAE6" opacity="0.8"></path>
                </g>
                <g id="Group-10" opacity="0.799999952" transform="translate(1054.100635, 36.659317) rotate(-11.000000) translate(-1054.100635, -36.659317) translate(1026.600635, 4.659317)">
                    <ellipse id="Oval-7" stroke="#CFDAE6" stroke-width="0.941176471" cx="43.8135593" cy="32" rx="11.1864407" ry="11.2941176"></ellipse>
                    <g id="Group-12" transform="translate(34.596774, 23.111111)" fill="#BACAD9">
                        <ellipse id="Oval-7" opacity="0.45" cx="9.18534718" cy="8.88888889" rx="8.47457627" ry="8.55614973"></ellipse>
                        <path d="M9.18534718,17.4450386 C13.8657264,17.4450386 17.6599235,13.6143199 17.6599235,8.88888889 C17.6599235,4.16345787 13.8657264,0.332739156 9.18534718,0.332739156 L9.18534718,17.4450386 Z" id="Oval-7"></path>
                    </g>
                    <path d="M34.6597385,24.809694 L5.71666084,4.76878945" id="Path-2" stroke="#CFDAE6" stroke-width="0.941176471"></path>
                    <ellipse id="Oval" stroke="#CFDAE6" stroke-width="0.941176471" cx="3.26271186" cy="3.29411765" rx="3.26271186" ry="3.29411765"></ellipse>
                    <ellipse id="Oval-Copy" fill="#F7E1AD" cx="2.79661017" cy="61.1764706" rx="2.79661017" ry="2.82352941"></ellipse>
                    <path d="M34.6312443,39.2922712 L5.06366663,59.785082" id="Path-10" stroke="#CFDAE6" stroke-width="0.941176471"></path>
                </g>
                <g id="Group-19" opacity="0.33" transform="translate(1282.537219, 446.502867) rotate(-10.000000) translate(-1282.537219, -446.502867) translate(1142.537219, 327.502867)">
                    <g id="Group-17" transform="translate(141.333539, 104.502742) rotate(275.000000) translate(-141.333539, -104.502742) translate(129.333539, 92.502742)" fill="#BACAD9">
                        <circle id="Oval-4" opacity="0.45" cx="11.6666667" cy="11.6666667" r="11.6666667"></circle>
                        <path d="M23.3333333,23.3333333 C23.3333333,16.8900113 18.1099887,11.6666667 11.6666667,11.6666667 C5.22334459,11.6666667 0,16.8900113 0,23.3333333 L23.3333333,23.3333333 Z" id="Oval-4" transform="translate(11.666667, 17.500000) scale(-1, -1) translate(-11.666667, -17.500000) "></path>
                    </g>
                    <circle id="Oval-5-Copy-6" fill="#CFDAE6" cx="201.833333" cy="87.5" r="5.83333333"></circle>
                    <path d="M143.5,88.8126685 L155.070501,17.6038544" id="Path-17" stroke="#BACAD9" stroke-width="1.16666667"></path>
                    <path d="M17.5,37.3333333 L127.466252,97.6449735" id="Path-18" stroke="#BACAD9" stroke-width="1.16666667"></path>
                    <polyline id="Path-19" stroke="#CFDAE6" stroke-width="1.16666667" points="143.902597 120.302281 174.935455 231.571342 38.5 147.510847 126.366941 110.833333"></polyline>
                    <path d="M159.833333,99.7453842 L195.416667,89.25" id="Path-20" stroke="#E0B4B7" stroke-width="1.16666667" opacity="0.6"></path>
                    <path d="M205.333333,82.1372105 L238.719406,36.1666667" id="Path-24" stroke="#BACAD9" stroke-width="1.16666667"></path>
                    <path d="M266.723424,132.231988 L207.083333,90.4166667" id="Path-25" stroke="#CFDAE6" stroke-width="1.16666667"></path>
                    <circle id="Oval-5" fill="#C1D1E0" cx="156.916667" cy="8.75" r="8.75"></circle>
                    <circle id="Oval-5-Copy-3" fill="#C1D1E0" cx="39.0833333" cy="148.75" r="5.25"></circle>
                    <circle id="Oval-5-Copy-2" fill-opacity="0.6" fill="#D1DEED" cx="8.75" cy="33.25" r="8.75"></circle>
                    <circle id="Oval-5-Copy-4" fill-opacity="0.6" fill="#D1DEED" cx="243.833333" cy="30.3333333" r="5.83333333"></circle>
                    <circle id="Oval-5-Copy-5" fill="#E0B4B7" cx="175.583333" cy="232.75" r="5.25"></circle>
                </g>
            </g>
        </g>
    </g>
</svg>);/* background-color: #112346; */background-repeat: no-repeat;background-position: center right;background-size: 100%;}.login-container {border-radius: 10px;margin: 0px auto;width: 350px;padding: 30px 35px 15px 35px;background: #fff;border: 1px solid #eaeaea;text-align: left;box-shadow: 0 0 20px 2px rgba(0, 0, 0, 0.1);}.title {margin: 0px auto 40px auto;text-align: center;color: #505458;}
</style>

注册组件---Register.vue

<template><div class="login-wrap"><el-form class="login-container"><h1 class="title">用户注册</h1><el-form-item label=""><el-input type="text" v-model="username" placeholder="账号" autocomplete="off"></el-input></el-form-item><el-form-item label=""><el-input type="password" v-model="password" placeholder="密码" autocomplete="off"></el-input></el-form-item><el-form-item><el-button type="primary" style="width:100%;" @click="doSubmit()">提交</el-button></el-form-item><el-row style="text-align: center;margin-top:-10px"><el-link type="primary">忘记密码</el-link><el-link type="primary" @click="gotoLogin()">用户登录</el-link></el-row></el-form></div>
</template>
<script>
export default {name: 'Register',data () {return {username : '',password:''}},methods:{gotoLogin(){//跳转this.$router.push('/');}}
}
</script><style scoped>.login-wrap {box-sizing: border-box;width: 100%;height: 100%;padding-top: 10%;background-image: url(data:image/svg+xml;base64,<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg width="1361px" height="609px" viewBox="0 0 1361 609" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <!-- Generator: Sketch 46.2 (44496) - http://www.bohemiancoding.com/sketch -->
    <title>Group 21</title>
    <desc>Created with Sketch.</desc>
    <defs></defs>
    <g id="Ant-Design-Pro-3.0" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <g id="账户密码登录-校验" transform="translate(-79.000000, -82.000000)">
            <g id="Group-21" transform="translate(77.000000, 73.000000)">
                <g id="Group-18" opacity="0.8" transform="translate(74.901416, 569.699158) rotate(-7.000000) translate(-74.901416, -569.699158) translate(4.901416, 525.199158)">
                    <ellipse id="Oval-11" fill="#CFDAE6" opacity="0.25" cx="63.5748792" cy="32.468367" rx="21.7830479" ry="21.766008"></ellipse>
                    <ellipse id="Oval-3" fill="#CFDAE6" opacity="0.599999964" cx="5.98746479" cy="13.8668601" rx="5.2173913" ry="5.21330997"></ellipse>
                    <path d="M38.1354514,88.3520215 C43.8984227,88.3520215 48.570234,83.6838647 48.570234,77.9254015 C48.570234,72.1669383 43.8984227,67.4987816 38.1354514,67.4987816 C32.3724801,67.4987816 27.7006688,72.1669383 27.7006688,77.9254015 C27.7006688,83.6838647 32.3724801,88.3520215 38.1354514,88.3520215 Z" id="Oval-3-Copy" fill="#CFDAE6" opacity="0.45"></path>
                    <path d="M64.2775582,33.1704963 L119.185836,16.5654915" id="Path-12" stroke="#CFDAE6" stroke-width="1.73913043" stroke-linecap="round" stroke-linejoin="round"></path>
                    <path d="M42.1431708,26.5002681 L7.71190162,14.5640702" id="Path-16" stroke="#E0B4B7" stroke-width="0.702678964" opacity="0.7" stroke-linecap="round" stroke-linejoin="round" stroke-dasharray="1.405357899873153,2.108036953469981"></path>
                    <path d="M63.9262187,33.521561 L43.6721326,69.3250951" id="Path-15" stroke="#BACAD9" stroke-width="0.702678964" stroke-linecap="round" stroke-linejoin="round" stroke-dasharray="1.405357899873153,2.108036953469981"></path>
                    <g id="Group-17" transform="translate(126.850922, 13.543654) rotate(30.000000) translate(-126.850922, -13.543654) translate(117.285705, 4.381889)" fill="#CFDAE6">
                        <ellipse id="Oval-4" opacity="0.45" cx="9.13482653" cy="9.12768076" rx="9.13482653" ry="9.12768076"></ellipse>
                        <path d="M18.2696531,18.2553615 C18.2696531,13.2142826 14.1798519,9.12768076 9.13482653,9.12768076 C4.08980114,9.12768076 0,13.2142826 0,18.2553615 L18.2696531,18.2553615 Z" id="Oval-4" transform="translate(9.134827, 13.691521) scale(-1, -1) translate(-9.134827, -13.691521) "></path>
                    </g>
                </g>
                <g id="Group-14" transform="translate(216.294700, 123.725600) rotate(-5.000000) translate(-216.294700, -123.725600) translate(106.294700, 35.225600)">
                    <ellipse id="Oval-2" fill="#CFDAE6" opacity="0.25" cx="29.1176471" cy="29.1402439" rx="29.1176471" ry="29.1402439"></ellipse>
                    <ellipse id="Oval-2" fill="#CFDAE6" opacity="0.3" cx="29.1176471" cy="29.1402439" rx="21.5686275" ry="21.5853659"></ellipse>
                    <ellipse id="Oval-2-Copy" stroke="#CFDAE6" opacity="0.4" cx="179.019608" cy="138.146341" rx="23.7254902" ry="23.7439024"></ellipse>
                    <ellipse id="Oval-2" fill="#BACAD9" opacity="0.5" cx="29.1176471" cy="29.1402439" rx="10.7843137" ry="10.7926829"></ellipse>
                    <path d="M29.1176471,39.9329268 L29.1176471,18.347561 C23.1616351,18.347561 18.3333333,23.1796097 18.3333333,29.1402439 C18.3333333,35.1008781 23.1616351,39.9329268 29.1176471,39.9329268 Z" id="Oval-2" fill="#BACAD9"></path>
                    <g id="Group-9" opacity="0.45" transform="translate(172.000000, 131.000000)" fill="#E6A1A6">
                        <ellipse id="Oval-2-Copy-2" cx="7.01960784" cy="7.14634146" rx="6.47058824" ry="6.47560976"></ellipse>
                        <path d="M0.549019608,13.6219512 C4.12262681,13.6219512 7.01960784,10.722722 7.01960784,7.14634146 C7.01960784,3.56996095 4.12262681,0.670731707 0.549019608,0.670731707 L0.549019608,13.6219512 Z" id="Oval-2-Copy-2" transform="translate(3.784314, 7.146341) scale(-1, 1) translate(-3.784314, -7.146341) "></path>
                    </g>
                    <ellipse id="Oval-10" fill="#CFDAE6" cx="218.382353" cy="138.685976" rx="1.61764706" ry="1.61890244"></ellipse>
                    <ellipse id="Oval-10-Copy-2" fill="#E0B4B7" opacity="0.35" cx="179.558824" cy="175.381098" rx="1.61764706" ry="1.61890244"></ellipse>
                    <ellipse id="Oval-10-Copy" fill="#E0B4B7" opacity="0.35" cx="180.098039" cy="102.530488" rx="2.15686275" ry="2.15853659"></ellipse>
                    <path d="M28.9985381,29.9671598 L171.151018,132.876024" id="Path-11" stroke="#CFDAE6" opacity="0.8"></path>
                </g>
                <g id="Group-10" opacity="0.799999952" transform="translate(1054.100635, 36.659317) rotate(-11.000000) translate(-1054.100635, -36.659317) translate(1026.600635, 4.659317)">
                    <ellipse id="Oval-7" stroke="#CFDAE6" stroke-width="0.941176471" cx="43.8135593" cy="32" rx="11.1864407" ry="11.2941176"></ellipse>
                    <g id="Group-12" transform="translate(34.596774, 23.111111)" fill="#BACAD9">
                        <ellipse id="Oval-7" opacity="0.45" cx="9.18534718" cy="8.88888889" rx="8.47457627" ry="8.55614973"></ellipse>
                        <path d="M9.18534718,17.4450386 C13.8657264,17.4450386 17.6599235,13.6143199 17.6599235,8.88888889 C17.6599235,4.16345787 13.8657264,0.332739156 9.18534718,0.332739156 L9.18534718,17.4450386 Z" id="Oval-7"></path>
                    </g>
                    <path d="M34.6597385,24.809694 L5.71666084,4.76878945" id="Path-2" stroke="#CFDAE6" stroke-width="0.941176471"></path>
                    <ellipse id="Oval" stroke="#CFDAE6" stroke-width="0.941176471" cx="3.26271186" cy="3.29411765" rx="3.26271186" ry="3.29411765"></ellipse>
                    <ellipse id="Oval-Copy" fill="#F7E1AD" cx="2.79661017" cy="61.1764706" rx="2.79661017" ry="2.82352941"></ellipse>
                    <path d="M34.6312443,39.2922712 L5.06366663,59.785082" id="Path-10" stroke="#CFDAE6" stroke-width="0.941176471"></path>
                </g>
                <g id="Group-19" opacity="0.33" transform="translate(1282.537219, 446.502867) rotate(-10.000000) translate(-1282.537219, -446.502867) translate(1142.537219, 327.502867)">
                    <g id="Group-17" transform="translate(141.333539, 104.502742) rotate(275.000000) translate(-141.333539, -104.502742) translate(129.333539, 92.502742)" fill="#BACAD9">
                        <circle id="Oval-4" opacity="0.45" cx="11.6666667" cy="11.6666667" r="11.6666667"></circle>
                        <path d="M23.3333333,23.3333333 C23.3333333,16.8900113 18.1099887,11.6666667 11.6666667,11.6666667 C5.22334459,11.6666667 0,16.8900113 0,23.3333333 L23.3333333,23.3333333 Z" id="Oval-4" transform="translate(11.666667, 17.500000) scale(-1, -1) translate(-11.666667, -17.500000) "></path>
                    </g>
                    <circle id="Oval-5-Copy-6" fill="#CFDAE6" cx="201.833333" cy="87.5" r="5.83333333"></circle>
                    <path d="M143.5,88.8126685 L155.070501,17.6038544" id="Path-17" stroke="#BACAD9" stroke-width="1.16666667"></path>
                    <path d="M17.5,37.3333333 L127.466252,97.6449735" id="Path-18" stroke="#BACAD9" stroke-width="1.16666667"></path>
                    <polyline id="Path-19" stroke="#CFDAE6" stroke-width="1.16666667" points="143.902597 120.302281 174.935455 231.571342 38.5 147.510847 126.366941 110.833333"></polyline>
                    <path d="M159.833333,99.7453842 L195.416667,89.25" id="Path-20" stroke="#E0B4B7" stroke-width="1.16666667" opacity="0.6"></path>
                    <path d="M205.333333,82.1372105 L238.719406,36.1666667" id="Path-24" stroke="#BACAD9" stroke-width="1.16666667"></path>
                    <path d="M266.723424,132.231988 L207.083333,90.4166667" id="Path-25" stroke="#CFDAE6" stroke-width="1.16666667"></path>
                    <circle id="Oval-5" fill="#C1D1E0" cx="156.916667" cy="8.75" r="8.75"></circle>
                    <circle id="Oval-5-Copy-3" fill="#C1D1E0" cx="39.0833333" cy="148.75" r="5.25"></circle>
                    <circle id="Oval-5-Copy-2" fill-opacity="0.6" fill="#D1DEED" cx="8.75" cy="33.25" r="8.75"></circle>
                    <circle id="Oval-5-Copy-4" fill-opacity="0.6" fill="#D1DEED" cx="243.833333" cy="30.3333333" r="5.83333333"></circle>
                    <circle id="Oval-5-Copy-5" fill="#E0B4B7" cx="175.583333" cy="232.75" r="5.25"></circle>
                </g>
            </g>
        </g>
    </g>
</svg>);/* background-color: #112346; */background-repeat: no-repeat;background-position: center right;background-size: 100%;}.login-container {border-radius: 10px;margin: 0px auto;width: 350px;padding: 30px 35px 15px 35px;background: #fff;border: 1px solid #eaeaea;text-align: left;box-shadow: 0 0 20px 2px rgba(0, 0, 0, 0.1);}.title {margin: 0px auto 40px auto;text-align: center;color: #505458;}
</style>

定义组件与路由的对应关系

import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
import Login from '@/views/Login'
import Register from '@/views/Register'Vue.use(Router)export default new Router({routes: [{path: '/',name: 'Login',component: Login},{path: '/Register',name: 'Register',component: Register}]
})

效果演示：

三、前后端数据交互

使用SSM项目构建Java后台，模拟提供一个用户登录的action地址，Vue通过请求指定的用户登录接口。

1.安装axios

axios是vue2提倡使用的轻量版的ajax。它是基于promise的HTTP库。它会从浏览器中创建 XMLHttpRequests，与Vue配合使用非常好。

vue.js有著名的全家桶系列：vue-router，vuex， vue-resource，再加上构建工具vue-cli，就是一个完整的vue项目的核心构成。其中vue-resource是Vue.js的一款插件，它可以通过XMLHttpRequest或JSONP发起请求并处理响应，但在vue更新到2.0之后，作者就宣告不再对vue-resource更新，而是推荐的axios

安装指令

npm i axios -S

"qs"通常指的是"query string"，即查询字符串。查询字符串是URL中的一部分，用于传递参数给服务器。在Vue中，我们可以使用"qs"库来处理和解析查询字符串和传参问题。

"qs"库是一个用于序列化和解析URL查询字符串的JavaScript库。它提供了一组方法，可以将JavaScript对象转换为查询字符串，或将查询字符串解析为JavaScript对象。通过使用"qs"库，我们可以方便地处理URL中的查询参数，例如在发送HTTP请求时将参数序列化为查询字符串，或在接收到查询字符串时将其解析为JavaScript对象进行处理。通过使用"qs"库，我们可以更方便地处理Vue应用程序中的查询字符串，提高开发效率。

安装指令

npm i qs -S

Vue Axios是一个基于Promise的HTTP客户端，用于在Vue.js应用程序中发送HTTP请求。它是基于Axios库的封装，提供了一种简洁、灵活和强大的方式来处理HTTP请求和响应。

使用Vue Axios，你可以轻松地发送GET、POST、PUT、DELETE等不同类型的请求，并处理服务器返回的数据。它还支持拦截器，可以在请求发送前或响应返回后对请求进行拦截和处理。此外，Vue Axios还提供了取消请求、设置请求头、处理错误等功能，使得与后端API进行交互变得更加方便和可靠。通过Vue Axios，还可以在Vue.js应用程序中轻松地集成和管理HTTP请求，从而更好地处理数据交互和与后端API进行通信。

安装指令

npm i vue-axios -S

2.导入api模块，添加axios的全局配置

将api模块导入到SPA项目的src目录下，其中api模块包含了action.js（针对后台请求接口的封装定义）和http.js（针对axios的全局配置）两个文件。

action.js

/*** 对后台请求的地址的封装，URL格式如下：* 模块名_实体名_操作*/
export default {'SERVER': 'http://localhost:8080/ssm/', //服务器url'SYSTEM_USER_DOLOGIN': 'user/userLogin', //登陆'SYSTEM_USER_DOREG': 'user/userRegister', //注册'getFullPath': k => { //获得请求的完整地址，用于mockjs测试时使用return this.SERVER + this[k];}
}

http.js

/*** vue项目对axios的全局配置*/
import axios from 'axios'
import qs from 'qs'//引入action模块，并添加至axios的类属性urls上
import action from '@/api/action'
axios.urls = action// axios默认配置
axios.defaults.timeout = 10000; // 超时时间
// axios.defaults.baseURL = 'http://localhost:8080/j2ee15'; // 默认地址
axios.defaults.baseURL = action.SERVER;//整理数据
// 只适用于 POST,PUT,PATCH，transformRequest` 允许在向服务器发送前，修改请求数据
axios.defaults.transformRequest = function(data) {data = qs.stringify(data);return data;
};// 请求拦截器
axios.interceptors.request.use(function(config) {return config;
}, function(error) {return Promise.reject(error);
});// 响应拦截器
axios.interceptors.response.use(function(response) {return response;
}, function(error) {return Promise.reject(error);
});export default axios;

3.修改main.js配置vue-axios

在main.js文件中引入api模块和vue-axios模块

import axios from '@/api/http'                 
import VueAxios from 'vue-axios' Vue.use(VueAxios,axios)

4.数据表数据

5.编写后端登录注册controller层

package com.ctb.ssm.controller;import com.ctb.ssm.service.IUserService;
import com.ctb.ssm.util.JsonResponseBody;
import com.ctb.ssm.util.PageBean;
import com.ctb.ssm.vo.UserVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
import java.util.Map;
import com.ctb.ssm.jwt.*;@Controller
@RequestMapping("/user")
public class UserController {@Autowiredprivate IUserService userService;/*** 登录* @param userVo* @param response* @return*/@RequestMapping("/userLogin")@ResponseBodypublic JsonResponseBody<?> userLogin(UserVo userVo, HttpServletResponse response){if(userVo.getUsername().equals("admin")&&userVo.getPassword().equals("123")){//私有要求claim
//            Map<String,Object> json=new HashMap<String,Object>();
//            json.put("username", userVo.getUsername());//生成JWT，并设置到response响应头中
//            String jwt=JwtUtils.createJwt(json, JwtUtils.JWT_WEB_TTL);
//            response.setHeader(JwtUtils.JWT_HEADER_KEY, jwt);return new JsonResponseBody<>("用户登陆成功！",true,0,null);}else{return new JsonResponseBody<>("用户名或密码错误！",false,0,null);}}/*** 注册* @param userVo* @param response* @return*/@RequestMapping("/userRegister")@ResponseBodypublic JsonResponseBody<?> userRegister(UserVo userVo, HttpServletResponse response){userVo.setId("9");int i = userService.insertSelective(userVo);if(i>0){return new JsonResponseBody<>("用户注册成功！",true,0,null);}else{return new JsonResponseBody<>("用户注册失败！",false,0,null);}}
}

6.使用封装后的axios发送请求

Login.vue登录提交中发get请求

<template><div class="login-wrap"><el-form class="login-container"><h1 class="title">用户登录</h1><el-form-item label=""><el-input type="text" v-model="username" placeholder="登录账号" autocomplete="off"></el-input></el-form-item><el-form-item label=""><el-input type="password" v-model="password" placeholder="登录密码" autocomplete="off"></el-input></el-form-item><el-form-item><el-button type="primary" style="width:100%;" @click="doSubmit()">提交</el-button></el-form-item><el-row style="text-align: center;margin-top:-10px"><el-link type="primary">忘记密码</el-link><el-link type="primary" @click="gotoRegister()">用户注册</el-link></el-row></el-form></div>
</template><script>import axios from 'axios'import qs from 'qs'
export default {name: 'Login',data () {return {username: '',password: ''}},methods:{gotoRegister(){this.$router.push('/Register');},doSubmit(){let url = this.axios.urls.SYSTEM_USER_DOLOGIN;let params = {username: this.username,password: this.password};//get请求axios.get(url, {params: params}).then(r => {console.log(r);if (r.data.success) {this.$message({message: r.data.msg,type: 'success'});} else {this.$message.error(r.data.msg);}}).catch(e => {});//post请求// axios.post(url,params).then(r => {//   console.log(r);//   if (r.data.success) {//     this.$message({//       message: r.data.msg,//       type: 'success'//     });//   } else {//     this.$message.error(r.data.msg);//   }// }).catch(e => {// });}}
}
</script><style scoped>.login-wrap {box-sizing: border-box;width: 100%;height: 100%;padding-top: 10%;background-image: url('../assets/cfpl.png');background-repeat: no-repeat;background-position: center right;background-size: 100%;}
.login-container {border-radius: 10px;margin: 0px auto;width: 350px;padding: 30px 35px 15px 35px;background: #fff;border: 1px solid #eaeaea;text-align: left;box-shadow: 0 0 20px 2px rgba(0, 0, 0, 0.1);
}.title {margin: 0px auto 40px auto;text-align: center;color: #505458;
}
</style>

Register.vue注册提交中发post请求

<template><div class="login-wrap"><el-form class="login-container"><h1 class="title">用户注册</h1><el-form-item label=""><el-input type="text" v-model="username" placeholder="注册账号" autocomplete="off"></el-input></el-form-item><el-form-item label=""><el-input type="password" v-model="password" placeholder="注册密码" autocomplete="off"></el-input></el-form-item><el-form-item><el-button type="primary" style="width:100%;" @click="doSubmit()">提交</el-button></el-form-item><el-row style="text-align: center;margin-top:-10px"><el-link type="primary">忘记密码</el-link><el-link type="primary" @click="gotoLogin()">用户登录</el-link></el-row></el-form></div>
</template><script>
export default {name: 'Register',data () {return {username: '',password: ''}},methods:{gotoLogin(){this.$router.push('/');},doSubmit(){let url = this.axios.urls.SYSTEM_USER_DOREG;let params = {username: this.username,password: this.password};this.axios.post(url,params).then(r => {console.log(r);if (r.data.success) {this.$message({message: r.data.msg,type: 'success'});//注册完成后自动进入登入界面this.$router.push('/');} else {this.$message.error(r.data.msg);}}).catch(e => {console.log(e);});}}
}
</script><style scoped>.login-wrap {box-sizing: border-box;width: 100%;height: 100%;padding-top: 10%;background-image: url('../assets/cfpl.png');background-repeat: no-repeat;background-position: center right;background-size: 100%;}
.login-container {border-radius: 10px;margin: 0px auto;width: 350px;padding: 30px 35px 15px 35px;background: #fff;border: 1px solid #eaeaea;text-align: left;box-shadow: 0 0 20px 2px rgba(0, 0, 0, 0.1);
}.title {margin: 0px auto 40px auto;text-align: center;color: #505458;
}
</style>

7.测试

在前后端分离后我们需同时运行前后端项目，那么我们的前后端项目所用端口号为避免发生冲突，应修改为不同的，如后端Tomcat运行端口号为8080，那我们的SPA项目端口号应为其它。

我们应该如何修改SPA项目的端口号呢？

在config/index.js中进行修改

注意：

端口号的范围是从0到65535。

0到1023的端口号被称为"知名端口"，用于一些常见的网络服务；

1024到49151的端口号被称为"注册端口"，用于一些已经注册的应用程序；

49152到65535的端口号被称为"动态或私有端口"，用于临时分配给客户端应用程序。

登录效果演示

注册效果演示

数据库数据展示

四、CORS跨域

1.什么是CORS？

CORS是一种浏览器安全机制，用于限制跨域资源的访问。当浏览器发起跨域请求时，会先向目标服务器发送一个预检请求（OPTIONS请求），以确定是否允许跨域访问。如果服务器返回的响应中包含了合适的CORS头部信息，浏览器才会继续发送真正的跨域请求。

2.为什么会出现CORS问题？

前端代码通过AJAX或Fetch API向不同域的服务器发送请求。
前端代码中使用了不同域的资源，比如字体、图片、脚本等。

3.特点

安全性高：CORS 是一种安全的跨域访问解决方案，通过限制允许跨域访问的源和方法，可以有效地防止恶意攻击。
灵活性强：CORS 支持不同类型的请求，包括 GET、POST、PUT、DELETE 等，同时也支持不同类型的数据传输格式，比如 JSON、XML 等。
无需修改客户端代码：CORS 是一种服务器端的解决方案，因此无需修改客户端代码即可实现跨域访问。
无需额外授权：与 JSONP 不同，CORS 不需要额外授权，只需在服务器端设置响应头即可。

4.如何解决CORS问题？

服务器端设置CORS头部信息：在服务器端的响应中添加合适的CORS头部信息，允许指定的域进行跨域访问。可以通过设置Access-Control-Allow-Origin、Access-Control-Allow-Methods、Access-Control-Allow-Headers等头部字段来控制跨域访问的权限。

Access-Control-Allow-Origin: * // 允许所有域名访问
Access-Control-Allow-Methods: GET, POST, PUT, DELETE // 允许的请求方法
Access-Control-Allow-Headers: Content-Type // 允许的请求头

使用代理服务器：通过在同域下设置一个代理服务器，将跨域请求转发到目标服务器，然后将响应返回给前端。这样前端代码就可以绕过CORS限制，实现跨域访问。
JSONP：JSONP（JSON with Padding）是一种利用script标签跨域获取数据的方法。它的原理是利用script标签可以跨域加载资源的特性，通过动态创建script标签，向服务器请求JSON数据，从而实现跨域获取数据。需要注意的是，JSONP只支持GET请求。

5.跨域问题处理

需要配置tomcat允许跨域访问,需编写一个过滤器，添加一个响应头Access-Control-Allow-Origin即可

package com.ctb.ssm.util;import java.io.IOException;import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;/*** 配置tomcat允许跨域访问* * @author Administrator**/
public class CorsFilter2 implements Filter {@Overridepublic void init(FilterConfig filterConfig) throws ServletException {}@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)throws IOException, ServletException {HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;// Access-Control-Allow-Origin就是我们需要设置的域名// Access-Control-Allow-Headers跨域允许包含的头。// Access-Control-Allow-Methods是允许的请求方式httpResponse.setHeader("Access-Control-Allow-Origin", "*");// *,任何域名httpResponse.setHeader("Access-Control-Allow-Headers", "responseType,Origin, X-Requested-With, Content-Type, Accept");httpResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE");//允许客户端处理一个新的响应头jwt//httpResponse.setHeader("Access-Control-Expose-Headers", "jwt,Content-Disposition");filterChain.doFilter(servletRequest, servletResponse);}@Overridepublic void destroy() {}
}

将Tomcat跨域处理配置到web.xml中，对所有请求进行拦截处理

<!--CrosFilter跨域过滤器--><filter><filter-name>corsFilter</filter-name><filter-class>com.ctb.ssm.util.CorsFilter2</filter-class></filter><filter-mapping><filter-name>corsFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping>

它设置了适当的 CORS 响应头，以允许跨域请求，包括允许的来源域、请求头和请求方法，有效的控制跨域访问的权限，解决跨域问题。