Vue简单项目登录注册页面实现,axios请求方式以及跨越问题的解决

柔光的暖阳◎ 2023-10-13 22:07 45阅读 0赞

## Vue简单项目登录注册页面实现 ##

### 1.使用vue-cli构建Vuetest项目 ###

构建项目由于在上一节已经实现，在这里就不过多赘述  
首先我们打开到昨天项目的目录，输入

npm install element-ui -S

打开项目的**package.json**文件可查看具体添加模块信息，发现element-ui已经下载成功。  
![在这里插入图片描述][e23e9601eff04536922473dc528baeb3.png]

### 2.登录注册页面静态实现 ###

**第一步**：在src目录下创建views目录（该目录用于存放vue组件）。

**第二步**：在main.js中引入element-ui模块

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/>'
    })

重要的事情：在指定位置!!!在指定位置!!!在指定位置!!!~~~添加三行代码  
在官网粘贴一些代码过来，显示效果  
![在这里插入图片描述][0fe5dd79867047ad83108f5d5eb7c4fc.png]

![在这里插入图片描述][0fb3e4ce75cf45e5bc836a4956a0e69c.png]

**第三步**：创建用户登录组件`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 {
          
          msg: 'Welcome to Your Vue.js App'
        }
      }
    }
    </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>

**第四步**：配置路由  
在`router/index.js`中修改vue项目默认显示路由

import Vue from 'vue'
    import Router from 'vue-router'
    import HelloWorld from '@/components/HelloWorld'
    // 导入Login登录组件
    import Login from '@/views/Login'
    
    Vue.use(Router)
    
    export default new Router({
        
      routes: [
        {
        
            path: '/',   //设置默认显示路由
            name: 'Login',
            component: Login
        },
        {
        
            path: '/HelloWorld',
            name: 'HelloWorld',
            component: HelloWorld
        }
      ]
    })

\*\*第五步：\*\*修改项目端口并启动  
在`config/index.js`目录下修改vue项目运行端口：

const path = require('path')
    
    module.exports = {
        
      dev: {
        
    
        // Paths
        assetsSubDirectory: 'static',
        assetsPublicPath: '/',
        proxyTable: {
        },
    
        // Various Dev Server settings
        host: 'localhost', // can be overwritten by process.env.HOST
        port: 8083, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined
        autoOpenBrowser: false,
        errorOverlay: true,
        notifyOnErrors: true,
        ...
      },
    
      build: {
        
        ...
      }
    }

命令行启动前端项目效果  
![在这里插入图片描述][f2e0435ac99c45d9a0d19f4520f87698.png]

### 3.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。

#### 3.1.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。

> 题外话：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

npm i axios -S

#### 3.2.axios之get ####

使用axios的get请求方式，**必须将请求参数保存到json对象的params属性中**。

![在这里插入图片描述][d702c4c2a387438a8f0eca10fc543c47.gif_pic_center]

#### 3.3.axios之post ####

使用axios的post请求方式，**直接将请求参数保存到json对象中即可**。

**问题点：post请求数据格式问题**

axios.get提交没有问题，axios.post提交后台接收不到数据，因为POST提交的参数的格式是Request Payload，这样后台取不到数据的。

###### \*\*解决方案：\*\*使用qs.js库，将\{a:‘b’,c:‘d’\}转换成’a=b&c=d’ ######

## 下载qs库
    npm install qs -S
    ## 在Login.vue组件中导入qs
    import qs from 'qs'
    ## 通过qs的stringify方法进行格式转换
    let str=qs.stringify(params);

![在这里插入图片描述][20a9981704f341ee9ba7b9e78a8d99ef.png]

#### 3.4.vue-axios ####

Axios是一个基于Promise 用于浏览器和 nodejs 的 HTTP 客户端，本质上也是对原生XHR的封装，只不过它是Promise的实现版本，符合最新的ES规范。

> vue-axios是在axios基础上扩展的插件，在Vue.prototype原型上扩展了$http等属性，可以更加方便的使用axios。

通过vue-axios实现对axios的轻量封装：

**第一步**：下载安装vue-axios

npm i vue-axios -S

**第二步**：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**

export default {
        
    	'SERVER': 'http://localhost:8080/j2ee15', //服务器
    	'SYSTEM_USER_DOLOGIN': '/userAction.action', //登陆
    	'SYSTEM_USER_DOREG': '/userAction.action', //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];
    	}
    }

对后台请求的地址的封装，URL格式：模块名\_实体名\_操作

*  **http.js**

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;

\*\*第三步：\*\*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)

\*\*第四步：\*\*使用封装后的axios发送请求

从Login.vue组件中移除导入的axios和qs模块

//import axios from 'axios'
    //import qs from 'qs'

使用全局的axios发送请求

let url=this.axios.urls.SYSTEM_USER_DOLOGIN;
    this.axios.post(url,params).then(function(response) {
        
    	console.log(response);
    }).catch(function(error) {
        
    	console.log(error);
    });

### 4.跨域问题 ###

原来在后端web.xml中有这样一段代码  
是解决了跨域问题的

<filter>
        <filter-name>corsFilter</filter-name>
        <filter-class>com.zking.ssm.util.CorsFilter2</filter-class>
      </filter>
      <filter-mapping>
        <filter-name>corsFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>

当我们把它注释掉，就会出现  
![在这里插入图片描述][0a0c0a89f318472f824ea662d43ef7ea.png]  
看看代码  
![在这里插入图片描述][a1c43c8394c04e35a95e128ef9873e16.png]

[e23e9601eff04536922473dc528baeb3.png]: https://img-blog.csdnimg.cn/e23e9601eff04536922473dc528baeb3.png
[0fe5dd79867047ad83108f5d5eb7c4fc.png]: https://img-blog.csdnimg.cn/0fe5dd79867047ad83108f5d5eb7c4fc.png
[0fb3e4ce75cf45e5bc836a4956a0e69c.png]: https://img-blog.csdnimg.cn/0fb3e4ce75cf45e5bc836a4956a0e69c.png
[f2e0435ac99c45d9a0d19f4520f87698.png]: https://img-blog.csdnimg.cn/f2e0435ac99c45d9a0d19f4520f87698.png
[d702c4c2a387438a8f0eca10fc543c47.gif_pic_center]: https://img-blog.csdnimg.cn/d702c4c2a387438a8f0eca10fc543c47.gif#pic_center
[20a9981704f341ee9ba7b9e78a8d99ef.png]: https://img-blog.csdnimg.cn/20a9981704f341ee9ba7b9e78a8d99ef.png
[0a0c0a89f318472f824ea662d43ef7ea.png]: https://img-blog.csdnimg.cn/0a0c0a89f318472f824ea662d43ef7ea.png
[a1c43c8394c04e35a95e128ef9873e16.png]: https://img-blog.csdnimg.cn/a1c43c8394c04e35a95e128ef9873e16.png