“构建完善的用户认证与数据交互系统“

引言

在现代Web应用程序开发中，用户认证和数据交互是至关重要的功能。本文将介绍如何使用ElementUI、axios和解决跨域问题来构建一个完善的用户认证与数据交互系统。我们将分别探讨ElementUI完成登录注册、axios之get请求、axios之post请求以及跨域问题的解决方案。

1.ElementUI完成登录注册

在构建一个Web应用程序时，用户登录和注册是必不可少的功能。ElementUI是一个流行的Vue.js组件库，提供了丰富的UI组件和样式，使得开发者可以轻松地构建出漂亮且易用的登录和注册页面。本节将介绍如何使用ElementUI来完成登录和注册功能，并展示一些常用的验证和表单处理技巧。

1. 登录页面设计与实现

main.js

// 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 */
import axios from '@/api/http'
import VueAxios from 'vue-axios'Vue.use(VueAxios,axios)
new Vue({el: '#app',router,components: { App },template: '<App/>'
})

// 新添加3
Vue.use(ElementUI)
Vue.config.productionTip = false

在app后面添加
重要的事情说三遍：在指定位置!!!在指定位置!!!在指定位置!!!~~~添加三行代码
配置路由

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}]
})

登录界面

    <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.$router.push('/Register');},doSubmit() {let url = this.axios.urls.SYSTEM_USER_DOLOGIN;let params = {username: this.username,password: this.password}this.axios.post(url, params).then(r => {console.log(r)if (r.data.success) {this.$message({type: 'success',message: r.data.msg});this.$router.push('/Register');}else{console.log(r)this.$message(r.data.msg)}}).catch(e => {})}}}</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>

App.vue样式

<style> 
html,
body {width: 100%;height: 100%;box-sizing: border-box;padding: 0px;margin: 0px;
}
#app {font-family: "Avenir", Helvetica, Arial, sans-serif;-webkit-font-smoothing: antialiased;-moz-osx-font-smoothing: grayscale;color: #2c3e50;widows: 100%;height: 100%;
}
</style>

2. 注册页面设计与实现

注册页面与登录页面类似，也需要一个表单来接收用户输入的注册信息，并提供注册按钮来提交表单。在注册页面中，我们还可以使用ElementUI的其他组件，如下拉框、日期选择器等，来提供更多的注册选项。同样，我们也可以利用ElementUI的表单验证功能来确保用户输入的合法性。

<template><div class="register-container"><div class="register-card"><h2 class="register-title">注册</h2><form @submit.prevent="register" class="register-form"><div class="form-group"><label for="username" class="register-label">用户名:</label><input type="text" id="username" v-model="username" required class="register-input"></div><div class="form-group"><label for="password" class="register-label">密码:</label><input type="password" id="password" v-model="password" required class="register-input"></div><div class="form-group"><label for="password" class="register-label">编号:</label><input type="password" id="id" v-model="id" required class="register-input"></div><button type="submit" class="register-button">注册</button></form><div class="login-link"><span>已有账号？</span><el-link type="primary" @click="gotoLogin()">用户登录</el-link></div></div></div>
</template><style>
.register-container {display: flex;flex-direction: column;align-items: center;justify-content: center;height: 100vh;background-color: #f5f5f5;
}.register-card {display: flex;flex-direction: column;align-items: center;background-color: #fff;padding: 40px;border-radius: 4px;box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}.register-title {font-size: 24px;color: #333;margin-bottom: 20px;
}.register-form {display: flex;flex-direction: column;align-items: center;
}.form-group {margin-bottom: 20px;
}.register-label {font-size: 16px;color: #333;margin-bottom: 10px;
}.register-input {padding: 8px;border: 1px solid #ccc;border-radius: 4px;width: 200px;
}.register-button {padding: 10px 20px;background-color: #ff6700;color: #fff;border: none;border-radius: 4px;cursor: pointer;
}.login-link {margin-top: 20px;display: flex;align-items: center;
}.login-link span {color: #555;
}.login-button {margin-left: 5px;color: #007bff;text-decoration: none;
}
</style><script>
export default {data() {return {username: '',password: '',id:''};},methods: {register() {let url = this.axios.urls.SYSTEM_USER_DOREG;let params = {username: this.username,password: this.password,id:this.id}
console.log(url)this.axios.post(url, params).then(r => {console.log(r)if (r.data.success) {this.$message({type: 'success',message: r.data.msg});}else{console.log(r)this.$message(r.data.msg)}}).catch(e => {})},gotoLogin(){this.$router.push('/');}}
};
</script>

后台代码

package com.zking.ssm.controller;import com.zking.ssm.model.User;
import com.zking.ssm.service.IUserService;
import com.zking.ssm.util.JsonResponseBody;
import com.zking.ssm.util.PageBean;
import com.zking.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.HashMap;
import java.util.List;
import java.util.Map;
import com.zking.ssm.jwt.*;@Controller
@RequestMapping("/user")
public class UserController {@Autowiredprivate IUserService userService;@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);}}@RequestMapping("/userRegister")@ResponseBodypublic JsonResponseBody<?> Register(User user, HttpServletResponse response) {if (user.getUsername() != null && user.getPassword() != null && user != null) {int n = userService.insertSelective(user);if (n > 0) {return new JsonResponseBody<>("注册成功！", true, 0, null);}}return new JsonResponseBody<>("用户名或密码错误！", false, 0, null);}@RequestMapping("/queryUserPager")@ResponseBodypublic JsonResponseBody<List<Map<String,Object>>>queryUserPager(UserVo userVo, HttpServletRequest request){try {PageBean pageBean=new PageBean();pageBean.setRequest(request);List<Map<String, Object>> users = userService.queryUserPager(userVo, pageBean);return new JsonResponseBody<>("OK",true,pageBean.getTotal(),users);} catch (Exception e) {e.printStackTrace();return new JsonResponseBody<>("分页查询用户信息失败！",false,0,null);}}
}

2.axios之get请求

在现代Web应用程序中，与后端服务器进行数据交互是非常常见的需求。axios是一个基于Promise的HTTP客户端，可以在浏览器和Node.js中发送HTTP请求。本节将介绍如何使用axios发送GET请求，并展示一些常用的请求参数配置和响应处理技巧。

项目下输入下面代码回车下载
npm i axios -S

   doSubmit() {let url = "http://localhost:8080/user/userLogin"let params = {username: this.username,password: this.password}axios.get(url, {params: params}).then(r => {console.log(r)if (r.data.success) {this.$message({type: 'success',message: r.data.msg});this.$router.push('/Register');}else{console.log(r)this.$message(r.data.msg)}}).catch(e => {})}

3.axios之post请求

除了GET请求，POST请求也是常用的数据交互方式之一。POST请求通常用于向服务器提交数据，如用户注册、表单提交等。本节将介绍如何使用axios发送POST请求，并展示一些常用的请求参数配置和响应处理技巧。
项目下输入下面代码回车下载
npm install qs -S
npm i vue-axios -S

 doSubmit() {let url = this.axios.urls.SYSTEM_USER_DOLOGIN;let params = {username: this.username,password: this.password}this.axios.post(url, params).then(r => {console.log(r)if (r.data.success) {this.$message({type: 'success',message: r.data.msg});this.$router.push('/Register');}else{console.log(r)this.$message(r.data.msg)}}).catch(e => {})}

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', //服务器'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

/*** 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', //服务器'SYSTEM_USER_DOLOGIN': '/user/userLogin', //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];}
}

4.跨域问题的解决方案

在前后端分离的开发模式中，前端代码通常运行在一个独立的域名或端口上，而后端API则运行在另一个域名或端口上。由于浏览器的同源策略限制，跨域请求会受到限制。本节将介绍一些常用的跨域解决方案，如JSONP、CORS等，并展示如何使用axios来处理跨域请求。

web.xml配置过滤器

 <!--CrosFilter跨域过滤器--><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>

过滤器

package com.zking.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() {}
}

5.总结

本文介绍了如何使用ElementUI、axios和解决跨域问题来构建一个完善的用户认证与数据交互系统。我们分别探讨了ElementUI完成登录注册、axios之get请求、axios之post请求以及跨域问题的解决方案。通过学习本文，您将掌握一些高级的前端技术实践，能够更好地应对现代Web应用程序开发中的挑战。希望本文对您有所帮助，谢谢阅读！