Vue使用axios(Ajax)+ElementUI實(shí)現(xiàn)登錄實(shí)踐
更新時(shí)間：2026年03月10日 08:46:12 作者：夜雨微瀾°
本文介紹了如何使用Vue和ElementUI框架創(chuàng)建一個(gè)登錄頁面,并實(shí)現(xiàn)前后端交互,同時(shí),還討論了跨域問題的解決方案以及ES6中的箭頭函數(shù)
一、引入和配置使用ElementUI框架
1.使用vue-cli腳手架工具創(chuàng)建一個(gè)vue項(xiàng)目
vue init webpack 項(xiàng)目名
2.npm安裝elementUI
cd 項(xiàng)目名 #進(jìn)入新建項(xiàng)目的根目錄 npm install element-ui -S #安裝element-ui模塊
3.配置ElementUI
main.js全局配置
配置element-ui,使用elementUI來進(jìn)行布局
// 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，避免后期打包樣式不同，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/>'
})二、Vue+ElementUI設(shè)計(jì)登陸頁面
登錄組件：Login.vue
<template>
<div class="login-wrap">
<el-form class="login-container">
<h1 class="title">用戶登錄</h1>
<el-form-item >
<el-input type="text" placeholder="用戶賬號(hào)" v-model="username" auto-complete="off"></el-input>
</el-form-item>
<el-form-item >
<el-input type="password" placeholder="密碼" v-model="password" auto-complete="off"></el-input>
</el-form-item>
<el-form-item>
<el-button type="primary" @click="doLogin" style="width: 100%;">登錄</el-button>
<el-row style="text-align: center; margin-top: 10px;">
<el-link type="primary" @click="toRegister">用戶注冊(cè)</el-link>
<el-link type="primary">忘記密碼</el-link>
</el-row>
</el-form-item>
</el-form>
</div>
</template>
<script>
export default{
name:'Login',
data:function(){
return{
username:'admin',
password:'123'
}
},
methods:{
doLogin:function(){
},
toRegister:function(){
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>- 使用到Element的表單
- 使用到Element的柵格布局
- 使用到Element的Link 文字鏈接
配置路由：index.js
import Vue from 'vue'
import Router from 'vue-router'
import HelloWorld from '@/components/HelloWorld'
//登錄
import Login from '@/views/Login'
//注冊(cè)
import Register from '@/views/Register'
Vue.use(Router)
export default new Router({
routes: [
{
path: '/HelloWorld',
name: 'HelloWorld',
component: HelloWorld
},{
path: '/',
name: 'Login',
component: Login
},{
path: '/Register',
name: 'Register',
component: Register
}
]
})修改端口號(hào)
config中的index.js
注釋圖片不顯示
App.vue
登錄布局展示
三、前后端交互
1.axios簡(jiǎn)介
axios是vue2提倡使用的輕量版的ajax。它是基于promise的HTTP庫(kù)。它會(huì)從瀏覽器中創(chuàng)建XMLHttpRequests，與Vue配合使用非常好。
2.GET提交
前端Login.vue：
<script>
import axios from 'axios'
import qs from 'qs'
export default{
name:'Register',
data:function(){
return {
username:'admin',
password:'123'
}
},
methods:{
doLogin:function(){
let username=this.username;
let password=this.password;
//定義請(qǐng)求路徑
let url='http://localhost:8080/j2eeVue/userAction.action';
//定義請(qǐng)求參數(shù)
let params={
username:username,
password:password,
methodName:'userLogin'
};
console.log(params);
//發(fā)起ajax請(qǐng)求GET
axios.get(url,{params:params}).then(resp=>{
console.log(resp);
let data=resp.data;
this.$message({
message: data.msg,
type: data.code==1?'success':'error'
});
}).catch(err=>{
console.log(err);
});
},
toRegister:function(){
this.$router.push('/Register');
}
}
}
</script>后端：
public class UserAction extends DispatcherAction implements ModelDriver<User> {
private User user=new User();
private ObjectMapper mapper=new ObjectMapper();
private UserDao userDao=new UserDao();
@Override
public User getModel() {
return user;
}
public String userLogin(HttpServletRequest req,HttpServletResponse resp)
throws ServletException,IOException{
Map<String,Object> json=new HashMap<String,Object>();
User us = userDao.userLogin(user);
if(null!=us) {
json.put("code","1");
json.put("msg", "登錄成功");
}else {
json.put("code", "-1");
json.put("msg", "用戶名或密碼錯(cuò)誤");
}
mapper.writeValue(resp.getOutputStream(),json);
return null;
}
}Dao方法：
public class UserDao extends BaseDao{
/**
* 根據(jù)用戶名密碼查詢對(duì)應(yīng)的用戶對(duì)象信息
* @param user
* @return
*/
public User userLogin(User user) {
String sql="select * from t_user_vue where"
+ " username='"+user.getUsername()+"' and password='"+user.getPassword()+"'";
System.out.println(sql);
@SuppressWarnings("unchecked")
List<User> lst=super.executeQuery(sql, null, new CallBack<User>() {
@Override
public List<User> forEach(ResultSet rs) throws SQLException {
return CommonUtils.toList(rs, User.class);
}
});
if(null!=lst&&lst.size()!=0)
return lst.get(0);
else
return null;
}
}演示：
3.POST提交
import axios from 'axios'
import qs from 'qs'
export default{
name:'Register',
data:function(){
return {
username:'admin',
password:'123'
}
},
methods:{
doLogin:function(){
let username=this.username;
let password=this.password;
//定義請(qǐng)求路徑
let url='http://localhost:8080/j2eeVue/userAction.action';
//定義請(qǐng)求參數(shù)
let params={
username:username,
password:password,
methodName:'userLogin'
};
console.log(params);
//發(fā)起ajax請(qǐng)求POST
//payload:{a:'zs',b:'ls'} -> a=zs&b=ls
//把請(qǐng)求參數(shù)轉(zhuǎn)換格式
let str=qs.stringify(params);
axios.post(url,str).then(resp=>{
let data=resp.data;
this.$message({
message: data.msg,
type: data.code==1?'success':'error'
});
}).catch(err=>{
console.log(err);
});
},
toRegister:function(){
this.$router.push('/Register');
}
}
}
</script>3.axios封裝
如果每個(gè)組件都要用axios那就要一直導(dǎo)入axios,我們不如把它給封裝起來
先寫封裝與全局訪問
action.js：
/**
* 對(duì)后臺(tái)請(qǐng)求的地址的封裝，URL格式如下：
* 模塊名_實(shí)體名_操作
*/
export default {
'SERVER': 'http://localhost:8080/j2eeVue', //服務(wù)器
'SYSTEM_USER_DOLOGIN': '/userAction.action', //登陸
'getFullPath': k => { //獲得請(qǐng)求的完整地址，用于mockjs測(cè)試時(shí)使用
return this.SERVER + this[k];
}
}http.js：
/**
* vue項(xiàng)目對(duì)axios的全局配置
*/
import axios from 'axios'
import qs from 'qs'
//引入action模塊，并添加至axios的類屬性u(píng)rls上
import action from '@/api/action'
axios.urls = action
// axios默認(rèn)配置
axios.defaults.timeout = 10000; // 超時(shí)時(shí)間
// axios.defaults.baseURL = 'http://localhost:8080/j2ee15'; // 默認(rèn)地址
axios.defaults.baseURL = action.SERVER;
//整理數(shù)據(jù)
// 只適用于 POST,PUT,PATCH，transformRequest` 允許在向服務(wù)器發(fā)送前，修改請(qǐng)求數(shù)據(jù)
axios.defaults.transformRequest = function(data) {
data = qs.stringify(data);
return data;
};
// 請(qǐng)求攔截器
axios.interceptors.request.use(function(config) {
return config;
}, function(error) {
return Promise.reject(error);
});
// 響應(yīng)攔截器
axios.interceptors.response.use(function(response) {
return response;
}, function(error) {
return Promise.reject(error);
});
// // 路由請(qǐng)求攔截
// // http request 攔截器
// axios.interceptors.request.use(
// config => {
// //config.data = JSON.stringify(config.data);
// //config.headers['Content-Type'] = 'application/json;charset=UTF-8';
// //config.headers['Token'] = 'abcxyz';
// //判斷是否存在ticket，如果存在的話，則每個(gè)http header都加上ticket
// // if (cookie.get("token")) {
// // //用戶每次操作，都將cookie設(shè)置成2小時(shí)
// // cookie.set("token", cookie.get("token"), 1 / 12)
// // cookie.set("name", cookie.get("name"), 1 / 12)
// // config.headers.token = cookie.get("token");
// // config.headers.name = cookie.get("name");
// // }
// return config;
// },
// error => {
// return Promise.reject(error.response);
// });
// // 路由響應(yīng)攔截
// // http response 攔截器
// axios.interceptors.response.use(
// response => {
// if (response.data.resultCode == "404") {
// console.log("response.data.resultCode是404")
// // 返回 錯(cuò)誤代碼-1 清除ticket信息并跳轉(zhuǎn)到登錄頁面
// // cookie.del("ticket")
// // window.location.
// return
// } else {
// return response;
// }
// },
// error => {
// return Promise.reject(error.response) // 返回接口返回的錯(cuò)誤信息
// });
export default axios;配置全局main.js文件
import axios from '@/api/http' //vue項(xiàng)目對(duì)axios的全局配置 import VueAxios from 'vue-axios' Vue.use(VueAxios,axios)
再實(shí)現(xiàn)登錄方法就不需要再去引入axios和qs
使用后的登錄方法：
<template>
<div class="login-wrap">
<el-form class="login-container">
<h1 class="title">用戶登錄</h1>
<el-form-item>
<el-input type="text" placeholder="用戶賬號(hào)" v-model="username" autocomplete="off"></el-input>
</el-form-item>
<el-form-item>
<el-input type="password" placeholder="用戶密碼" v-model="password" autocomplete="off"></el-input>
</el-form-item>
<el-form-item>
<el-button type="primary" @click="doLogin" style="width: 100%;">提交</el-button>
</el-form-item>
<el-row style="text-align: center;margin-top: -10px;">
<el-link type="primary" @click="toRegister">用戶注冊(cè)</el-link>
<el-link type="primary">找回密碼</el-link>
</el-row>
</el-form>
</div>
</template>
<script>
/* import axios from 'axios'
import qs from 'qs' */
export default{
name:'Register',
data:function(){
return {
username:'admin',
password:'123'
}
},
methods:{
doLogin:function(){
let username=this.username;
let password=this.password;
//定義請(qǐng)求路徑
//let url='http://localhost:8080/j2eeVue/userAction.action';
let url=this.axios.urls.SYSTEM_USER_DOLOGIN;
//定義請(qǐng)求參數(shù)
let params={
username:username,
password:password,
methodName:'userLogin'
};
console.log(params);
//發(fā)起ajax請(qǐng)求GET
this.axios.get(url,{params:params}).then(resp=>{
console.log(resp);
let data=resp.data;
this.$message({
message: data.msg,
type: data.code==1?'success':'error'
});
}).catch(err=>{
console.log(err);
});
//發(fā)起ajax請(qǐng)求POST
//payload:{a:'zs',b:'ls'} -> a=zs&b=ls
/* let str=qs.stringify(params); */
/* this.axios.post(url,params).then(resp=>{
let data=resp.data;
this.$message({
message: data.msg,
type: data.code==1?'success':'error'
});
}).catch(err=>{
console.log(err);
}); */
},
toRegister:function(){
this.$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>
四、Ajax跨域問題
什么是跨域問題?
跨域問題來源于JavaScript的"同源策略"，即只有 協(xié)議+主機(jī)名+端口號(hào) (如存在)相同，則允許相互訪問。也就是說JavaScript只能訪問和操作自己域下的資源，不能訪問和操作其他域下的資源?？缬騿栴}是針對(duì)JS和ajax的，html本身沒有跨域問題。
查看瀏覽器開發(fā)者工具Console報(bào)錯(cuò)：
Failed to load http://a.a.com:8080/A/FromServlet?userName=123: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://b.b.com:8080' is therefore not allowed access.
- http://www.abc.com/a/b 調(diào)用 http://www.abc.com/d/c（非跨域）
- http://www.abc.com/a/b 調(diào)用 http://www.def.com/a/b （跨域：域名不一致）
- http://www.abc.com:8080/a/b 調(diào)用 http://www.abc.com:8081/d/c （跨域：端口不一致）
- http://www.abc.com/a/b 調(diào)用 https://www.abc.com/d/c （跨域：協(xié)議不同）
請(qǐng)注意：localhost和127.0.0.1雖然都指向本機(jī)，但也屬于跨域。
跨域問題解決
web.xml
<!-- Vue之a(chǎn)xios跨域調(diào)用過濾器 -->
<filter>
<filter-name>corsFilter</filter-name>
<filter-class>com.zking.vue.util.CorsFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>corsFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping> CorsFilter.java
package com.zking.vue.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允許跨域訪問
*
* @author Administrator
*
*/
public class CorsFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
throws IOException, ServletException {
HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;
// Access-Control-Allow-Origin就是我們需要設(shè)置的域名
// Access-Control-Allow-Headers跨域允許包含的頭。
// Access-Control-Allow-Methods是允許的請(qǐng)求方式
httpResponse.setHeader("Access-Control-Allow-Origin", "*");// *,任何域名
httpResponse.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
httpResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, DELETE");
filterChain.doFilter(servletRequest, servletResponse);
}
@Override
public void destroy() {
}
}五、POST傳參問題
當(dāng)使用get提交的時(shí)候沒有問題，但是使用post提交后臺(tái)接收不到數(shù)據(jù)，為什么呢？
因?yàn)镻OST提交的參數(shù)的格式是Request Payload，這樣后臺(tái)取不到數(shù)據(jù)的
解決方案：
使用qs.js庫(kù)，將{a:'b',c:'d'}轉(zhuǎn)換成'a=b&c=d'
六、箭頭函數(shù)
ES6標(biāo)準(zhǔn)新增了一種新的函數(shù)：Arrow Function（箭頭函數(shù)）。
1.基本語法
ES6中允許使用箭頭=>來定義箭頭函數(shù)，具體語法，我們來看一個(gè)簡(jiǎn)單的例子：
// 箭頭函數(shù)
let fun = (name) => { // 函數(shù)體 return `Hello ${name} !`; }; // 等同于 let fun = function (name) { // 函數(shù)體 return `Hello ${name} !`; };可以看出，定義箭頭函在數(shù)語法上要比普通函數(shù)簡(jiǎn)潔得多。箭頭函數(shù)省去了function關(guān)鍵字，采用箭頭=>來定義函數(shù)。函數(shù)的參數(shù)放在=>前面的括號(hào)中，函數(shù)體跟在=>后的花括號(hào)中。
關(guān)于箭頭函數(shù)的參數(shù)：
- 如果箭頭函數(shù)沒有參數(shù)，直接寫一個(gè)空括號(hào)即可。
- 如果箭頭函數(shù)的參數(shù)只有一個(gè)，也可以省去包裹參數(shù)的括號(hào)。
- 如果箭頭函數(shù)有多個(gè)參數(shù)，將參數(shù)依次用逗號(hào)(,)分隔，包裹在括號(hào)中即可。
// 沒有參數(shù)
let fun1 = () => { console.log(111); };
// 只有一個(gè)參數(shù)，可以省去參數(shù)括號(hào)
let fun2 = name => { console.log(`Hello ${name} !`) };
// 有多個(gè)參數(shù)
let fun3 = (val1, val2, val3) => { return [val1, val2, val3]; };關(guān)于箭頭函數(shù)的函數(shù)體：
①如果箭頭函數(shù)的函數(shù)體只有一句代碼，就是簡(jiǎn)單返回某個(gè)變量或者返回一個(gè)簡(jiǎn)單的JS表達(dá)式，可以省去函數(shù)體的大括號(hào){ }。
let f = val => val;
// 等同于
let f = function (val) { return val };
let sum = (num1, num2) => num1 + num2;
// 等同于
let sum = function(num1, num2) { return num1 + num2; }; ②如果箭頭函數(shù)的函數(shù)體只有一句代碼，就是返回一個(gè)對(duì)象，可以像下面這樣寫：
// 用小括號(hào)包裹要返回的對(duì)象，不報(bào)錯(cuò)
let getTempItem = id => ({ id: id, name: "Temp" });
// 但絕不能這樣寫，會(huì)報(bào)錯(cuò)。
// 因?yàn)閷?duì)象的大括號(hào)會(huì)被解釋為函數(shù)體的大括號(hào)
let getTempItem = id => { id: id, name: "Temp" };③如果箭頭函數(shù)的函數(shù)體只有一條語句并且不需要返回值（最常見是調(diào)用一個(gè)函數(shù)），可以給這條語句前面加一個(gè)void關(guān)鍵字
let fn = () => void doesNotReturn();
箭頭函數(shù)最常見的用處就是簡(jiǎn)化回調(diào)函數(shù)。
// 例子一
// 正常函數(shù)寫法
[1,2,3].map(function (x) { return x * x; });
// 箭頭函數(shù)寫法
[1,2,3].map(x => x * x);
// 例子二
// 正常函數(shù)寫法
var result = [2, 5, 1, 4, 3].sort(function (a, b) { return a - b; });
// 箭頭函數(shù)寫法
var result = [2, 5, 1, 4, 3].sort((a, b) => a - b);2.特點(diǎn)
- 1. 箭頭函數(shù)使表達(dá)更加簡(jiǎn)潔，隱式返回值
- 2. 沒有自己的this
- 3. 箭頭函數(shù)不能當(dāng)作構(gòu)造函數(shù)使用、不能使用new
- 4. 不能使用argumetns,取而代之用rest參數(shù)...解決
- 5. 箭頭函數(shù)沒有原型對(duì)象
總結(jié)
以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。
相關(guān)文章
vue實(shí)現(xiàn)循環(huán)滾動(dòng)圖片
這篇文章主要為大家詳細(xì)介紹了vue實(shí)現(xiàn)循環(huán)滾動(dòng)圖片，多圖片輪播，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下2022-07-07
name 屬性是可選的,不寫它似乎也“沒問題”,但其實(shí)它在某些場(chǎng)景中非常重要,下面我們來詳細(xì)說明它的作用和典型用法,感興趣的朋友跟隨小編一起看看吧2025-05-05
vue3實(shí)現(xiàn)父組件提交校驗(yàn)多個(gè)子組件
這篇文章主要為大家詳細(xì)介紹了vue3如何實(shí)現(xiàn)父組件在提交事件中校驗(yàn)多個(gè)子組件中的form件,文中的示例代碼講解詳細(xì),有需要的小伙伴可以參考一下2023-11-11
vue3 開始時(shí)間與結(jié)束時(shí)間比較驗(yàn)證(結(jié)束時(shí)間需要大于開始時(shí)間)
本文通過示例代碼介紹了vue3 開始時(shí)間與結(jié)束時(shí)間比較驗(yàn)證(結(jié)束時(shí)間需要大于開始時(shí)間)的相關(guān)操作,代碼簡(jiǎn)單易懂,感興趣的朋友跟隨小編一起看看吧2024-07-07
基于vue和react的spa進(jìn)行按需加載的實(shí)現(xiàn)方法
這篇文章主要介紹了基于vue和react的spa進(jìn)行按需加載,需要的朋友可以參考下2018-09-09
Ant Design的可編輯Tree的實(shí)現(xiàn)操作
這篇文章主要介紹了Ant Design的可編輯Tree的實(shí)現(xiàn)操作，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。一起跟隨小編過來看看吧2020-10-10
VUE路由動(dòng)態(tài)加載實(shí)例代碼講解
在本文里小編給大家整理了關(guān)于VUE路由動(dòng)態(tài)加載實(shí)例代碼以及相關(guān)知識(shí)點(diǎn)，需要的朋友們學(xué)習(xí)下。2019-08-08
Vue對(duì)Element中的el-tag添加@click事件無效的解決
本文主要介紹了Vue對(duì)Element中的el-tag添加@click事件無效的解決，文中通過示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值，需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧2023-05-05
vue觸發(fā)真實(shí)的點(diǎn)擊事件跟用戶行為一致問題
這篇文章主要介紹了vue觸發(fā)真實(shí)的點(diǎn)擊事件跟用戶行為一致問題,具有很好的參考價(jià)值,希望對(duì)大家有所幫助,如有錯(cuò)誤或未考慮完全的地方,望不吝賜教2024-03-03
vue 組件內(nèi)獲取actions的response方式
今天小編就為大家分享一篇vue 組件內(nèi)獲取actions的response方式，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。一起跟隨小編過來看看吧2019-11-11