一. elementUI的使用

1. 使用vue-cli构建SPA项目

1. 使用命令vue init webpack 项目名，构建一个vue项目
   

2. 下载elementUI到当前项目中并加入到后续打包中

   npm install element-ui -s
   

   

3. 在main.js中引用elementUI
   引用ElemenUI依赖和css样式
   为了避免后期打包样式不同,要放在组件(App等)引用之前

   import ElementUI from 'element-ui'
   import 'element-ui/lib/theme-chalk/index.css'
   

   vue使用elementUI

   Vue.use(ElementUI)   
   Vue.config.productionTip = false
   

4. 验证
   进入elementUI官方文档,找到一个组件放入到App.vue查看效果

   <div id="app">
     <el-row>
       <el-button>默认按钮</el-button>
       <el-button type="primary">主要按钮</el-button>
       <el-button type="success">成功按钮</el-button>
       <el-button type="info">信息按钮</el-button>
       <el-button type="warning">警告按钮</el-button>
       <el-button type="danger">危险按钮</el-button>
     </el-row>
   </div>
   

   

注: npm install -g/-s/-d
-g: 将js依赖下载到node_globa
-s: 将js依赖下载到当前的SPA项目中,并且在后续的前端项目打包时,npm build会一并打包到项目中
-d: 将js依赖下载到当前的SPA项目中,但是在后续的前端项目打包时,npm build不会一并打包到项目中

2. 登录静态页实现

1. 在src目录下新建views文件夹,用于存放组件,原来的components用来存储公共的组件

2. 创建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>
   

3. App.vue 的css

   <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>
   

4. Login.vue 的css

   <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>
   

5. 在router/index.js中修改vue项目默认显示路由

   export default new Router({
         
     routes: [{
         
         path: '/',
         name: 'Login',
         component: Login
       }
     ]
   })
   

6. 在config/index.js目录下修改端口并启动
   

二. axios前后端交互

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。

npm i axios -S

2. 实现

1. 引入依赖

import axios from 'axios';

<script>
import axios from 'axios';
export default {
      
  name: 'Login',
  data () {
      
    return {
      
      username: null,
      password: null
    }
  },
  methods: {
      
    doSubmit: function() {
      
      let params = {
      
        username: this.username,
        password: this.password
      }
      console.log(params);
      var url = "http://localhost:8080/ssm/user/userLogin";

      axios.get(url, {
       //注意数据是保存到json对象的params属性
        params: params
      }).then(function(response) {
      
        console.log(response);
      }).catch(function(error) {
      
        console.log(error);
      });
    }
  }
}
</script>

三. axios的get请求和post请求的区别及优化

1. get请求

axios.get(url, {
     //注意数据是保存到json对象的params属性
 params: params
}).then(function(response) {
    
  console.log(response);
}).catch(function(error) {
    
  console.log(error);
});

2. post请求

axios.post(url, params).then(function(response) {
    
  console.log(response);
}).catch(function(error) {
    
  console.log(error);
});

后台不能处理请求

post请求传到后台的是一个对象,并不能以键值对接收(username=“zs”&password=“123”)

如果要使用post请求需要下载qs.js

npm i qs -S

引用qs

import axios from 'qs';

发送post请求

axios.post(url, qs.stringify(params)).then(function(response) {
    
 console.log(response);
}).catch(function(error) {
    
  console.log(error);
});

3. 优化

下载vue-axios

npm i vue-axios -S

在src目录下新加api文件夹
api下新建action.js和http.js
在main.js引入api模块和vue-axios模块

import axios from '@/api/http'                 
import VueAxios from 'vue-axios' 

Vue.use(VueAxios,axios)

这样不用每个组件都需要引用js,和方便管理请求地址

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);
});

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
 */
/**
 * 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
	'SYSTEM_USER_DOLOGIN': '/user/userLogin', //登陆
	'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);
});

// // 路由请求拦截
// // http request 拦截器
// axios.interceptors.request.use(
// 	config => {
    
// 		//config.data = JSON.stringify(config.data);  
// 		//config.headers['Content-Type'] = 'application/json;charset=UTF-8';
// 		//config.headers['Token'] = 'abcxyz';
// 		//判断是否存在ticket，如果存在的话，则每个http header都加上ticket
// 		// if (cookie.get("token")) {
    
// 		// 	//用户每次操作，都将cookie设置成2小时
// 		// 	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);
// 	});

// // 路由响应拦截
// // http response 拦截器
// axios.interceptors.response.use(
// 	response => {
    
// 		if (response.data.resultCode == "404") {
    
// 			console.log("response.data.resultCode是404")
// 			// 返回 错误代码-1 清除ticket信息并跳转到登录页面
// 			//      cookie.del("ticket")
// 			//      window.location.href='http://login.com'
// 			return
// 		} else {
    
// 			return response;
// 		}
// 	},
// 	error => {
    
// 		return Promise.reject(error.response) // 返回接口返回的错误信息
// 	});



export default axios;

四. 跨域现象及解决方案

1. 现象

跨域是指在 Web 应用中，一个网站或应用访问另一个网站或应用所在的域之外的资源
跨域错误

协议, ip(host), port(端口), 项目
http://localhost:8080/ssm…
https://localhost:8080/ssm…
http://127.0.0.2:8080/ssm…
http://127.0.0.1:8081/ssm…
http://127.0.0.1:8080/spboot…
以上任何一项不同都会产生跨域现象

2. 解决方案

在过滤器中进行配置, 允许指定的外部进行内部资源访问

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 {
    

	@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);
	}

	@Override
	public void destroy() {
    

	}
}