当前位置：首页 > news >正文

vue前端与Java后端进行跨域交互

news 文章来源：https://blog.csdn.net/weixin_42565135/article/details/125741082 2024/11/17 18:48:49

1.后端的几种解决方法

1.在Controller上面加上@CrossOrigin

2.写一个配置文件并且在Controller层加上注解@CORSConfig

package com.wolwo.langyage.base.util;import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
/*** CORS configuration*/
@Configuration
public class CORSConfig {@Beanpublic WebMvcConfigurer corsConfigurer() {return new WebMvcConfigurerAdapter() {@Overridepublic void addCorsMappings(CorsRegistry registry) {registry.addMapping("/**").allowedOrigins("http://127.0.0.1:8080,http://localhost:8080").allowedMethods("POST,GET, OPTIONS,DELETE,PUT").allowedHeaders("Content-Type,ContentType,Access-Control-Allow-Headers,Access-Control-Allow-Origin, Authorization, X-Requested-With").allowCredentials(true);}};}}

3.在springmvc配置文件里加入

4.写一个过滤器类并且在web.xml中注册过滤器

package com.pmsapi.filter;
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.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class CrossingFilter implements Filter {private boolean isCross = false;@Override
public void destroy() {isCross = false;
}@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)throws IOException, ServletException {if (isCross) {HttpServletRequest httpServletRequest = (HttpServletRequest) request;HttpServletResponse httpServletResponse = (HttpServletResponse) response;System.out.println("拦截请求: " + httpServletRequest.getServletPath());httpServletResponse.setHeader("Access-Control-Allow-Origin", "*");// httpServletResponse.setHeader("Access-Control-Allow-Methods", "*"); // 表示所有请求都有效httpServletResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");httpServletResponse.setHeader("Access-Control-Max-Age", "0");httpServletResponse.setHeader("Access-Control-Allow-Headers","Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token");httpServletResponse.setHeader("Access-Control-Allow-Credentials", "true");httpServletResponse.setHeader("XDomainRequestAllowed", "1");}chain.doFilter(request, response);
}@Override
public void init(FilterConfig filterConfig) throws ServletException {String isCrossStr = filterConfig.getInitParameter("IsCross");isCross = isCrossStr.equals("true") ? true : false;System.out.println("跨域开启状态：" + isCrossStr);
}}

<!-- 配置跨域过滤器 -->
<filter><filter-name>CrossingFilter</filter-name><filter-class>com.pmsapi.filter.CrossingFilter</filter-class><init-param><param-name>IsCross</param-name><param-value>true</param-value></init-param>
</filter>
<filter-mapping><filter-name>CrossingFilter</filter-name><url-pattern>/*</url-pattern>
</filter-mapping>

获取前端传来的数据

public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {// 1. 从 map 取 前端发过来的 post 数据
//{username=[xxx],password=[xxx],hobby=[eat,drink]}Map<String, String[]> parameterMap = req.getParameterMap();// 2. 遍历 map 数据 ----> 字符串String namePwd = "";if (parameterMap != null) {for (Map.Entry<String, String[]> entry : parameterMap.entrySet()) {namePwd = entry.getKey();System.out.println(namePwd);}}// 3. 字符串 ----> jsonJSONObject params = JSON.parseObject(namePwd);String username = params.getString("username");int pwd = params.getInteger("pwd");
}

2.前端的处理

查看vue版本npm list vue或是在package.json文件里找”dependencies”直接看到

vue2

原理：给url加上了前缀 /api，我们前端发起请求/dev/unit/queryTree访问https://locall/host:8080/dev/unit/queryTree就当于访问了：https://locall/host:8080/api/dev/unit/queryTree

又因为在 index.js 中的 proxyTable 中拦截了 /api ,并把 /api 及其前面的所有替换成了 target 中的内容，因此实际访问 Url 是https://www.wd.com/dev/unit/queryTree。红色是target,绿色是前端发起的具体请求，对应后端的请求

1.vue.main.js 配置访问的url前缀

import Vue from 'vue'
import ElementUI from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css'
import App from './App'
import axios from 'axios'//引入axios,来发送请求
Vue.config.productionTip = false
Vue.use(ElementUI)
Vue.prototype.axios = axios
axios.defaults.timeout = 5000;// 在超时前，所有请求都会等待 5 秒
axios.defaults.headers.post['Content-Type']='application/x-www-form-urlencoded;charset=UTF-8';// 配置请求头
axios.defaults.baseURL = '/api';// 作用是我们每次发送的请求都会带一个/api的前缀。
axios.defaults.withCredentials = false;
new Vue({el: '#app',components: {App},template: '<App/>'// render: h => h(App)
})

2.修改config文件夹下的index.js文件，在proxyTable中加上如下代码：代理，如果没有这部分，那么跨域的路径就是baseurl+具体请求

'/api':{target: "https://www.wd.com/dev",changeOrigin:true,pathRewrite:{'^/api':''     //因为本身的请求中没有api,所以去掉，eg:前端请求/api/ser,实际后端：https://www.wd.com/dev/ser}
}

3.app.vue

<template><div><el-menu></el-menu><el-table></el-table><br/><el-page></el-page></div>
</template>
<script>
import nav from "./components/NavMenu.vue"
import eletable from "./components/Table.vue"
import pageination from "./components/Pagination.vue"
export default {components:{ElMenu:nav,ElTable:eletable,ElPage:pageination},data(){return{}},methods:{},mounted() {this.axios({method: 'get',url: '/test/test',params: this.urlParams}).then((res) => {console.log(res)console.log(res.data)alert(res.data.msg)}).catch((err) => {console.log(err)})}
}
</script>

vue3

在config.js中这样写
devServer: {open: true, //是否自动弹出浏览器页面host: "localhost",port: '8080',https: false,hotOnly: false,proxy: //或者直接写上协议 域名 端口号，在请求的时候加上请求和这个拼接上
{'/api': {target: 'https://www.v2ex.com/api', //API服务器的地址changeOrigin: true,pathRewrite: {'^/api': ''}}},
}

3.vue+webpack项目搭建实现前后端交互

1.检查本地环境

node -v
npm -v
vue -V

`2.进入目录文件夹创建项目`

vue init webpack vue-project-name

3.安装依赖

npm操作：与cnpm yarn的区别是他们下载源不同，npm会更满=慢些
安装vue-router：
npm install vue-router --save-dev dev表示生产环境，开发环境不加dev
安装element-ui：与路由相关的元素上需要加上router，在vue文件中的element元素上，如果表单中某个元素的值是变量，需加上：，比如：key="i"
npm i element-ui -S -S表示plus的意思，不加plus的只支持vue2.几版本，vue3使用plus的
安装SAss加载器：
npm install sass-loader node-sass --save-dev
安装axios：
npm install --save axios vue-axios
注意安装依赖之后要重新执行nmp install

4.启动浏览器进行访问

npm run dev是适用于老版本；新版本使用npm run server

完成后，可在生成的项目中修改基础配置，比如运行监听端口，默认是8080，如果担心有冲突可自行更改，更改文件在config—index.js 。项目基础信息在package.json文件中，有项目名称、作者、运行说明等，可自行查阅，启动项目命令：npm run dev启动完成后回返回请求的地址，复制到浏览器即可请求项目。

5.实现登录

http是无状态的通过cookie在客户端记录状态通过session在服务器端记录状态通过token方式维持状态
将登录之后的token，保存到客户端的sessionStorage中.项目中除了登录之外的其他API接口，必须在登录之后才能访问;token只应在当前网站打开期间生效，所以将token保存在sessionStorage中

2.Element-UI组件实现布局

el-form
el-form-item
el-input
el-button
字体图标

3.Login.vue

<template><div class="login-wrap"><el-form class="login-container"><h1 class="title">用户登录</h1><el-form-item label="账号"><el-input type="password" v-model="uname" placeholder="登录账号" autocomplete="off"></el-input></el-form-item><el-form-item label="登录密码"><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()">登录</el-button></el-form-item></el-form></div>
</template><script>export default {name: 'login',data: function() {return {uname: "张三",password: "123"}},methods: {dosubmit: function() {let params = {uname: this.uname,password: this.password};}}}
</script><!-- Add "scoped" attribute to limit CSS to this component only -->
<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>

4.配置路由

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

5.跨域请求

get:

<script>
import axios from 'axios'
import qs from 'qs'export default {name: 'login',data: function() {return {uname: "张三",password: "123"}},methods: {dosubmit: function() {let params = {uname: this.uname,password: this.password};var url = "http://localhost:8080/ssm02/login";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);});var str=qs.stringify(params);axios.post(url,str//注意数据是直接保存到json对象).then(function(response) {console.log(response);}).catch(function(error) {console.log(error);});}}}
</script>

post

var str=qs.stringify(params);axios.post(url,str//注意数据是直接保存到json对象).then(function(response) {console.log(response);}).catch(function(error) {console.log(error);});因为POST提交的参数的格式是Request Payload，这样后台取不到数据的(详情见资料“05 Vue中axios踩坑之路-POST传参 - RainSun - CSDN博客.mht”)，解决方案：使用qs.js库，将{a:'b',c:'d'}转换成'a=b&c=d'