网站建设客源开发,2023全民核酸又开始了,精品网站建设费用 都来磐石网络,网站建设中的数据库规划一#xff0c;ElementUI是什么#xff1f; Element UI 是一个基于 Vue.js 的桌面端组件库#xff0c;它提供了一套丰富的 UI 组件#xff0c;用于构建用户界面。Element UI 的目标是提供简洁、易用、美观的组件#xff0c;同时保持灵活性和可定制性 二#xff0c;Element…一ElementUI是什么 Element UI 是一个基于 Vue.js 的桌面端组件库它提供了一套丰富的 UI 组件用于构建用户界面。Element UI 的目标是提供简洁、易用、美观的组件同时保持灵活性和可定制性 二ElementUI的特点与功能(大致五点) Element UI 的特点和功能包括 丰富的组件 Element UI 提供了大量的常用组件包括按钮、表单、表格、对话框、菜单等等。这些组件经过精心设计具有统一的风格和交互体验在构建用户界面时非常方便。 响应式布局 Element UI 的组件可以自动适应不同屏幕尺寸支持响应式布局使得应用程序在不同设备上都有良好的显示效果。 简洁易用 Element UI 的组件设计简洁提供了丰富的配置选项开发者可以通过参数的方式灵活地定制组件的外观和行为。 主题定制 Element UI 提供了一套默认的主题样式但也支持自定义主题。你可以根据项目的需求定制自己的主题样式以使应用程序更符合项目的整体风格 国际化支持 Element UI 内置了多语言支持可以方便地实现多语言应用程序 二Element搭建登入注册前期准备 ①搭建SPA项目 没有搭建SPA项目---》》点击进入SPA项目搭建流程 ②导入Element依赖 使用命令npm install element-ui -S添加Element-UI模块 注意要在你的SPA项目工作区间下使用cmd终端命令下载如下 下载完毕之后在你的SPA项目下的package.json文件中会看见下载所需要的Element依赖 三Element实现登入注册界面 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 在项目中src目录下找到main.js并在指定位置添加三行代码 注意要在import App from ./App这行代码前面添加下面三行代码 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 Vue.jsx挂载Element代码也是在main.js文件下添加即可:
Vue.use(ElementUI)
Vue.config.productionTip false 第三步①创建用户登录组件Login.vue templatediv classlogin-wrapel-form classlogin-containerh1 classtitle用户登录/h1el-form-item labelel-input typetext v-modelusername placeholder登录账号 autocompleteoff/el-input/el-form-itemel-form-item labelel-input typepassword v-modelpassword placeholder登录密码 autocompleteoff/el-input/el-form-itemel-form-itemel-button typeprimary stylewidth:100%; clickdoSubmit()提交/el-button/el-form-itemel-row styletext-align: center;margin-top:-10pxel-link typeprimary忘记密码/el-linkel-link typeprimary clickgotoRegister()用户注册/el-link/el-row/el-form/div
/template 为了样式更加好看导入App.vue中的样式 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 login.vue与Register.vue样式 style scoped.login-wrap {box-sizing: border-box;width: 100%;height: 100%;padding-top: 10%;background-image: 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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 效果图 index.js中设置绑定路由数据关系 import Vue from vue
import Router from vue-router
import HelloWorld from /components/HelloWorld
import Login from /views/Login
import Register from /views/RegisterVue.use(Router)export default new Router({routes: [{path: /,name: Login,component: Login},{path: /Register,name: Register,component: Register}]
}) 效果 四数据交互
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。
4.1 了解axios与安装 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-routervuex 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 安装语法 npm i axios -S 默认为post请求 如果数据交互需要get请求要下载有关get请求的的依赖 get语法 npm i qs -S 注意要在你的SPA项目工作区间启动cmd窗口执行该行代码如下 4.2 axios之Post请求 1 在前端导入刚下载好的axios依赖 import axios from axios 前端编写 script
import axios from axios
export default {name: Login,data () {return {username:,password:}} ,methods:{gotoRegister(){this.$router.push(/Register); },doSubmit(){let url localhost:8080/ssm/user/userLogin;let params {username:this.username,password:this.password}axios.get(url,{params:params}).then(r{console.log(r);if(r.data.success){this.$message({message:r.data.msg,type:success});}else{this.$message.error(r.data.msg); }}).catch(e{})}}
}
/script 接下来将前端中index.js下的修改SPA项目的端口号以防万一与后端端口号一致 在我们的后端项目中有一个视图解析器来处理我们前端发过来的请求进行处理 userController: package com.zking.ssm.controller;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
// MapString,Object jsonnew HashMapString,Object();
// json.put(username, userVo.getUsername());//生成JWT并设置到response响应头中
// String jwtJwtUtils.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(/queryUserPager)ResponseBodypublic JsonResponseBodyListMapString,ObjectqueryUserPager(UserVo userVo, HttpServletRequest request){try {PageBean pageBeannew PageBean();pageBean.setRequest(request);ListMapString, 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);}}
}在前端项目工作区间下文件路径输入cmd打开cmd窗口。 输入命令开启项目 : npm run dev 并且在后端启动maven项目可以进行访问才可 4.3 axios之Get请求 导入依赖 import qs from qs templatediv classlogin-wrapel-form classlogin-containerh1 classtitle用户登录/h1el-form-item labelel-input typetext v-modelusername placeholder登录账号 autocompleteoff/el-input/el-form-itemel-form-item labelel-input typepassword v-modelpassword placeholder登录密码 autocompleteoff/el-input/el-form-itemel-form-itemel-button typeprimary stylewidth:100%; clickdoSubmit()提交/el-button/el-form-itemel-row styletext-align: center;margin-top:-10pxel-link typeprimary忘记密码/el-linkel-link typeprimary clickgotoRegister()用户注册/el-link/el-row/el-form/div
/templatescript
import axios from axiosimport qs from qs //用于post请求
export default {name: Login,data () {return {username:,password:}} ,methods:{gotoRegister(){this.$router.push(/Register); },doSubmit(){let params {username: this.username,password: this.password};console.log(params);//定义后端都请求地址var url this.axios.urls.SYSTEM_USER_DOLOGIN;// let url localhost:8080/ssm/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.$message({// message:r.data.msg,// type:success// });// }else{// this.$message.error(r.data.msg); // }// }).catch(e{// })}}
}
/script
style scoped.login-wrap {box-sizing: border-box;width: 100%;height: 100%;padding-top: 10%;background-image: 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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 导入api文件(两个) 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/ssm, //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];}
}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,PATCHtransformRequest 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;charsetUTF-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.hrefhttp://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;需要在mian.js中配置两个js文件 main.js: import axios from /api/http
import VueAxios from vue-axios
Vue.use(VueAxios,axios)五注册功能实现 ①自行创建一个注册页面 ②定义接口、接口实现类 接口类 int insertSelective(User record); 实现接口类 Overridepublic int insertSelective(User record) {return userMapper.insertSelective(record);} ③ Controller层编写 RequestMapping(/userRegister)ResponseBodypublic JsonResponseBody? userRegister(UserVo userVo, HttpServletResponse response) {//状态新注册默认为0userVo.setStatus(0);//因为ID为String类型需要手动设置当然可以根据自己的需要改为Int类型userVo.setId(9);int i userService.insertSelective(userVo);if (i 0) {return new JsonResponseBody(用户注册完成快去登入吧, true, 0, null);} else {return new JsonResponseBody(用户注册失败重新输入。, false, 0, null);}} 五跨域问题
5.1 概念 跨域问题Cross-Origin Resource SharingCORS指的是在浏览器端由于安全策略限制不同源域/协议/端口之间的网页或者Ajax请求无法直接进行交互或访问对方的资源。同源策略是浏览器的一种安全机制用于保护用户信息和防止恶意攻击。 同源策略要求网页只能与相同源的资源进行交互源Origin由协议、域名和端口号组成。当源不一致时浏览器会阻止跨域的请求。例如一个网页在域A中运行试图通过JavaScript向域B发送AJAX请求此时就会触发跨域问题 5.2 解决跨域问题
web.xml: !--CrosFilter跨域过滤器--filterfilter-namecorsFilter/filter-namefilter-classcom.zking.ssm.util.CorsFilter2/filter-class/filterfilter-mappingfilter-namecorsFilter/filter-nameurl-pattern/*/url-pattern/filter-mapping
跨域工具类: CorsFilter2 过滤器 这段代码的作用是配置Tomcat服务器允许来自任何域名的跨域访问并允许客户端发送包含指定请求头的请求以及指定允许的请求方法 package com.zking.ssm.controller;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() {}
}
