后台管理系统-------登录功能@zj-zhangjie

后台管理系统-------登录功能实现（element-ui）

登录页面代码（login）:

<template>
  <div class="login">
    <el-form
      :model="userinfo"
      :rules="loginRules"
      label-position="right"
      class="el_box"
      label-width="60px"
    >
      <el-form-item label="账号:" class="el_username" prop="username">
        <el-input v-model="userinfo.username"></el-input>
      </el-form-item>
      <el-form-item label="密码:" class="el_password" prop="username">
        <el-input type="password" v-model="userinfo.password"></el-input>
      </el-form-item>
      <el-button type="primary" class="el_login" @click.prevent="login">登录</el-button>
    </el-form>
  </div>
</template>

<script>
//引入封装好的api登录接口
import { login } from "../http/api";
export default {
  name: "login",
  data() {
    return {
      userinfo: {
        username: "",
        password: ""
      },
      loginRules: {
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          { min: 5, max: 10, message: "长度在 5 到 10 个字符", trigger: "blur" }
        ],
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          { min: 5, max: 10, message: "长度在 5 到 10 个字符", trigger: "blur" }
        ]
      }
    };
  },
  methods: {
    //   登录
    async login() {
      const res = await login(this.userinfo);
      //   console.log(res);
      //   结构赋值
      const {
        meta: { msg, status }
      } = res.data;
      //   判断code值
      if (status === 200) {
        //   结构赋值token
        const { token } = res.data.data;
        // 本地存储token
        localStorage.setItem("token", token);
        //赋值redirect表示的是被路由拦截拦下来的页面
        const { redirect } = this.$route.query;
        //如果直接登录，没有redirect,成功后直接跳转到home
        if (!redirect) {
          this.$router.push({ name: "Home" });
        } else {
          this.$router.push({ path: redirect });
        }
        // 成功提示
        this.$message({
          message: msg,
          type: "success"
        });
      } else {
        //   失败提示
        this.$message({
          message: msg,
          type: "error"
        });
      }
    }
  }
};
</script>

<style lang="scss" scoped>
.login {
  width: 100%;
  height: 836px;
  background: #2a4c6b;
  .el_box {
    background: white;
    position: absolute;
    top: 30%;
    left: 40%;
    text-align: center;
    width: 400px;
    height: 300px;
    border-radius: 5px;
    margin: 0 auto;
    .el_username {
      margin-top: 70px;
      width: 80%;
      margin-left: 25px;
    }
    .el_password {
      margin-top: 20px;
      width: 80%;
      margin-left: 25px;
    }
    .el_login {
      width: 30%;
      margin-top: 20px;
    }
  }
}
</style>

api接口封装：(两个文件 request.js和api.js文件)

request.js: 设置axios拦截

import axios from "axios"

const service = axios.create({
    baseURL: "https://www.liulongbin.top:8888/api/private/v1",
    timeout: 3000
})


// 请求拦截
axios.interceptors.request.use(function (config) {
    return config;
}, function (error) {
    return Promise.reject(error)
})

// 响应拦截
axios.interceptors.response.use(function (response) {
    return response;
}, function (error) {
    return Promise.reject(error)
});
export default service;

api.js： 项目中的业务接口

import request from "./request"

// 登录接口
export function login(data){
    console.log(data)
    return request({
        url:"/login",
        method:"POST",
        data
    })
}

在main.js里面设置全局路由守卫：

import Vue from "vue";
import App from "./App.vue";
import router from "./router";
import store from "./store";
import ElementUI from 'element-ui';
import axios from "axios";
import 'element-ui/lib/theme-chalk/index.css';
Vue.use(ElementUI);
Vue.config.productionTip = false;
Vue.prototype.axios = axios;

// 全局路由守卫
router.beforeEach((to, from, next) => {
  // console.log("from:", from);
  // console.log("to:", to);
  if (to.meta.auth) {
    // 本地获取token
    const token = localStorage.getItem('token')
    // 判断token是否存在
    if (!token) {
      next({
        name: 'Login',
        // 返回上次跳转的路由
        query: { redirect: to.fullPath }
      })
    } else {
      next()
    }
  } else {
    next();
  }

});



new Vue({
  router,
  store,
  render: h => h(App)
}).$mount("#app");

router 路由配置：

import Vue from "vue";
import VueRouter from "vue-router";
import Home from "../views/Home.vue";
import Login from "../views/Login.vue"

Vue.use(VueRouter);

const routes = [
  {
    path: "/",
    name: "Login",
    component: Login
  },
  {
    path: "/home",
    name: "Home",
    meta:{
      auth:true
    },
    component: Home
  }

];

const router = new VueRouter({
  routes
});

export default router;

登录的基本逻辑操作就是这样了