VUE使用localstorage和sessionstorage实现登录示例详解

sessionStorage.setItem("key", "value");    
localStorage.setItem("aaa", "111");
localStorage.name = "xuanyuan"

var value = sessionStorage.getItem("key");    
var site = localStorage.getItem("asd");

sessionStorage.removeItem("key");    
localStorage.removeItem("asd");

sessionStorage.clear();    
localStorage.clear();

var storage = window.localStorage;
storage.key1 = "hello";
storage["key2"] = "world";
console.log(storage.key1);
console.log(storage["key2"]);

var storage = window.localStorage;
for(var i=0, len=storage.length; i<len;i++){
    var key = storage.key(i);    
    var value = storage.getItem(key);    
    console.log(key + "=" + value);
}

<template>
  <div class="bigdiv">
    <div class="twodiv">
      <div >
        <p><h2>登录</h2></p>
      </div>
      <div>
        <Input v-model="username" placeholder="账号" style="width: 300px"></Input>
        <Input v-model="passWord" placeholder="密码" style="width: 300px" type="password"></Input>
      </div> 
      <div>
        <Button type="info" @click="executelogin()" class="but">登录</Button>
      </div>
    </div>
  </div>
</template>
<script>
// 引入axiOS组件
import axios from "axios";
import qs from "qs"; //处理数据  qs.stringify(params)
import {checkRule} from '@/assets/js/public';//引入公共js文件
export default {
  data(){
    return{
      username:'',
      password:''
    }
  },
  methods: {
    
executelogin() {
// 判断浏览器是否支持localstroage
if(!window.localStorage){
this.$Message.error(‘您的浏览器不支持localstorage');
          return false;
       }
      const self = this;//将this对象附到一个不可更改的变量中~
      axios({
          method: "post",
          url: "你的url",
          data: {username: this.username,password:this.password}
      })
      .then(function(response) {
          checkRule(response,self);//检查是否有权限
          if(response.data.status == 1){
         // 所有的浏览器中都会把localStorage的值类型限定为string类型，这个在对我们日常比较常见的JSON对象类型需要一些转换
            // 先存localStorage，再提示操作成功，然后跳路由
            // JSON.stringify:将对象转成字符串
            // JSON.parse():将字符串装换成对象
            let toll = JSON.stringify(response.data.toll);//将当前信息变成json字符串
            localStorage.toll = toll;//存储用户信息
            let nowtime = new Date().getTime();
            localStorage.logintime = nowtime;//存储登陆时间，判断登录是否过期
            self.$Message.success('登陆成功');
            self.$router.push({ 
                path:'/',    //这是路由名称     
            })
          }else{
            alert("用户名或密码错误");
          }
      })
      .catch(function(response) {
          // alert("请求失败");
      });
    },
  }
}
</script>

// 全局路由守卫
router.beforeEach((to, from, next) => {//在路由跳转之前做的事
  var userinfo = '';
  // 这个是使用localstronge存储方式存储的方法
  let nowtime = new Date().getTime();//获取当前时间戳  毫秒
  let sessiontime = nowtime - localStorage.logintime//当前时间  -  登录时间
  console.log(sessiontime)
  // 数据保存时间只有5个小时，超过5个小时，清除
  if (sessiontime > 18000000){
    localStorage.clear();
  }
  // 这是取值
  let userinfo = localStorage.userinfo;
}