html本地存储 localStorge

    setLocalStorage:function(key,val){
        var exp=new Date().getTime()+2*24*60*60*100;  //令牌过期时间
        var obj={
            val:val,
            exp:exp
        };
        localStorage.setItem(key,JSON.stringify(obj));
    },

    getLocalStorage:function(key){
        var info= localStorage.getItem(key);
        if(info) {
            info = JSON.parse(info);
            if (info.exp > new Date().getTime()) {
                return info.val;
            }
            else{
                this.deleteLocalStorage('token');
            }
        }
        return '';
    },

    deleteLocalStorage:function(key){
        return localStorage.removeItem(key);
    },