localStorage里的样子

解决思路就是：
先 localStorage.getItem(“userInfo”);
然后 JSON.parse(user)转换成对象

		let user = localStorage.getItem("userInfo");
        user = JSON.parse(user)
        this.form.applyName = user.nickname;
        this.form.mgAd = user.username;
        this.form.departmentId = user.departmentId;
        this.form.roles = localStorage.getItem("roles");

参考：
https://blog.csdn.net/Seven71111/article/details/107696976