stringjoiner可以添加整数嘛（StringUtils.join方法）

join

public static String join(Object[]array)

Joins the elements of the provided array into a single String

containing the provided list of elements.

No separator is added to the joined String.

Null objects or empty strings within the array are represented by

empty strings. StringUtils.join(null) = null StringUtils.join([]) = "" StringUtils.join([null]) = "" StringUtils.join(["a", "b", "c"]) = "abc" StringUtils.join([null, "", "a"]) = "a"