String和List间的相互转换

    public void test() {
        //字符串转list
        String str = "asdfghjkl";
        List lis = Arrays.asList(str.split(""));
        for (String string : lis) {
            System.out.println(string);
        }
        //list转字符串
        System.out.println(String.join("", lis));
    }