字符串转数组

字符串根据 逗号分隔 转数组

String str = "1,2,3,4,5,6,7";
List strList = Arrays.asList(str.splic(",")); 

输出：

将字符串转为Long型数组

List list = Arrays.stream(str.split(",")).map(s -> Long.parseLong(s.trim())).collect(toList());