List集合与数组相互转化 : 以String类型为例

String[]转List

String[] arr = new String[]{“s1”,“s2”,“s3”};
List list = Arrays.asList(arr);

List转String[]

List list = new ArrayList();
list.add(“s1”);
list.add(“s2”);
list.add(“s3”);
String[] arr = list.toArray(new String[list.size()])