String[]与List<String>的相互转换

String[]转List<String>

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

List<String>转String[]

List<String> list = new ArrayList<String>();
list.add("s1");
list.add("s2");
list.add("s3");
String[] arr = list.toArray(new String[list.size()]);