String数组转List，List转String数组

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List<String> list = new ArrayList<String>();
list.add("a1");
list.add("a2");
String[] toBeStored = list.toArray(new String[list.size()]);
for(String s : toBeStored) {
     System.out.println(s);
}

List 转换为 String数组

String[] arr = new String[] {"1", "2"};
List list = Arrays.asList(arr);

String 数组转换为 List

参见：
Collection.toArray()

http://blog.csdn.net/aaronuu/article/details/7055650