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public static void main(String[] args) {
List<String> list = new ArrayList<String>();
list.add("测试1");
list.add("测试2");
list.add("测试3");
//list转string
String ss = String.join(",", list);
System.out.println(ss);
//String转list
String str[] = ss.split(",");
List<String> slit = Arrays.asList(str);
for (int i = 0; i < slit.size(); i++) {
System.out.println(slit.get(i));
}
}