java中逗号分隔的字符串和List相互转换

1、将逗号分隔的字符串转换为List

String str = “a,b,c”;

List result = Arrays.asList(str.split(“,”));

2、将List转换为逗号分隔的字符串

(1)利用Guava的Joiner

List list = new ArrayList();
list.add(“a”);
list.add(“b”);
list.add(“c”);

String str = Joiner.on(“,”).join(list);

(2)利用Apache Commons的StringUtils

List list = new ArrayList();
list.add(“a”);
list.add(“b”);
list.add(“c”);

String str = StringUtils.join(list.toArray(), “,”);