逗号分隔的字符串与List互转

// 将逗号分隔的字符串转换为List
String str = "a,b,c";
// 1.使用JDK,逗号分隔的字符串-->数组-->list
List<String> result = Arrays.asList(str.split(","));
// 2.使用Apache Commons的StringUtils
List<String> result1 = Arrays.asList(StringUtils.split(str, ","));
// 3.通过遍历
String[] strings = str.split(",");
List<String> result2 = new ArrayList<String>();
for (String string : strings) {
    result2.add(string);
}

// 将List转换为逗号分隔的字符串
List<String> list = new ArrayList<String>();
list.add("a");
list.add("b");
list.add("c");
// 1.使用Apache Commons的StringUtils
String str1 = StringUtils.join(list.toArray(), ",");
// 2.通过遍历
StringBuffer str2 = new StringBuffer();
for (Iterator<String> iterator = list.iterator(); iterator.hasNext();) {
    String string = (String) iterator.next();
    str2.append(string);
    if(iterator.hasNext()){
        str2.append(","); 
    }
}