public class ArraySplicing {private static String[] array = {"张三", "李四", "王五", "撒娇", "九点十几分", "没事", "圣诞节"};private static String str;public static void main(String[] args) {List<String> list = new ArrayList<>();for (int i = 0; i < array.length; i++) {list.add(array[i]);}/**** 将集合用字符串，逗号隔开拼接* *///第一种方法(灵活，可以用逗号隔开，用|线隔开)str = StringUtils.join(list, ",");System.out.println("第一种方法" + str);//第二种方法str = listToString1(list);System.out.println("第二种方法" + str);//第三种方法(灵活，可以用逗号隔开，用|线隔开)str = listToString2(list, ',');System.out.println("第三种方法" + str);//第四种方法str = listToString3(list, ",");System.out.println("第四种方法" + str);Separator separator=new Separator(",");//第五种方法str = listToString4(list, separator );System.out.println("第五种方法"+str);}public static String listToString1(List<String> list) {StringBuilder sb = new StringBuilder();if (list != null && list.size() > 0) {for (int i = 0; i < list.size(); i++) {if (i < list.size() - 1) {sb.append(list.get(i) + ",");} else {sb.append(list.get(i));}}}return sb.toString();}public static String listToString2(List list, char separator) {StringBuilder sb = new StringBuilder();for (int i = 0; i < list.size(); i++) {sb.append(list.get(i)).append(separator);}return list.isEmpty() ? "" : sb.toString().substring(0, sb.toString().length() - 1);}public static String listToString3(List list, String separator) {StringBuilder sb = new StringBuilder();for (int i = 0; i < list.size(); i++) {sb.append(list.get(i));if (i < list.size() - 1) {sb.append(separator);}}return sb.toString();}public static class Separator {private String next = "";private String separator;public Separator(String separator) {this.separator = separator;}public String get() {String result = next;next = separator;return result;}}public static String listToString4(List<String> list, Separator separator) {StringBuilder sb = new StringBuilder();for (String s : list) {if (s != null && !"".equals(s)) {sb.append(separator.get()).append(s);}}return sb.toString();}
