Java 将字符串集合转换成逗号分隔的列表，java逗号,private Stri

Java 将字符串集合转换成逗号分隔的列表，java逗号,private Stri

private String convertToCommaSeparatedList(Collection<String> items){  StringBuilder output = new StringBuilder();  for (String item:items)  {    output.append(item + ",");  }  // Remove leading comma, if the list is not empty.  if (output.length() != 0)  {    output.deleteCharAt(output.length() - 1);  }  return output.toString();}