JDK1.8新特性Lambda表达式总结

字符串转list集合

List menuList = Arrays.stream(StringUtils.split(menuId, Constants.SPLIT_1)) .map(id -> Long.parseLong(id.trim())) .collect(Collectors.toList());

list转string

string string2 = menuIds.stream().collect(Collectors.joining("-")); String idsString = StringUtils.join(idsList, ","); StringUtils.strip(idsList.toString(),"[]");