JAVA stream()匹配十八位身份证

filter()方法使用

String regex = "^([1-6][1-9]|50)\d{4}(18|19|20)\d{2}((0[1-9])|10|11|12)(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$";
Pattern pattern=Pattern.compile(regex);

List userList = list.stream().filter(m -> pattern.matcher(m.getSfzh()).matches())
                    .collect(Collectors.toList());

map()方法使用

 List userList = list.stream().map(m -> {
      System.out.println(pattern.matcher(m.getSfzh()).matches());
      if (pattern.matcher(m.getSfzh()).matches()){
           return m;
      }
      return null;
 }).filter(Objects::nonNull).collect(Collectors.toList());