使用文件系统类的getUserPrincipalLookupService方法获取类的实例

import java.io.IOException;

import java.nio.file.FileSystems;

import java.nio.file.attribute.GroupPrincipal;

import java.nio.file.attribute.UserPrincipal;/**NowJava.com - 时  代  Java**/

import java.nio.file.attribute.UserPrincipalLookupService;


public class Main {

  public static void main(String[] args) {

    try {

      UserPrincipalLookupService lookupService = FileSystems.getDefault()

          .getUserPrincipalLookupService();

      GroupPrincipal groupPrincipal = lookupService

          .lookupPrincipalByGroupName("Administrators");

      UserPrincipal userPrincipal = lookupService/*from n o w  j a v a  . c o m*/

          .lookupPrincipalByName("Richard");