通讯录管理：增加删除联系人，修改联系人数据； 通讯录查询:可以实现按姓名和电话号码分别查询 用户管理：密码修改，增加删除用户。 -Address Book Management: Add delete contacts, edit contact data Book Search: you can achieve by name and phone number were inquiries user management: the password modify, add del