Three of the most common methods for retrieving header information sent from a server are shown in Listing 8.

清单8显示了三种最常用的、提取来自服务器的头信息的方法。

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The CustomerService bean is a utility class that implements methods to access the database for adding, updating, removing, and retrieving customer information.

CustomerService bean是个工具类，它实现了访问数据库以增加、更新、删除和查询用户信息的方法。

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Finally, based of the study of theory and methods, a system that retrieving the information and mining knowledge from agriculture product price has already developed.

最后，在上述理论方法研究的基础上，研究开发了农产品市场行情信息的提取与知识发现系统。

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