package javax.servlet.http; import java.io.Serializable; import java.security.AccessController; import java.security.PrivilegedAction; import java.text.MessageFormat; import java.util.BitSet; import java.util.Locale; import java.util.ResourceBundle; /** * Creates a cookie, a small amount of information sent by a servlet to a Web * browser, saved by the browser, and later sent back to the server. * 创建一个 cookie, servlet 发给浏览器的一个小信息