编译错误？？？

ajzhn 2002-05-27 11:11:49

以下为源程序：

public class ServletUtilities {
public static final String DOCTYPE =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">";

public static String headWithTitle(String title) {
return(DOCTYPE + "\n" +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n");
}

//getCookieValue方法：获取指定名字的Cookie值
public static String getCookieValue( Cookie[] cookies,
String cookieName,
String defaultValue) {
for(int i=0; i<cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookieName.equals(cookie.getName()))
return(cookie.getValue());
}
return(defaultValue);
}

// 其他工具函数的代码在本文后面介绍
}

在编译时会出现下列信息，是什么原因？求教　！！！

ServletUtilities.java:13: cannot resolve symbol
symbol : class Cookie
location: class ServletUtilities
public static String getCookieValue( Cookie[] cookies,
^
ServletUtilities.java:17: cannot resolve symbol
symbol : class Cookie
location: class ServletUtilities
Cookie cookie = cookies[i];
^
2 errors

...全文

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Andrawu 2002-05-28

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import javax.servlet.http.Cookie;
//增加Cookie包

public class ServletUtilities {
public static final String DOCTYPE =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">";

public static String headWithTitle(String title) {
return(DOCTYPE + "\n" +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n");
}

//getCookieValue方法：获取指定名字的Cookie值
public static String getCookieValue( Cookie[] cookies,
String cookieName,
String defaultValue) {
for(int i=0; i<cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookieName.equals(cookie.getName()))
return(cookie.getValue());
}
return(defaultValue);
}

// 其他工具函数的代码在本文后面介绍
}

liberty2000 2002-05-27