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九、处理Cookie

时间:2007-10-22 来源:不详作者:林子

String searchString =
ServletUtilities.getCookieValue(cookies,
"searchString",
"Java Programming");
String numResults =
ServletUtilities.getCookieValue(cookies,
"numResults",
"10");
String searchEngine =
ServletUtilities.getCookieValue(cookies,
"searchEngine",
"google");
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "Searching the Web";
out.println(ServletUtilities.headWithTitle(title)
"＜BODY BGCOLOR=＼"#FDF5E6＼"＞＼n"
"＜H1 ALIGN=＼"CENTER＼"＞Searching the Web＜/H1＞＼n"
"＼n"
"＜FORM ACTION=＼"/servlet/hall.CustomizedSearchEngines＼"＞＼n"
"＜CENTER＞＼n"
"Search String:＼n"
"＜INPUT TYPE=＼"TEXT＼" NAME=＼"searchString＼"＼n"
" VALUE=＼"" searchString "＼"＞＜BR＞＼n"
"Results to Show Per Page:＼n"
"＜INPUT TYPE=＼"TEXT＼" NAME=＼"numResults＼"＼n"
" VALUE=" numResults " SIZE=3＞＜BR＞＼n"
"＜INPUT TYPE=＼"RADIO＼" NAME=＼"searchEngine＼"＼n" 内容来自dedecms
" VALUE=＼"google＼""
checked("google", searchEngine) "＞＼n"
"Google |＼n"
"＜INPUT TYPE=＼"RADIO＼" NAME=＼"searchEngine＼"＼n"
" VALUE=＼"infoseek＼""
checked("infoseek", searchEngine) "＞＼n"
"Infoseek |＼n"
"＜INPUT TYPE=＼"RADIO＼" NAME=＼"searchEngine＼"＼n"
" VALUE=＼"lycos＼""
checked("lycos", searchEngine) "＞＼n"
"Lycos |＼n"
"＜INPUT TYPE=＼"RADIO＼" NAME=＼"searchEngine＼"＼n"
" VALUE=＼"hotbot＼""
checked("hotbot", searchEngine) "＞＼n"
"HotBot＼n"
"＜BR＞＼n"
"＜INPUT TYPE=＼"SUBMIT＼" VALUE=＼"Search＼"＞＼n"
"＜/CENTER＞＼n"
"＜/FORM＞＼n"
"＼n"
"＜/BODY＞＼n"
"＜/HTML＞＼n");
}

private String checked(String name1, String name2) {
if (name1.equals(name2))
return(" CHECKED");
else
return("");
}
}
　　 CustomizedSearchEngines.java
　　前面的SearchEnginesFrontEnd Servlet把数据发送到CustomizedSearchEngines Servlet。本例在许多方面与前面介绍HTTP状态代码时的例子相似，区别在于，本例除了要构造一个针对搜索引擎的URL并向用户发送一个重定向应答之外，还要发送保存用户数据的Cookies。