我目前正在使用教程（http://www.java-programming.info/tutorial/pdf/csajsp2/07-Cookies.pdf）来尝试启用cookie创建，我的servlet在下面的代码中，但是我想要添加一个 href 或按钮，以便当用户受到欢迎时，他们可以单击并被带到我的 webContent 文件夹中的 jsp ，我正在使用 jsp 、 eclipse indigo 和 tomcat 6 ，任何提示都会真正帮助添加 href 为如下所示不起作用，顺便说一句，代码中的 w3schools 链接可以忽略
package The_Quiz;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
/** Servlet that processes a registration form containing
* a user's first name, last name, and email address.
* If all the values are present, the servlet displays the
* values. If any of the values are missing, the input
* form is redisplayed. Either way, the values are put
* into cookies so that the input form can use the
* previous values.
* <p>
* From <a href="http://courses.coreservlets.com/Course-Materials/">the
* coreservlets.com tutorials on servlets, JSP, Struts, JSF, Ajax, GWT, and Java</a>.
*/
public class RegistrationServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
boolean isMissingValue = false;
String firstName = request.getParameter("firstName");
if (isMissing(firstName)) {
firstName = "Missing first name";
isMissingValue = true;
}
String lastName = request.getParameter("lastName");
if (isMissing(lastName)) {
lastName = "Missing last name";
isMissingValue = true;
}
String emailAddress = request.getParameter("emailAddress");
if (isMissing(emailAddress)) {
emailAddress = "Missing email address";
isMissingValue = true;
}
Cookie c1 = new LongLivedCookie("firstName", firstName);
response.addCookie(c1);
String formAddress =
"The_Quiz.RegistrationForm";
if (isMissingValue) {
response.sendRedirect(formAddress);
} else {
PrintWriter out = response.getWriter();
String docType =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">\n";
String title = "Thanks for Registering";
out.println
(docType +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<CENTER>\n" +
"<H1 ALIGN>" + title + "</H1>\n" +
"<UL>\n" +
" <LI><B>First Name</B>: " +
firstName + "\n" +
"</UL>\n" +
"<a href="Question_1.jsp">Visit W3Schools</a>" +
"</CENTER></BODY></HTML>");
}
}
/** Determines if value is null or empty. */
private boolean isMissing(String param) {
return((param == null) ||
(param.trim().equals("")));
}
}