📄 searchengineform.java
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package coreservlets;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
/** Servlet that builds the HTML form that gathers input
* for the search engine servlet. This servlet first
* displays a textfield for the search query, then looks up
* the search engine names known to SearchUtilities and
* displays a list of radio buttons, one for each search
* engine.
* <P>
* Taken from Core Servlets and JavaServer Pages 2nd Edition
* from Prentice Hall and Sun Microsystems Press,
* http://www.coreservlets.com/.
* © 2003 Marty Hall; may be freely used or adapted.
*/
public class SearchEngineForm extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String title = "One-Stop Web Search!";
String actionURL = "/servlet/coreservlets.SearchEngines";
String docType =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " +
"Transitional//EN\">\n";
out.println
(docType +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n" +
"<BODY BGCOLOR=\"#FDF5E6\">\n" +
"<CENTER>\n" +
"<H1>" + title + "</H1>\n" +
"<FORM ACTION=\"" + actionURL + "\">\n" +
" Search keywords: \n" +
" <INPUT TYPE=\"TEXT\" NAME=\"searchString\"><P>\n");
SearchSpec[] specs = SearchUtilities.getCommonSpecs();
for(int i=0; i<specs.length; i++) {
String searchEngineName = specs[i].getName();
out.println("<INPUT TYPE=\"RADIO\" " +
"NAME=\"searchEngine\" " +
"VALUE=\"" + searchEngineName + "\">\n");
out.println(searchEngineName + "<BR>\n");
}
out.println
("<BR> <INPUT TYPE=\"SUBMIT\">\n" +
"</FORM>\n" +
"</CENTER></BODY></HTML>");
}
}
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