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<p align="center"><big><strong>jsp源碼實例3(獲取jsp各種參數）</strong></big></p>
<div align="right">（文/blackwhites）</div>
<p>
package coreservlets;<br>
<br>
import java.io.*;<br>
import javax.servlet.*;<br>
import javax.servlet.http.*;<br>
import java.util.*;<br>
<br>
/** Creates a table showing the current value of each<br>
* of the standard CGI variables.<br>
* <P><br>
* Taken from Core Servlets and JavaServer Pages<br>
* from Prentice Hall and Sun Microsystems Press,<br>
* http://www.coreservlets.com/.<br>
* &copy; 2000 Marty Hall; may be freely used or adapted.<br>
*/<br>
<br>
public class ShowCGIVariables extends HttpServlet {<br>
public void doGet(HttpServletRequest request,<br>
HttpServletResponse response)<br>
throws ServletException, IOException {<br>
response.setContentType("text/html");<br>
PrintWriter out = response.getWriter();<br>
String[][] variables =<br>
{ { "AUTH_TYPE", request.getAuthType() },<br>
{ "CONTENT_LENGTH",<br>
String.valueOf(request.getContentLength()) },<br>
{ "CONTENT_TYPE", request.getContentType() },<br>
{ "DOCUMENT_ROOT",<br>
getServletContext().getRealPath("/") },<br>
{ "PATH_INFO", request.getPathInfo() },<br>
{ "PATH_TRANSLATED", request.getPathTranslated() },<br>
{ "QUERY_STRING", request.getQueryString() },<br>
{ "REMOTE_ADDR", request.getRemoteAddr() },<br>
{ "REMOTE_HOST", request.getRemoteHost() },<br>
{ "REMOTE_USER", request.getRemoteUser() },<br>
{ "REQUEST_METHOD", request.getMethod() },<br>
{ "SCRIPT_NAME", request.getServletPath() },<br>
{ "SERVER_NAME", request.getServerName() },<br>
{ "SERVER_PORT",<br>
String.valueOf(request.getServerPort()) },<br>
{ "SERVER_PROTOCOL", request.getProtocol() },<br>
{ "SERVER_SOFTWARE",<br>
getServletContext().getServerInfo() }<br>
};<br>
String title = "Servlet Example: Showing CGI Variables";<br>
out.println(ServletUtilities.headWithTitle(title) +<br>
"<BODY BGCOLOR=\"#FDF5E6\">\n" +<br>
"<H1 ALIGN=\"CENTER\">" + title + "</H1>\n" +<br>
"<TABLE BORDER=1 ALIGN=\"CENTER\">\n" +<br>
"<TR BGCOLOR=\"#FFAD00\">\n" +<br>
"<TH>CGI Variable Name<TH>Value");<br>
for(int i=0; i<variables.length; i++) {<br>
String varName = variables[i][0];<br>
String varValue = variables[i][1];<br>
if (varValue == null)<br>
varValue = "<I>Not specified</I>";<br>
out.println("<TR><TD>" + varName + "<TD>" + varValue);<br>
}<br>
out.println("</TABLE></BODY></HTML>");<br>
}<br>
<br>
/** POST and GET requests handled identically. */<br>
<br>
public void doPost(HttpServletRequest request,<br>
HttpServletResponse response)<br>
throws ServletException, IOException {<br>
doGet(request, response);<br>
}<br>
}<br>
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