猎取jsp各类参数.doc

package coreservlets; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.util.*; /** Creates a table showing the current value of each * of the standard CGI variables. * P * Taken from Core Servlets and JavaServer Pages * from Prentice Hall and Sun Microsystems Press, * /. * copy; 2000 Marty Hall; may be freely used or adapted. */ public class ShowCGIVariables extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(text/html); PrintWriter out = response.getWriter(); String[][] variables = { { AUTH_TYPE, request.getAuthType() }, { CONTENT_LENGTH, String.valueOf(request.getContentLength()) }, { CONTENT_TYPE, request.getContentType() }, { DOCUMENT_ROOT, getServletContext().getRealPath(/) }, { PATH_INFO, request.getPathInfo() }, { PATH_TRANSLATED, request.getPathTranslated() }, { QUERY_STRING, request.getQueryString() }, { REMOTE_ADDR, request.getRemoteAddr() }, { REMOTE_HOST, request.getRemoteHost() }, { REMOTE_USER, request.getRemoteUser() }, { REQUEST_METHOD, request.getMethod() }, { SCRIPT_NAME, request.getServletPath() }, { SERVER_NAME, request.getServerName() }, { SERVER_PORT, String.valueOf(request.getServerPort()) }, { SERVER_PROTOCOL, request.getProtocol() }, { SERVER_SOFTWARE, getServletContext().getServerInfo() } }; String title = Servlet Example: Showing CGI Variables; out.println(ServletUtilities.headWithTitle(title) + BODY BGCOLOR=\#FDF5E6\\n + H1 ALIGN=\CENTER\ + title + /H1\n + TABLE BORDER=1 ALIGN=\CENTER\\n + TR BGCOLOR=\#FFAD00\\n + THCGI Variable NameTHValue); for(int i=0; ivariables.length; i++) { String varName = variables[0]; String varValue = variables[i][1]; if (varValue == null) varValue = INot specified/I; out.println(TRTD + varName + TD + varValue); } out.println(/TABLE/BODY/HTML); } /** POST and GET requests handled identically. */ public void doPost(HttpServletRequest request, HttpServletResponse response