📄 indexservlet.java
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package com.tiandinet.HiMessage;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.RequestDispatcher;
import java.util.Hashtable;
import java.util.Enumeration;
public class IndexServlet extends HttpServlet {
/**
* Constructor of the object.
*/
public IndexServlet() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
HiMessageFuncs hmf = new HiMessageFuncs();
int pageTotal = 0;
int page = 1;
Conf conf = null;
Hashtable messages = null;
Hashtable replyMsgs = null;
int messageTotal = 0;
try {
conf = hmf.getConfiguration();
messageTotal = hmf.getMessageTotal();
String pageStr = request.getParameter("page");
if (pageStr != null && !pageStr.equals("")) {
page = Integer.parseInt(pageStr);
}
pageTotal = hmf.getPageTotal(messageTotal, conf.getPageshow().intValue());
if (page < 1) {
page = 1;
}
else if (page > pageTotal) {
page = pageTotal;
}
messages = hmf.getMessages(page);
replyMsgs = hmf.getReplyMsgs();
// get url and queryString
String url = request.getRequestURL().toString();
Enumeration em = request.getParameterNames();
String queryString = "";
String parameterName = "";
while (em.hasMoreElements()) {
parameterName = (String)em.nextElement();
queryString += "&" + parameterName + "=" + request.getParameter(parameterName);
}
if (queryString.length() > 1) {
queryString = queryString.substring(1);
}
String pageLink = hmf.pageLink(url, queryString, pageTotal, page);
String adminLogin = "";
HttpSession sess = request.getSession(false);
if (sess != null) {
String loginStatus = (String)sess.getAttribute("loginStatus");
if (loginStatus != null && loginStatus.equals("OK")) {
adminLogin = loginStatus;
}
else {
adminLogin = "";
}
}
// administrator login
request.setAttribute("adminLogin", adminLogin);
request.setAttribute("HiMessageConf", conf);
request.setAttribute("HiMessageMessages", messages);
request.setAttribute("replyMsgs", replyMsgs);
request.setAttribute("messageTotal", Integer.valueOf(messageTotal));
request.setAttribute("pageTotal", Integer.valueOf(pageTotal));
request.setAttribute("pageLink", pageLink);
//response.sendRedirect(request.getContextPath() + "/index.jsp");
RequestDispatcher rd= request.getRequestDispatcher("/messageList.jsp");
rd.forward(request, response);
}
catch (NullPointerException npe) {
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">");
out.println("<html xmlns=\"http://www.w3.org/1999/xhtml\">");
out.println(" <HEAD>");
out.println(" <TITLE>HiMessage - TiandiNet.com</TITLE>");
out.println(" <meta http-equiv=\"Content-Type\" content=\"text/html; charset=gb2312\" />");
out.println(" </HEAD>");
out.println(" <BODY>");
out.println("<font color=\"#FF0000\" family=\"Tahoma\">Fatal Error:</font> Can not connect the Database!");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doGet(request, response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occure
*/
public void init() throws ServletException {
// Put your code here
}
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