?? message.java
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package com.zhang.www;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class Message extends HttpServlet {
/**
* 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 {
response.setContentType("text/html;charset=GBK");
PrintWriter out = response.getWriter();
request.setCharacterEncoding("GBK");
Date date = new Date();
String mes = null;
String userName = request.getParameter("name");
userName=new String(userName.getBytes("ISO-8859-1"),"GBK");
mes = request.getParameter("message");
if (mes == null || mes.equals("")) {
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.println(" <form name=frmM method=post>");
out.println(userName + " <input type=text name=message size=40>");
out.println(" <br><input type=submit name=sub value=\"發送\">");
out.println(" </form>");
out.println(" </BODY>");
out.println("</HTML>");
} else {
ServletContext sc = getServletContext();
StringBuffer strbuff = (StringBuffer) sc.getAttribute("objMess");
if (strbuff == null)
strbuff = new StringBuffer("");
strbuff.append("<b>" + userName + "說:</b>" + mes + "(" + date + ")"
+ "<br>");
sc.setAttribute("objMess", strbuff);
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.println(" <form name=frmM method=post>");
out.println(userName + " <input type=text name=message size=40>");
out.println(" <br><input type=submit name=sub value=\"發送\">");
out.println(" </form>");
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 {
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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