📄 displayservlet.java
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package chat;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class DisplayServlet extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
//Initialize global variables
public void init() throws ServletException {
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
response.setContentType(CONTENT_TYPE);
response.setCharacterEncoding("GBK");
request.setCharacterEncoding("GBK");
PrintWriter out = response.getWriter();
ServletContext app = getServletContext();
StringBuffer strMsg = (StringBuffer)app.getAttribute("objMessage");
if (strMsg == null) {
strMsg = new StringBuffer ();
}
displayHtml(out,strMsg);
out.close();
}
public void displayHtml(PrintWriter out,StringBuffer message) {
out.println("<html>");
out.println("<meta http-equiv = 'refresh' content = '3;displayServlet'>");
out.println("<head><title>displayServlet</title></head>");
out.println("<body>");
out.println(message.toString());
out.println("</body></html>");
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
doGet(request, response);
}
//Clean up resources
public void destroy() {
}
}
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