I have a project in java with a My SQL data base which I need to
transfer to Google App engine.
I started with a simple example online:
I created guestbook.jsp and SignGuestbookServlet,But I get this error
Http 404: /sign not found:
I am pasting the necessary files here:
SignGuestbookServlet.java
package guestbook;
import java.io.IOException;
import java.util.logging.Logger;
import javax.servlet.http.*;
import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;
public class SignGuestbookServlet extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 1L;
private static final Logger log =
Logger.getLogger(SignGuestbookServlet.class.getName());
public void doPost(HttpServletRequest req, HttpServletResponse
resp)
throws IOException {
UserService userService = UserServiceFactory.getUserService();
User user = userService.getCurrentUser();
String content = req.getParameter("content");
if (content == null) {
content = "(No greeting)";
}
resp.getWriter().println("Hello,this is jyo world");
/* if (user != null) {
log.info("Greeting posted by user " + user.getNickname() +
": " + content);
} else {
log.info("Greeting posted anonymously: " + content);
}*/
resp.sendRedirect("/guestbook.jsp");
}
}
guestbook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page import="com.google.appengine.api.users.User" %>
<%@ page import="com.google.appengine.api.users.UserService" %>
<%@ page import="com.google.appengine.api.users.UserServiceFactory" %>
<html>
<body>
<%
UserService userService = UserServiceFactory.getUserService();
User user = userService.getCurrentUser();
if (user != null) {
%>
<p>Hello, <%= user.getNickname() %>! (You can
<a href="<%= userService.createLogoutURL(request.getRequestURI())
%>">sign out</a>.)</p>
<%
} else {
%>
<p>Hello!
<a href="<%= userService.createLoginURL(request.getRequestURI())
%>">Sign in</a>
to include your name with greetings you post.</p>
<%
}
%>
<form action="/sign" method="post">
<div><textarea name="content" rows="3" cols="60"></textarea></div>
<div><input type="submit" value="Post Greeting" /></div>
</form>
</body>
</html>
web.xml
<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns="http://java.sun.com/xml/ns/javaee";
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd";
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"; version="2.5">
<servlet>
<servlet-name>sign</servlet-name>
<servlet-class>guestbook.SignGuestbookServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>sign</servlet-name>
<url-pattern>/sign</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>guestbook.jsp</welcome-file>
</welcome-file-list>
</web-app>
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