values from Appengine datastore is not displayed - google-app-engine

Question

This is my first servlet...
public class ServletCheckServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/plain");
PrintWriter pw=resp.getWriter();
String s1=req.getParameter("username");
String s2=req.getParameter("password");
DatastoreService datastore=DatastoreServiceFactory.getDatastoreService();
Entity employee=new Entity("Employee");
employee.setProperty("firstname", "Ram");
employee.setProperty("lastname", "prasad");
Date hiredate=new Date();
employee.setProperty("Hiredate", hiredate);
employee.setProperty("attendedHRtraining",true);
datastore.put(employee);
Key employeekey=KeyFactory.createKey("employees", "employee1");
}
}
My second servlet is below....
public class ValidUserServlet extends HttpServlet{
protected void doGet(HttpServletRequest req,HttpServletResponse resp){
PrintWriter pw;
try {
pw = resp.getWriter();
pw.println("Welcome to the second servlet");
Key employeekey=KeyFactory.createKey("employees", "employee1");
DatastoreService datastore=DatastoreServiceFactory.getDatastoreService();
try {
Entity employee=datastore.get(employeekey);
String fn=(String) employee.getProperty("firstname");
pw.println(fn);
} catch (EntityNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
But when i run this Application.....the servlet displys...but the values from Appengine datastore is not displayed...
What is the problem in my programs...how to clear this...is it correct......
Please help me.......

Answer 1

Instead of using Key employeekey=KeyFactory.createKey("employees", "employee1");
You can use
Entity employeeEntity = datastore.get(KeyFactory.stringToKey(employee.getId()));
Since you are using a plain old servlet you can get employeeId from request
String employeeId = request.getParameter("employeeId");
Entity employeeEntity = datastore.get(KeyFactory.stringToKey(employeeId);
You can reference this source code to further clarify.