Play Store Application link – Advance java – in 15 steps – Apps on Google Play
Learn with our youtube video –
7 Step of working process of servlet-
| Step | Description |
|---|---|
| 1 | Client requests a servlet from the server |
| 2 | Server locates the servlet using servlet-mapping and creates request and response objects |
| 3 | Server calls the service method in a new thread, passing the request and response objects as arguments |
| 4 | The service method calls doPost() if the request is a POST request, or doGet() if it is a GET request |
| 5 | The servlet provides output in the response object to the server |
| 6 | Server passes the response object to the client |
| 7 | The thread dies and garbage collection is performed |
Example 1-Web app to call a servlet to print “java is simple” from a html page.
Output-
-2 Files-
1-XYZ.java(inside package ‘abc’)
2-index.html(inside WebContent folder)
1-XYZ.java (servlet)
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
@WebServlet("/XYZ")
public class XYZ extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
out.print("java is simple");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}
2-index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<a href="XYZ">View Profile</a>
</body>
</html>