JEE Programming - 04 Java Servlets

1. Module 04 – Java Servlets
Danairat T.
Line ID: Danairat
FB: Danairat Thanabodithammachari
+668-1559-1446

2. JEE and Web Application Development
The Course Outline
Module 01 - Introduction to JEE
Module 02 - The JEE Containers
Module 03 - The Model-View-Controller Design Pattern
Module 04 - Java Servlets
Module 05 - Java Server Pages in MVC
Module 06 - JEE Web Application Deployment
Module 07 - Enterprise Java Bean
Module 08 - JEE Enterprise Application Deployment

3. Java Servlets
Java programming language class
that is used the capabilities of
servers that host applications
accessed by means of a request-
response programming model.
The javax.servlet and
javax.servlet.http packages provide
interfaces and classes for writing
servlets.
The HttpServlet class provides
methods, such as doGet and
doPost, for handling HTTP-specific
services.

4. Java Servlets Architecture
Java Servlets

5. Java Servlets Life Cycle

6. Variable Scopes
Application Scope
Session Scope
Request
Scope
Create in Servlet or JSP and retrieve the attributes
by only next target Servlet or JSP
Create in Servlet or JSP and retrieve the
attributes by Servlet or JSP until
• Servlet/JSP activate session invalidation
• User close Web Browser
Initial attributes by the Application Server
and retrieve the attributes by Servlet or JSP
until Servlet shutdown

7. Java Servlets in Deployment File Structure

8. Hands-on Lab: Basic Servlets

9. Hands-on Lab: Basic Servlets
1. Select “New Application ” 2. Select “Java EE Web Application”

10. Hands-on Lab: Basic Servlets
3. Enter Application Name 4. Click “Next”

11. Hands-on Lab: Basic Servlets
5. Click “Next” 6. Click “Next”

12. Hands-on Lab: Basic Servlets
5. Click “Next” 6. Click “Finish”

13. Hands-on Lab: Basic Servlets
7. Click “New” from “ViewController” project 8. Select “HTTP Servlet”

14. Hands-on Lab: Basic Servlets
9. Click “Next” 10. Enter Class name”, Click “Next”

15. Hands-on Lab: Basic Servlets
11. Click “Next” 12. Click “Finish”

16. Hands-on Lab: Basic Servlets
13. Make Some change in the code

17. Hands-on Lab: Basic Servlets
14. Click “Save” and Click “Run” the Servlet

18. Hands-on Lab: Basic Servlets
15. Result Servlet Web

19. Hands-on Lab: Servlet Data Source
Connection

20. Hands-on Lab: Servlet Data Source Connection
1. Click “New Application ” 2. Select “Java EE Web Application”, Click “OK”

21. Hands-on Lab: Servlet Data Source Connection
3. Enter “Servlet_JDBC_DS” for Application Name 4. Click “Next”

22. Hands-on Lab: Servlet Data Source Connection
5. Click “Next” 6. Click “Next”

23. Hands-on Lab: Servlet Data Source Connection
7. Click “Next” 8. Click “Finish”

24. Hands-on Lab: Servlet Data Source Connection
9. Click “New” from “ViewController” project 10. Select “HTTP Servlet”, Click “OK”

25. Hands-on Lab: Servlet Data Source Connection
11. Enter “Servlet_JDBC_DS” for Class 12. Click “Next”

26. Hands-on Lab: Servlet Data Source Connection
13. Click “Finish”

27. Hands-on Lab: Servlet Data Source Connection
14. Make change to the code

28. Hands-on Lab: Servlet Data Source Connection
15. Make change to the code

29. Hands-on Lab: Servlet Data Source Connection
16. Make change to the code, Click “Run”

30. Hands-on Lab: Servlet Data Source Connection
17. See the Result from Database

31. Hands-on Lab: Servlets and HTTP
Session Handling

32. Hands-on Lab: Servlets and HTTP Session Handling
Creating HTTP Session
1. Click “New Application ” 2. Select “Java EE Web Application”, Click “OK”

33. Hands-on Lab: Servlets and HTTP Session Handling
Creating HTTP Session
3. Enter Servlet Name 4. Click “Next”

34. Hands-on Lab: Servlets and HTTP Session Handling
Creating HTTP Session
5. Click “Next” 6. Click “Next”

35. Hands-on Lab: Servlets and HTTP Session Handling
Creating HTTP Session
7. Click “Next” 8. Click “Finish”

36. Hands-on Lab: Servlets and HTTP Session Handling
Creating HTTP Session
9. Click “New” from “ViewController” project 10. Select “HTTP Servlet”, Click “OK”

37. Hands-on Lab: Servlets and HTTP Session Handling
Creating HTTP Session
11. Enter Servlet Class Name 12. Click “Next”

38. Hands-on Lab: Servlets and HTTP Session Handling
Creating HTTP Session
13. Click “Finish”

39. Hands-on Lab: Servlets and HTTP Session Handling
Creating HTTP Session
14. Make change to the code by set HTTP session attribute

40. Hands-on Lab: Servlets and HTTP Session Handling
Getting HTTP Session
15. Click “New” from “ViewController” project 16. Select “HTTP Servlet”

41. Hands-on Lab: Servlets and HTTP Session Handling
Getting HTTP Session
17. Enter Servlet Name 18. Click “next”

42. Hands-on Lab: Servlets and HTTP Session Handling
Getting HTTP Session
19. Click “Finish”

43. Hands-on Lab: Servlets and HTTP Session Handling
Getting HTTP Session
20. Make change to the code by adding the HTTP session retrieval

44. Hands-on Lab: Servlets and HTTP Session Handling
Getting HTTP Session
21.Click “Run” from the “Servlet_SetHTTPSession”

45. Hands-on Lab: Servlets and HTTP Session Handling
Getting HTTP Session
22. Done execute adding properties to HTTP Session

46. Hands-on Lab: Servlets and HTTP Session Handling
Getting HTTP Session
23. Retrieve the session from other servlet “servlet_gethttpsession”

47. Hands-on Lab: Servlets and HTTP Session Handling
Getting HTTP Session
23. (Optional) Test access the Servlet_GetHTTPSession before the set HTTP Session

48. Hands-on Lab: Servlets invalidate the
HTTP Session

49. Hands-on Lab: Servlets invalidate the HTTP Session
1. Click “New” from “ViewController” project
by using the previous Application workspace 2. Select “HTTPServlet”

50. Hands-on Lab: Servlets invalidate the HTTP Session
3. Enter Servlet Name 4. Click “Finish”

51. Hands-on Lab: Servlets invalidate the HTTP Session
5. Make change to the code

52. Hands-on Lab: Servlets invalidate the HTTP Session
6. Click “Run” from “Servlet_Set_HTTPSession”

53. Hands-on Lab: Servlets invalidate the HTTP Session
7. The result from set session servlet

54. Hands-on Lab: Servlets invalidate the HTTP Session
8. Type the URL to access “Servlet_GetHTTPSession”, The session attribute displayed

55. Hands-on Lab: Servlets invalidate the HTTP Session
9. Access the invalidate HTTP Session

56. Hands-on Lab: Servlets invalidate the HTTP Session
10. Access the “Servlet_GetHTTPSession

57. Hands-on Lab: Servlets Package and
Deployment

58. Hands-on Lab: Servlets Package and Deployment
1. Open “Servlet_JDBC_DataSource”, Click “Deploy” from “ViewController” project

59. Hands-on Lab: Servlets Package and Deployment
2. Select “Deploy to WAR”, Click “Next” 3. Click “Finish”

60. Hands-on Lab: Servlets Package and Deployment
4. You will see the output WAR file 5. Select “Launch Administrative Console”

61. Hands-on Lab: Servlets Package and Deployment
6. Login as WebLogic administrator 7. Click “Deployment”

62. Hands-on Lab: Servlets Package and Deployment
8. Click “Install”

63. Hands-on Lab: Servlets Package and Deployment
9. Select the target WAR file

64. Hands-on Lab: Servlets Package and Deployment
10. Click “Next”

65. Hands-on Lab: Servlets Package and Deployment
11. Application monitoring

66. Hands-on Lab: Servlets Package and Deployment
12. Test Servlet access JDBC Data Source

67. Danairat T.
Line ID: Danairat
FB: Danairat Thanabodithammachari
+668-1559-1446
Thank you