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Bkbiet day2 & 3
- 1. 04/06/2013 - 05/06/2013 BKBIET Phase I Day 2 , Day 3 Thursday, 13 June 13
- 2. Today.... ✤ Technical ✤ Servlet Platform ✤ tomcat ✤ Database ✤ postgreSQL,mysql,h2 ✤ Atlassian - Jira Thursday, 13 June 13
- 3. Servlets ✤ Servlets - Java CGI? ✤ run inside a servlet container ✤ encapsulate HTTP in java objects ✤ HTTPServletRequest ✤ HTTPServletResponse ✤ provide methods to process HTTP methods ✤ doGet ✤ doPost public class HelloWorld extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); out.println("<html>"); out.println("<head>"); out.println("<title>Hello World!</title>"); out.println("</head>"); out.println("<body>"); out.println("<h1>Hello World!</h1>"); out.println("</body>"); out.println("</html>"); } } Thursday, 13 June 13
- 4. Exercise! ✤ Create a Hello World Servlet! ✤ create a project in eclipse ✤ create src file ✤ create web.xml file ✤ add source/details ✤ deploy! ✤ Development Stations!! Thursday, 13 June 13
- 5. Databases ✤ Relational Databases ✤ ACID ✤ Transactions ✤ JDBC ✤ Database Connections ✤ Queries ✤ ResultSets! Thursday, 13 June 13
- 6. Exercise ✤ Create a db bkbiet ✤ Create a table bkbiet ✤ id ✤ name ✤ age ✤ email ✤ Use java to connect to db ✤ insert your own data in table CREATE TABLE `bkbiet`.`bkbiet` ( `id` INT NOT NULL AUTO_INCREMENT , `name` VARCHAR(45) NOT NULL , `stream` VARCHAR(45) NOT NULL , `email` VARCHAR(45) NOT NULL , PRIMARY KEY (`id`) , UNIQUE INDEX `id_UNIQUE` (`id` ASC) ); String insertTableSQL = "INSERT INTO DBUSER" ! ! + "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES" ! ! + "(?,?,?,?)"; PreparedStatement preparedStatement = dbConnection.prepareStatement(insertTableSQL); preparedStatement.setInt(1, 11); preparedStatement.setString(2, "mkyong"); preparedStatement.setString(3, "system"); preparedStatement.setTimestamp(4, getCurrentTimeStamp()); // execute insert SQL stetement preparedStatement .executeUpdate(); Thursday, 13 June 13
- 7. Templates ✤ Difficult to write long html pages ✤ requires templates ✤ Enter JSP ✤ Servlets feed data(model) to jsp ✤ converts to html pages ✤ JSP get converted to servlets at runtime Thursday, 13 June 13
- 8. MVC Recall ✤ Model-View-Controller ✤ separate the data from the view ✤ Servlet: Controller ✤ DAO: Data Access Object ✤ View: JSP Thursday, 13 June 13
- 9. Exercise ✤ Create a web site for users ✤ enter their details into the db ✤ create a page to view all details ✤ search for a user <HTML> <HEAD> <TITLE>A Sample Form Using GET</TITLE> </HEAD> <BODY> <FORM ACTION="http://localhost:8080/bkbiet/ BKBIETServlet" METHOD=”POST”> <CENTER> Name: <INPUT TYPE="TEXT" NAME="name" VALUE="Joe"><BR> Last name: <INPUT TYPE="TEXT" NAME="age" VALUE="26"><BR> <INPUT TYPE="email" NAME="email" VALUE="abc@example.com"><P> <INPUT TYPE="SUBMIT"> <!-- Press this button to submit form --> </CENTER> </FORM> </BODY> </HTML> Thursday, 13 June 13