Mastering Advanced Java Practical(AJT): A Step-by-Step Guide

- October 20, 2024

Welcome to this comprehensive guide on Advanced Java (AJT) Practical! If you’re a student or developer working on your Java skills, you’ve come to the right place. In this blog, I’ll walk you through the practical aspects of Advanced Java, covering key concepts and hands-on steps, based on the practical exercises I’ve performed.

OPEN PDF AJT

Manual PDF

Practical No. 02

Aim: Create a registration servlet in Java using JDBC.

Accept the details such as Username, Password, Email and Country from the user using

HTML Form and store the registration details in the database.

Index.html
<html> <head> <title>TODO supply a title</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <form action="RegisterServlet"> <h1> Welcome to Registration page</h1> Enter User Name:<input type="text" name="txtUid"><br><br> Enter Password:<input type="password" name="txtPass"><br><br> Enter Email:<input type="text" name="txtEmail"><br><br> Enter Country:<input type="text" name="txtCon"><br><br> <input type="reset"><input type="submit" value="REGISTER"> </form> </body> </html>
RegisterServlet.java
package mypack; import java.io.*; import java.sql.*; import javax.servlet.*; import javax.servlet.http.*; public class RegisterServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); String id=request.getParameter("txtUid"); String ps=request.getParameter("txtPass"); String em=request.getParameter("txtEmail"); String co=request.getParameter("txtCon"); try{ Class.forName("com.mysql.jdbc.Driver"); Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/logindb1"); PreparedStatement pst=con.prepareStatement("insert into user values(?,?,?,?)"); pst.setString(1,id); pst.setString(2,ps); pst.setString(3,em); pst.setString(4,co); int row=pst.executeUpdate(); out.println("<h1>"+row+"Inserted Successfullyyyyy"); } catch(Exception e) {out.println(e);} }}

:-
Practical No.03
Aim: Using Request Dispatcher Interface create a Servlet which will validate the password entered by the user, if the user has entered the servlet as password then he will be forwarded to welcome servlet else the user will stay on the index.html and an error message will be displayed.:

Index.html
<html> <head> <title>Login Form</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <form action="LoginServlet"> Enter User ID<input type="text" name="txtId"><br> Enter Password<input type="password" name="txtPass"><br> <input type="reset"> <input type="submit" value="Click to Login"> </form> </body> </html>

LoginServlet.java

package mypack;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.RequestDispatcher;
public class LoginServlet extends HttpServlet {
 protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
            out.println("<!DOCTYPE html>");
            out.println("<html>");
    
    out.println("<head>");
            out.println("<title>Servlet LoginServlet</title>");            
            out.println("</head>");
            String uname=request.getParameter("txtId");
            String upass=request.getParameter("txtPass");
            if(uname.equals("admin")&&upass.equals("servlet"))
            {
                RequestDispatcher rd=request.getRequestDispatcher("WelcomeServlet");
                rd.forward(request,response);
            }
            else{
                out.println("<body bgcolor=red>");
                out.println("<h1>Login Fail!!!</h1>");
                RequestDispatcher rd=request.getRequestDispatcher("index.html");
                rd.include(request,response);
            }
            out.println("</body>");
            out.println("</html>");
        }}

WelcomeServlet.java

Practical No.4

Aim: Create a Servlet that uses Cookies to store number of times a user has visited servlet.:-
Index.html
<html> <head> <title>Cookie Demo</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <form action ="Page1" method="get"> Enter your name:<input type="text" name="txtName"><br><br> <input type="submit" value="Click to enter"> </form> </body> </html>
Page1.java
package mypack; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.Cookie; public class Page1 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet Page1</title>"); out.println("</head>"); out.println("<body bgcolor=pink>"); String uname=request.getParameter("txtName"); out.println("<h1>Welcome" +uname+ "</h1>"); Cookie ck1=new Cookie("username",uname); Cookie ck2=new Cookie("visit","1"); response.addCookie(ck1);response.addCookie(ck2); out.println("<h1><a href=Page2>Click to visit Page2 </a></h1>"); out.println("</body>"); out.println("</html>"); } }
Page2.java
package mypack; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.Cookie; public class Page2 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet Page2</title>"); out.println("</head>"); out.println("<body bgcolor=yellow>"); Cookie[] ck=request.getCookies(); for(int i=0;i<ck.length;i++){ if(ck[i].getName().equals("visit")){ int count=Integer.parseInt(ck[i].getValue())+1; out.println("<h1> Visit No:"+count+"</h1>"); ck[i]=new Cookie("visit",count+""); response.addCookie(ck[i]); } else out.println(ck[i].getName()+"="+ck[i].getValue()); } out.println("<h1><a href=Page3>Click to visit Page 3</a></h1>"); out.println("</body>"); out.println("</html>"); } }
Page3.java
package mypack; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.Cookie; public class Page3 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet Page3</title>"); out.println("</head>"); out.println("<body bgcolor=Cyan>"); Cookie[] ck=request.getCookies(); for(int i=0;i<ck.length;i++){ if(ck[i].getName().equals("visit")){ int count=Integer.parseInt(ck[i].getValue())+1; out.println("<h1> Visit No:"+count+"</h1>"); ck[i]=new Cookie("visit",count+""); response.addCookie(ck[i]); } else out.println(ck[i].getName()+"="+ck[i].getValue()); } out.println("<h1><a href=Page3>Click to visit Page 2</a></h1>"); out.println("</body>"); out.println("</html>"); } }

Practical No.5

Aim: Create a Servlet that demonstrating the use of session creation and Destruction. Also check whether the user has visited this page first time or has visited earlier also using session.:-
Index.html
<html> <head> <title>Session Demo</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <form action="Page1" method="get"> Enter User ID<input type="text" name="txtName"><br> <input type="reset"><input type="submit"> </form> </body> </html>
Page1.java
package mypack; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class Page1 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); /* TODO output your page here. You may use following sample code. */ out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet Page1</title>"); out.println("</head>"); HttpSession hs=request.getSession(true); if(hs.isNew()){ out.println("<body bgcolor=yellow"); String name=request.getParameter("txtName"); hs.setAttribute("uname",name); hs.setAttribute("visit","1"); out.println("<h1>Welcome First Time</h1>"); } else{ out.println("<h1>Welcome Again</h1>"); int visit=Integer.parseInt((String)hs.getAttribute("visit"))+1; out.println("<h1>You Visited"+visit+"Times</h1>"); hs.setAttribute("visit",""+visit); } out.println("<h1>Your Session ID"+hs.getId()+"</h1>"); out.println("<h1>You Logged in at"+new java.util.Date(hs.getCreationTime())+"</h1>"); out.println("<h1><a href=Page2>Click for Page2</a></h1>"); out.println("<h1><a href=Page3>Click for Page3</a></h1>"); out.println("<h1><a href=Page4>Click for Page4</a></h1>"); out.println("<h1><a href=LogoutServlet>Click to Terminate Session</a></h1>"); out.println("</body>"); out.println("</html>"); } }
Page2.java
package mypack; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class Page2 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet Page2</title>"); out.println("</head>"); HttpSession hs=request.getSession(false); out.println("<h1>Welcome Again on Page No. 2</h1>"); int visit=Integer.parseInt((String)hs.getAttribute("visit"))+1; out.println("<h1>You Visited"+visit+"Times</h1>"); hs.setAttribute("visit",""+visit); out.println("<h1>Your Session ID"+hs.getId()+"</h1>"); out.println("<h1>You Logged in at"+new java.util.Date(hs.getCreationTime())+"</h1>"); out.println("<h1><a href=Page1>Click for Page1</a></h1>"); out.println("<h1><a href=Page3>Click for Page3</a></h1>"); out.println("<h1><a href=Page4>Click for Page4</a></h1>"); out.println("<h1><a href=LogoutServlet>Click to Terminate Session</a></h1>"); out.println("</body>"); out.println("</html>"); } }
Page3.java
package mypack; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class Page3 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); /* TODO output your page here. You may use following sample code. */ out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet Page3</title>"); out.println("</head>"); HttpSession hs=request.getSession(false); out.println("<h1>Welcome Again on Page No. 3</h1>"); int visit=Integer.parseInt((String)hs.getAttribute("visit"))+1; out.println("<h1>You Visited"+visit+"Times</h1>"); hs.setAttribute("visit",""+visit); out.println("<h1>Your Session ID"+hs.getId()+"</h1>"); out.println("<h1>You Logged in at"+new java.util.Date(hs.getCreationTime())+"</h1>"); out.println("<h1><a href=Page1>Click for Page1</a></h1>"); out.println("<h1><a href=Page3>Click for Page3</a></h1>"); out.println("<h1><a href=Page4>Click for Page4</a></h1>"); out.println("<h1><a href=LogoutServlet>Click to Terminate Session</a></h1>"); out.println("</body>"); out.println("</html>"); }}
LogoutServlet.java
package mypack; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class LogoutServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet LogoutServlet</title>"); out.println("</head>"); out.println("<body>"); javax.servlet.http.HttpSession hs=request.getSession(); if(hs!=null)hs.invalidate(); out.println("<h1>You are Logged out now....</h1>"); out.println("</body>"); out.println("</html>"); } }

Practical No. 6

Aim: Create a servlet application to upload a file.:-
Index.html
<html> <head> <title>TODO supply a title</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <form action="FileUploadServlet" method="post" enctype="multipart/form-data"> Select File to Upload<input type="file" name="file" id="file"> Destination<input type="text" value="D:\Akanksha-TyIT 100\TMP100" name="destination"> <br> <input type="submit" value="Upload File" name="upload" id="upload"> </form> </body> </html>
FileUploadServlet.java
package fileservletapp; import java.io.*; import javax.servlet.*; import javax.servlet.annotation.MultipartConfig; import javax.servlet.http.*; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.Part; @MultipartConfig public class FileUploadServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); String path=request.getParameter("destination"); Part filePart=request.getPart("file"); String fname=filePart.getSubmittedFileName().toString(); String filename=fname.substring(fname.lastIndexOf(File.separator)+1,fname.length()); out.print("<br><br><hr>file name:"+filename); try{ OutputStream os=new FileOutputStream(new File(path+File.separator+filename)); InputStream is=filePart.getInputStream(); int read=0; while((read=is.read())!=-1) { os.write(read); } os.close(); is.close(); out.println("<br>File Uploaded Successfully....!!!!"); } catch(FileNotFoundException e) { out.print(e); } }}

Practical No. 7

Aim: Create a Servlet Application to Download a File:-
Index.html
<html> <head> <title>File Download Page</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <h1>File Download Application</h1> Click <a href="DownloadServlet?filename=D:\Akanksha-TyIT 100\test.txt">Test</a> </body> </html>
DownloadServlet.java
package filedownloadapp; import java.io.*; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class DownloadServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("APPLICATION/OCTET-STREAM"); String filename=request.getParameter("filename"); ServletContext context=getServletContext(); InputStream is=context.getResourceAsStream("/"+filename); PrintWriter out=response.getWriter(); response.setHeader("Content-Disposition","attchment; filename=\""+filename+"\""); java.io.FileInputStream fis=new java.io.FileInputStream(filename); int i; while((i=fis.read())!= -1) { out.write(i); } fis.close(); out.close(); } }

Practical No. 8

Aim: Develop a simple JSP application to display values obtained from the use of intrinsic objects of various types.:-
Index.html
<html> <head> <title>JSP Page</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <form action="4a.jsp"> Enter Your Name<input type="text" name="txtname"> <input type="submit"> </form> </body> </html>
4a.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JSP Page</title> </head> <body> <h1>Use of Intrinsic Objects in JSP</h1> <h1>Request Object</h1> Query String<%=request.getQueryString()%><br> Context Path<%=request.getContextPath()%><br> Remote Host<%=request.getRemoteHost()%><br> <h1>Response Object</h1> Character Encoding Type<%=response.getCharacterEncoding()%><br> Content Type<%=response.getContentType()%><br> Locale<%=response.getLocale()%><br> <h1>Session Object</h1> ID<%=session.getId()%><br> Creation Time<%=new java.util.Date(session.getCreationTime()) %><br> Last Access Time<%=new java.util.Date(session.getLastAccessedTime()) %><br> </body> </html>

Practical No. 9

Aim: Develop a simple jsp application to pass values from one page to another with validation (Name-txt, age-txt, hobbies-checkbox, email-txt, gender-radiobutton):-

Index.html

<html><head>
        <title>User Information Page</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>
        <form action="Validate.jsp">
            Enter Your Name:<input type="text" name="name"><br><br>
            Enter Your Age:<input type="text" name="age"><br><br>
            Select Hobbies:-
            <input type="checkbox" name="hob" value="Singing">Singing
            <input type="checkbox" name="hob" value="Reading">Reading Books
            <input type="checkbox" name="hob" value="Football">Playing Football
            <br><br>
            Enter Email:<input type="text" name="email"<br><br><br>
            Select Gender:-
            <input type="radio" name="gender" value="male">Male
            <input type="radio" name="gender" value="female">FeMale
            <input type="radio" name="gender" value="other">Other<b>
                <input type="hidden" name="error" value=""><br><br>
            <input type="submit" name="gender" value="Submit">
             </form>
    </body>
      
      
      </html>

Validate.jsp

CheckerBean.java

Successful.jsp

Practical No. 10

Aim: Create a JSP page to demonstrate the use of Expression Language:-

Index.html

ExpressionLanguage.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <%session.setAttribute("user","Admin");
        %>
           <%
            Cookie ck=new Cookie("name","Mycookie");
            response.addCookie(ck);
            %>
            Welcome,${param.name}<br>
            Session Value is=${sessionScope.user}<br>
            Cookie name is=${cookie.name.value}<br>
            <%--arithmetic op--%>
            <h2>Arithmetic operators</h2>
            5*5+4is=${5*5+4}<br>
            1.4E4+1.4is=${1.4E4+1.4}<br>
            10 mod 4 is=${10 mod 4}<br>
            15 div 3 is=${15 div 3}<br>
            <%--LogicalOperator--%>
            <h2>Logical Operator</h2>
            true and true is=${true and true}<br>
            true||false is=${true||false}<br>
            not true is=${not true}<br>
            !false is=${!false}
            <%--RelationalOperator--%>
            <h2>Relational Operator</h2>
            10.0==10 is=${10.0==10}<br>
            3.2>=2 is=${3.2>=2}<br>
            2<3 is=${2<3}<br>
            4 lt 6 is=${4 lt 6}<br>
            <h2>Conditional Operator</h2>
            The result of 10>2 is="${(10>1)?'greater':'lesser'}"        
    </body>
</html>

Practical No. 11

Aim: Create an html page with fields, eno, name, age, desg, salary. Now submit this data to a JSP page which will update the employee table of the database with matching eno.:-

Index.html

UpdateEmp.jsp:

<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.Connection"%>
<%@page import="java.sql.DriverManager"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html><head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <h1>Udating Employee Record</h1>
        <%
            int eno=Integer.parseInt(request.getParameter("txtEno"));
            int sal=Integer.parseInt(request.getParameter("txtSal"));
            try{
                Class.forName("com.mysql.jdbc.Driver");
                Connection con=DriverManager.getConnection("jdbc:myql://localhost:3306/db2");
                PreparedStatement stmt=con.prepareStatement("select * from emp1 where empno=?");
                stmt.setInt(1,eno);
                ResultSet rs=stmt.executeQuery();
                if(rs.next()){
                    out.println("<h1>Employee"+rs.getInt(1)+"Exist</h1>");
                    PreparedStatement pst=con.prepareStatement("update emp1 sett salary=? whereempno=?");
                    pst.setInt(2,eno);
                    pst.setInt(1,sal);
                    pst.executeUpdate();
                    out.println("<h1>Employee Record Upadted!!!!</h1>");
                }
                else
                    out.println("<h1>Employee Record not exist!!!!</h1>");
            }
            catch(Exception e)
            {out.println(e);}
            %>
    </body>
</html>

create mysql db
mysql> create database db2;

Query OK, 1 row affected (0.00 sec)

mysql> use db2;

Database changed

mysql> create table emp1 (empno int PRIMARY KEY,empname varchar(20),age int,designation varchar(20),salary int);

Query OK, 0 rows affected (0.01 sec)

mysql> insert into emp1 values(1,"Akshu",18,"CEO",500000);

Query OK, 1 row affected (0.00 sec)

mysql> insert into emp1 values(2,"Ashu",16,"Manager",499990);

Query OK, 1 row affected (0.00 sec)

mysql> insert into emp1 values(3,"Anu",20,"Manager",499999);

Query OK, 1 row affected (0.00 sec)

mysql> select * from emp1;

+-------+---------+------+-------------+--------+

+-------+---------+------+-------------+--------+

| 1 | Akshu | 18 | CEO | 500000 |

| 2 | Ashu | 16 | Manager | 499990 |

| 3 | Anu | 20 | Manager | 499999 |

Practical No. 12

Aim: Create a Currency Converter application using EJB(Stateless Session Bean):-
Index.html
<html> <head> <title>Currency Converter</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <form action="CCServlet"> Enter Amount:<input type="text" name="amt"><br> Select Conversion Type <input type="radio" name="type" value="r2d" checked>Rupees to Dollar <input type="radio" name="type" value="d2r" checked>Dollar to Rupees<br><br> <input type="reset"><input type="submit" value="CONVERT"> </form> </body> </html>
CCServlet.java
package mypack; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import javax.ejb.EJB; import mybeans.CCBean; public class CCServlet extends HttpServlet { @EJB CCBean obj; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); double amt=Double.parseDouble(request.getParameter("amt")); if(request.getParameter("type").equals("r2d")) { out.println("<h1>"+amt+"Rupees="+obj.r2Dollar(amt)+"Dollars</h1>"); } if(request.getParameter("type").equals("d2r")) { out.println("<h1>"+amt+"Dollars="+obj.d2Rupees(amt)+"Rupees</h1>"); } } }
CCBean
package mybeans; import javax.ejb.Stateless; @Stateless public class CCBean { public CCBean(){} public double r2Dollar(double r){return r/65.66;} public double d2Rupees(double d){return d*65.66;} }

Practical No. 13

Aim: Develop simple EJB application to demonstrate Servlet Hit using Singleton Session Beans.
Index.html
<html> <head> <title>TODO supply a title</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <div>TODO write content</div> </body> </html>
SrevletClient.java
package mypack; import ejb.CountServletHitsBean; import javax.servlet.annotation.WebServlet; import java.io.IOException; import java.io.PrintWriter; import javax.ejb.EJB; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet(name="ServletClient",urlPatterns={"/ServletClient"}) public class ServletClient extends HttpServlet { @EJB CountServletHitsBean counterbean; @Override protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); try (PrintWriter out = response.getWriter()) { out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet ServletClient</title>"); out.println("</head>"); out.println("<body>"); out.println("<h1>Number of times this servlet is accessed:"+counterbean.getHitCount()+"</h1>"); out.println("</body>"); out.println("</html>"); } }}
CountSrevletHitsBean
package ejb; import javax.ejb.Singleton; @Singleton public class CountServletHitsBean { private int hitCount=1; public synchronized int getHitCount() { return hitCount++; }}

If you encounter any challenges while following along, feel free to contact me for guidance.

Why Advanced Java?

Advanced Java focuses on high-level programming and development, which involves building applications using Servlet, JSP, JDBC, and various Java frameworks. It enhances the backend capabilities for creating dynamic web pages, handling large-scale transactions, and integrating with databases.

Step-by-Step Guide to AJT Practical

Let’s dive into the core concepts and the practical work involved in your AJT course.

1. Setting Up Your Java Environment

Before we jump into the coding, it’s crucial to have the necessary environment set up. Here’s what you’ll need:

Java Development Kit (JDK) – Ensure the latest version is installed.
Integrated Development Environment (IDE) – I recommend using Eclipse or IntelliJ IDEA for seamless coding and debugging.
Apache Tomcat – This is essential for deploying and testing Java Servlet and JSP-based applications.
MySQL/Any Relational Database – To handle database operations.

Once the tools are in place, you’re all set to start coding!

2. Servlet Programming

Servlets are the backbone of Java Web Applications. In this practical, you’ll learn to:

Create and configure Servlets using @WebServlet annotation.
Handle GET and POST requests in your web application.
Interact with users by processing form inputs.
Use Session Management for maintaining user states across multiple requests.

Example Servlet Code:

java
@WebServlet("/HelloWorld")
public class HelloWorldServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        out.println("<h1>Hello, Welcome to Advanced Java!</h1>");
    }
}

This code handles a simple GET request and responds with a welcome message.

3. JSP (JavaServer Pages)

JSP simplifies the process of creating dynamic web content. Here, you’ll:

Embed Java code into HTML using JSP tags.
Utilize Expression Language (EL) to access backend variables.
Handle form submissions and display data dynamically.

Example JSP Code:

jsp
<%@ page import="java.util.*" %>
<html>
<body>
    <h2>Hello, <%= request.getParameter("username") %>!</h2>
</body>
</html>

This code snippet shows how to capture and display a user’s input from an HTML form.

4. Database Connectivity Using JDBC

Connecting Java applications to a database is a fundamental skill in Advanced Java. With JDBC (Java Database Connectivity), you’ll learn:

How to connect to a MySQL database.
Perform CRUD operations (Create, Read, Update, Delete).
Handle exceptions and ensure secure database transactions.

Basic JDBC Code:

java
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/myDB", "user", "password");
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM Students");

while (rs.next()) {
    System.out.println(rs.getString(1) + " " + rs.getString(2));
}

5. MVC Architecture

The Model-View-Controller (MVC) design pattern separates your code into three distinct components:

Model: Manages the data and business logic.
View: Handles the user interface.
Controller: Acts as an intermediary between Model and View, processing requests and sending responses.

Learning MVC ensures your applications are well-structured and easy to maintain.

6. Session Management and Cookies

Managing user sessions in web applications is critical. Here, you’ll explore:

Creating and managing sessions using HttpSession.
Setting and retrieving cookies for tracking user information across sessions.

7. Exception Handling

Robust applications must handle exceptions gracefully. In Advanced Java, you’ll implement:

Try-catch blocks to handle runtime errors.
Custom error pages to display meaningful messages to the user.
Log exceptions for debugging purposes.

Conclusion

By following this practical guide, you’ll gain hands-on experience in Advanced Java. It’s a vital skill set for anyone looking to specialize in backend development and dynamic web applications. Remember, the more you practice, the more proficient you’ll become!

If you run into any challenges while implementing these steps or have questions about Advanced Java, don’t hesitate to reach out to me via the contact information provided below. I’m happy to assist you on your journey to mastering AJT!

Contact Information:

Email: itschoolsuraj2005@gmail.com
LinkedIn: Your LinkedIn Profile
GitHub: Your GitHub Profile

This blog post should cover the key concepts in Advanced Java Practical (AJT), help your audience understand the practical exercises, and ensure your blog has high-quality content. Let me know if you'd like to add or adjust any sections!

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Mastering Advanced Java Practical(AJT): A Step-by-Step Guide

OPEN PDF AJT

Manual PDF

Why Advanced Java?

Step-by-Step Guide to AJT Practical

1. Setting Up Your Java Environment

2. Servlet Programming

3. JSP (JavaServer Pages)

4. Database Connectivity Using JDBC

5. MVC Architecture

6. Session Management and Cookies

7. Exception Handling

Conclusion

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