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From ibozo <iboz...@ku.edu.tr>
Subject Re: Tomcat session varibale
Date Sat, 02 Jun 2007 10:39:40 GMT

Thanks again..
Here is my first code that takes two varibles from client to log in, as
email adress and password. And puts the email adress into a session variable
as:

import javax.servlet.*;
import javax.servlet.http.*;

import java.io.*;
import java.sql.*;

public class sorguservlet extends HttpServlet {
	private static final String CONTENT_TYPE = "text/html";
	PreparedStatement pstmtCheckPassword;
	PreparedStatement pstmtGetName;
	
	public void init() throws ServletException {
		try {
			initializeJdbc();
		}
		catch (Exception ex) {
			ex.printStackTrace();
		}
	}
	
	/**Initialize database connection*/
	private void initializeJdbc() {
		try {
			// Declare driver and connection string
//			String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
//			String connectionString = "jdbc:odbc:exampleMDBDataSource";
			// For Oracle
			String driver = "com.mysql.jdbc.Driver";
			String connectionString =
				"jdbc:mysql://localhost:3306/test?user=root&password=galatasaray";
			
			// Load the Oracle JDBC Thin driver
			Class.forName(driver);
			
			// Connect to the sample database
			Connection conn = DriverManager.getConnection
			(connectionString);
			
			// Create prepared statements
			pstmtCheckPassword = conn.prepareStatement("select count(*) from User
where EmailAdress = ? and Password = ?");
			pstmtGetName = conn.prepareStatement("select Datapath, Name, Date from
User where EmailAdress = ?");
		}
		catch (Exception ex) {
			ex.printStackTrace();
		}
	}
	
	/**Process the HTTP Post request*/
	public void doPost(HttpServletRequest request,
			HttpServletResponse response)
	throws ServletException, IOException {
		// Write HTML back to a browser
		response.setContentType(CONTENT_TYPE);
		
		// Obtain a print stream for sending HMTL to the browser
		PrintWriter out = response.getWriter();
		
		// Obtain username and password
		String EmailAdress = request.getParameter("EmailAdress").trim();
		HttpSession session=request.getSession(true);
		session.setAttribute("EmailAdress", EmailAdress); 
		String Password = request.getParameter("Password").trim();
		
		// Check password
		try {
			pstmtCheckPassword.setString(1, EmailAdress.trim());
			pstmtCheckPassword.setString(2, Password.trim());
			ResultSet resultSet = pstmtCheckPassword.executeQuery();
			resultSet.next();
			if (resultSet.getInt(1) == 1 ) {
				
				pstmtGetName.setString(1, EmailAdress.trim());
				ResultSet resultSet2 = pstmtGetName.executeQuery();
				resultSet2.next();
				String Datapath= resultSet2.getString(1);
				String Name = new String (resultSet2.getString(2));
				String Date = new String (resultSet2.getString(3));
				out.println("<html>");
				out.println("<head><title> Welcome " + Name + "sikeyim" + "
</title></head>");
				out.println("<body>");
				out.println("<h1> Welcome " + Name + "</h1>");
		//		out.println("  http://172.18.4.138:8080/BigBrother" 
http://172.18.4.138:8080/BigBrother" <h1>" + Date + " </h1>  " );
				out.println("  http://172.18.4.138:8080/BigBrother/image.java"  
http://172.18.4.138:8080/BigBrother/image.java" <h1>" + Date + " </h1>  " );
				out.println("<br><br><br>
http://172.18.4.138:8080/BigBrother/Pictures/0.jpg ");
				out.println("</form>");
				out.println("</body>");
				out.println("</html>");
				
			} 	
			
			else{   	
				
				out.println("Your password or Email is incorrect. Please try again");
				
			}
		}
		catch (Exception ex) {
			ex.printStackTrace();
			return;
		}
	}
}

 
And here is my second code that takes the session variable and uses it to
search for the datapaths in database according to the given email adress by
the session variable as:



import javax.servlet.*;
import javax.servlet.http.*;

import java.io.*;
import java.sql.*;
public class image extends HttpServlet{
	PreparedStatement pstmtgetpic;
	
	public void init() throws ServletException {
		try {
			initializeJdbc();
		}
		catch (Exception ex) {
			ex.printStackTrace();
		}
	}
	private void initializeJdbc() {
		try {
			// Declare driver and connection string
//			String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
//			String connectionString = "jdbc:odbc:exampleMDBDataSource";
			// For Oracle
			String driver = "com.mysql.jdbc.Driver";
			String connectionString =
				"jdbc:mysql://localhost:3306/test?user=root&password=galatasaray";
			
			// Load the Oracle JDBC Thin driver
			Class.forName(driver);
			
			// Connect to the sample database
			Connection conn = DriverManager.getConnection
			(connectionString);
			
			// Create prepared statements
			pstmtgetpic = conn.prepareStatement("select Datapath, Name, Date from
User where EmailAdress = ?");
		}
		catch (Exception ex) {
			ex.printStackTrace();
		}
	}
	public void doGet(HttpServletRequest request,
			HttpServletResponse response)
	throws ServletException, IOException {
		// Write HTML back to a browser
		response.setContentType("text/html");
		
		// Obtain a print stream for sending HMTL to the browser
		PrintWriter out = response.getWriter();
		
		// Obtain username and password
		HttpSession session=request.getSession(false); 
		String EmailAdress= (String) session.getAttribute("EmailAdress"); 
		
		// Check password
		try {
			pstmtgetpic.setString(1, EmailAdress); 
			ResultSet resultSet2 = pstmtgetpic.executeQuery();
			resultSet2.next();
			String Datapath= new String( resultSet2.getString(1));
			String Name = new String (resultSet2.getString(2));
			
			out.println("<html>");
			out.println("<head><title> Welcome " + Name + "</title> ");
			out.println("  <meta http-equiv=Refresh content=5>");
			out.println("<body>");
			out.println("<h1> Welcome " + Name + "</h1>");
			out.println(" http://172.18.4.138:8080/BigBrother"+ ");
			
			out.println("</body>");
			out.println("</html>");
		}
		
		
		
		
		catch (Exception ex) {
			ex.printStackTrace();
			return;
		}
	}
}


if you can help me, I will get really appreciate.. 
Best,
ilker


Pid-2 wrote:
> 
> ibozo wrote:
>> Thank you for your help. I used the same codes as you told, however it
>> doesn't help me. Can there be a problem about Tomcat or with the "dopost"
>> and "doget" methods that I use. I took the session variables inside a
>> "dopost" program and I used those session variables in a "doget" program.
>> Waiting for your help..
>> Best,
>> ilker 
> 
> Post your code so we can see what you're doing in each.
> 
> p
> 
> 
>> Rashmi Rubdi-2 wrote:
>>> On 6/1/07, ibozo <ibozcan@ku.edu.tr> wrote:
>>>> Hello all,
>>>>    I have created a file of servlet pages that publish those pages in
>>>> Tomcat
>>>> 6. I have a log in page, programmed by servlet and also another page
>>>> that
>>>> activates the application acording to the given parameters by serching
>>>> webserver. I should use the taken variable on the log in page in
>>>> another
>>>> servlet page. I tried to create a session variable and use it inside
>>>> the
>>>> other web servlet.
>>> I guess you are trying to access a value stored in the HttpSession in
>>> one Servlet inside another Servlet.
>>>
>>> This is very simple ...
>>>
>>> in the first Servlet , you are doing
>>>
>>> HttpSession session = request.getSession();
>>> session.setAttribute("MyAttribute", "MyValue");
>>>
>>> in the  second Servlet you would write
>>>
>>>
>>> HttpSession session = request.getSession();
>>> session.getAttribute("MyAttribute");
>>>
>>>> However I am unable to suceed... Can you help me as soon
>>> It works because the HttpRequest object is available to all Servlet's
>>> inside their doPost and doGet methods.
>>>
>>>> as possible..
>>>> Best,
>>>> ilker
>>> I recommend you read about Servlets, it's all covered in the basics.
>>>
>>> -Rashmi
>>>
>>> ---------------------------------------------------------------------
>>> To start a new topic, e-mail: users@tomcat.apache.org
>>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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>>>
>>>
>>>
>> 
> 
> 
>  
> 

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