Re: PROBLEM WITH SERVLETS(DATABASE)

Sin Lam Tue, 20 Apr 1999 09:57:08 -0700



Thanks Henric for answering my questions.  I am wondering what is the difference
between ServletOutputStream and getWriter().   I learned from the Servlet
Programming book the following code.  I thought that is the only way to output
stuff.
Could you enlighten me why you would use one way verus the other?  Thanks.


public class HelloWorld extends HttpServlet{
     public void doGet(HttpServletRequest req, HttpServletResponse res)
                    throws ServletException, IOException{
          res.setContentType("text/html");
          PrintWriter out = res.getWriter();

          String sName[] = req.getParameterValues("name");

          out.println("<HTML>");
          out.println("<HEAD><TITLE>Hello, " + sName[0] + "</TITLE></HEAD>");
          out.println("<BODY>");
          out.println("<BIG>Hello, </BIG>" + sName[0]);
          out.println("<P>User Agent = " + req.getHeader("User-Agent") );
          out.println("</BODY></HTML>");
     }





Henric Larsson <[EMAIL PROTECTED]> on 04/20/99 11:08:47 AM

Please respond to "A mailing list for discussion about Sun Microsystem's Java
      Servlet API Technology." <[EMAIL PROTECTED]>

To:   [EMAIL PROTECTED]
cc:    (bcc: Sin Lam/Whittman-Hart LP)
Subject:  Re: PROBLEM WITH SERVLETS(DATABASE)




sos object is the ServletOutputStream, the object that you write your output to.

you get it by calling response.getOutputStream();

.henric

----- Original Message -----
From: Sin Lam <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, April 20, 1999 4:40 PM
Subject: Re: PROBLEM WITH SERVLETS(DATABASE)




What is sos object?  I don't see it defined in the original source below.    Why
do you have to flush it?








--------------------------------------------------------------------------------


��äȯ <[EMAIL PROTECTED]> on 04/20/99 08:19:49 AM

Please respond to "A mailing list for discussion about Sun Microsystem's Java
      Servlet API Technology." <[EMAIL PROTECTED]>

To:   [EMAIL PROTECTED]
cc:    (bcc: Sin Lam/Whittman-Hart LP)
Subject:  Re: PROBLEM WITH SERVLETS(DATABASE)





--------------------------------------------------------------------------------



You have to flush the sos object. This is the modified source.

          while(rs.next())
          {
               String str=rs.getString(1);
               res.setContentType("text/html");
              sos.println("the user_id is "+str);
               }
         }
          catch(Exception e)
          {   }

         sos.flush();      // added line
         sos.close();     // added line


      }
}

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���� �޽���-----
���� ���: thumma sunil <[EMAIL PROTECTED]>
�޴� ���: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
��¥: 1999�� 4�� 20�� ȭ���� ���� 7:54
����: PROBLEM WITH SERVLETS(DATABASE)


>hello everybody  iam sunil
>
>   i have a problem with servlets(database).i had compiled the source
>code successfully and placed the class file in the servlets dir of
>javawebserver1.1.3 which i had downloaded from java.sun.com
>the problem is whenever iam loading the file on the browser iam
>getting
> a message box that NO DOCUMENTS FOUND is appearing on the browser
>netscape navigator 4.0 .
>  this problem is for only for servlets that are trying to connect to
>the database. other servlets(other than the database) are working
>normally
>   could any  one can help me?
>   source code hope this is correct
>   import java.io.*;
>import java.sql.*;
>import javax.servlet.*;
>import javax.servlet.http.*;
>
>public class user extends HttpServlet
>{
>     Statement st;
>     public void service(HttpServletRequest req,HttpServletResponse
>res)
>     {
>
>          try
>          {
>          ServletOutputStream sos=res.getOutputStream();
>          Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
>// databse is msaccess
>          Connection
>con=DriverManager.getConnection("jdbc:odbc:sunil");
>          st=con.createStatement();
>          ResultSet rs=st.executeQuery("Select * from log");
>          while(rs.next())
>          {
>               String str=rs.getString(1);
>               res.setContentType("text/html");
>              sos.println("the user_id is "+str);
>               }
>         }
>          catch(Exception e)
>          {   }
>      }
>}
>
>
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___________________________________________________________________________
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___________________________________________________________________________
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Re: PROBLEM WITH SERVLETS(DATABASE)

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