Database connection using beans

Hi, I'm very new to JSP. I'm trying to write an application which has a Login page which the user uses to login to a Oracle database (with their own User ID and password). Once the user has successfully logged in I would like to use the same connection to all the other pages the user is traversing until the user logs out. I have come to know that this is possible using beans in JSP or using the connection pool, but I'm not 100% sure how. Can someone please provide me some sample code of the Login page, the beans and a third page which uses the connection. I really appreciate your time and efforts. Thanks a lot in advance for all your efforts and support.
Cheers
Balaji

What you have to learn is how to use session variables after you have successfully logged in your pages. What the next succeeding pages will do is to check if this session variable is not null or valid and then proceed with the display of the pages or redirect it to the login page otherwise. You can implement this sesion variable as a bean to store all the details for a particular user.
Typically you will use
Object o = session.getAttribute("yourSessionVariable");
if (o ==null)
// go to login page OR
// create a session variable
// like session.setAttribute("yourSessionVariable", new Object());
}else
//proceed with the display
Here, o is your bean.
Hope this helps

Similar Messages

  • Jsp and database connection using bean

    * I want create a bean to handle database connectivity.The
              <jsp:usebean> tag uses
              no argument constructor ..so I cannot pass the userid and password to
              the constructor.
              So how can I create a database connection when the user_id and password
              will be a part of parameter ?
              * Now I'm opening database connection in the jsp scriplets. Everytime I
              refresh the
              jsp page a new connection is created ? Is it not going to choke the
              database ? I cannot use connection pool because every user logs in with
              different userid.
              Thanks
              

    You can pass your arguments in this way:
              <jsp:usebean id="myBean" scope="page"/>
              <jsp:setProperty name="myBean" property="userId", value=<%= user_id%>/>
              <jsp:setProperty name="myBean" property="password", value=<%=
              user_password%>/>
              of course, in your bean class, you should create two setter methods,
              setUserId and setPassword.
              Hopefully, this will help you.
              sonia WEN
              Chiranjib Misra wrote:
              > * I want create a bean to handle database connectivity.The
              > <jsp:usebean> tag uses
              > no argument constructor ..so I cannot pass the userid and password to
              > the constructor.
              > So how can I create a database connection when the user_id and password
              > will be a part of parameter ?
              >
              > * Now I'm opening database connection in the jsp scriplets. Everytime I
              > refresh the
              > jsp page a new connection is created ? Is it not going to choke the
              > database ? I cannot use connection pool because every user logs in with
              > different userid.
              >
              > Thanks
              

  • How to make common database connection using bean, etc.

    anyone know how to make a coomon database connection because on my web pages each of them need to connect on the database for their specific objectives... please help
    regards
    blingbling
    Edited by: BlingBling15 on Oct 22, 2007 1:16 PM

    Making a 'common' connection and passing it around is a bad idea. And making a new connection on every page, as you seem to have already guessed, also involves an overhead that you can do without.
    Like drvijayj2k2 has mentioned, you should use connection pooling.
    Take a look at the Apache Commons DBCP [1] and it's examples [2].
    [1] http://commons.apache.org/dbcp/
    [2] http://wiki.apache.org/jakarta-commons/DBCP
    People on the forum help others voluntarily, it's not their job.
    Help them help you.
    Learn how to ask questions first: http://faq.javaranch.com/java/HowToAskQuestionsOnJavaRanch
    ----------------------------------------------------------------

  • How to create database connection using DB2Driver in JDeveloper 10.1.2.1.0?

    I am trying to create a JDeveloper/Data Connection using com.oracle.ias.jdbc.db2.DB2Driver. The driver is registered from a User Libraries: DataDirect JDBC. I have the following class path for the library:
    E:\DataDirect\3.4\lib\YMdb2.jar;E:\DataDirect\3.4\lib\YMbase.jar;E:\DataDirect\3.4\lib\YMutil.jar
    I have no trouble configuring the connection but when I test it and I got ‘No suitable driver Vendor code 0’. What’s wrong? I have successfully created several database connections using Oracle thin driver. This is first time I am using a third party driver. Has any one successfully create a database connection using the com.oracle.ias.jdbc.db2.DB2Driver?

    Hi
    Since the error points to the unavailability of the driver class,can you double check your library claspath entries again.
    I just tried a DB2 connection using the following properties and the connection went through fine:
    Driver class name: com.oracle.ias.jdbc.db2.DB2Driver
    URL: jdbc:merant:db2://<host_name>:50000;DatabaseName=SAMPLE
    Thanks
    Prasanth

  • Dynamic database connection using JNDI

    How to pass the userid and password in get the database connection in weblogic 8.1 app server?
    The following method throws exception while getting the database connection from oracle.
    DataSource.getConnection(String username,String password)
    Please advise if I need to use any other weblogic's method to get the dynamic connection. Every user of this application uses their own useid and password to connect to the database.
    Any help is appreciated.

    ANITA BERDIN wrote:
    Hi,
    I upgraded from WL8.1sp2 to sp4 and basically had to redo everything.
    But since my understanding is that all patches and fixes are already
    incorporated in this version, so I did not apply any patches. Now my
    application which was previously working is getting an error with my
    stateless session bean that I have not had before. This is the error
    I get: I wonder why I would get oracle.jdbc.driver.Accessor.isNull
    error now. Am I missing something in my install? Thanks for any help.
    at oracle.jdbc.driver.Accessor.isNull(I)ZAccessor.java:1682)
         at oracle.jdbc.driver.OracleStatement.wasNullValue()Z(OracleStatement.java:3026)
         at oracle.jdbc.driver.OracleResultSetImpl.wasNull()Z(OracleResultSetImpl.java:111)Hi. You should not have had to redo everything.... Yes, sp4 should contain
    most all of the patches you may have been running for sp2, except for any
    that you may have gotten fairly recently (found recently in sp2, but not
    fixed in time for sp4)...
    The exception above is an internal Oracle thin driver bug (it seems), so
    the difference between sp2 and sp4 may have to do with the version of Oracle's
    thin driver installed. If you want, you can try swapping out the sp4 version of
    the thin driver, and trying the one from sp2, or the latest from oracle etc.
    What is the full stacktrace of the exception? Is that it? No message?
    Joe
         at weblogic.jdbc.wrapper.ResultSet_oracle_jdbc_driver_OracleResultSetImpl.wasNull()Z(Unknown Source)
         at com.merial.wwppsv1.client.ejb.UserDetailListBean.getItems()Ljava.util.List;(UserDetailListBean.java:222)
         at com.merial.wwppsv1.client.ejb.UserDetailListBean_i8as44_ELOImpl.getItems()Ljava.util.List;(UserDetailListBean_i8as44_ELOImpl.java:99)
         at com.merial.wwppsv1.client.action.SearchMenu.execute(Lorg.apache.struts.action.ActionMapping;Lorg.apache.struts.action.ActionForm;Ljavax.servlet.http.HttpServletRequest;Ljavax.servlet.http.HttpServletResponse;)Lorg.apache.struts.action.ActionForward;(SearchMenu.java:76)
         at org.apache.struts.action.RequestProcessor.processActionPerform(Ljavax.servlet.http.HttpServletRequest;Ljavax.servlet.http.HttpServletResponse;Lorg.apache.struts.action.Action;Lorg.apache.struts.action.ActionForm;Lorg.apache.struts.action.ActionMapping;)Lorg.apache.struts.action.ActionForward;(RequestProcessor.java:484)
         at org.apache.struts.action.RequestProcessor.process(Ljavax.servlet.http.HttpServletRequest;Ljavax.servlet.http.HttpServletResponse;)V(RequestProcessor.java:274)
         at org.apache.struts.action.ActionServlet.process(Ljavax.servlet.http.HttpServletRequest;Ljavax.servlet.http.HttpServletResponse;)V(ActionServlet.java:1482)
         at org.apache.struts.action.ActionServlet.doGet(Ljavax.servlet.http.HttpServletRequest;Ljavax.servlet.http.HttpServletResponse;)V(ActionServlet.java:507)
         at javax.servlet.http.HttpServlet.service(Ljavax.servlet.http.HttpServletRequest;Ljavax.servlet.http.HttpServletResponse;)V(HttpServlet.java:740)
         at javax.servlet.http.HttpServlet.service(Ljavax.servlet.ServletRequest;Ljavax.servlet.ServletResponse;)V(HttpServlet.java:853)
         at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run()Ljava.lang.Object;(ServletStubImpl.java:1006)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(Ljavax.servlet.ServletRequest;Ljavax.servlet..ServletResponse;Lweblogic.servlet.internal.FilterChainImpl;)V(ServletStubImpl.java:419)
         at weblogic.servlet.internal.ServletStubImpl.invokeServlet(Ljavax.servlet.ServletRequest;Ljavax.servlet.ServletResponse;)V(ServletStubImpl.java:315)
         at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run()Ljava.lang.Object;(WebAppServletContext.java:6718)
         at weblogic.security.acl.internal.AuthenticatedSubject.doAs(Lweblogic.security.subject.AbstractSubject;Ljava.security.PrivilegedAction;)Ljava.lang.Object;(Optimized Method)
         at weblogic.security.service.SecurityManager.runAs(Lweblogic.security.acl.internal.AuthenticatedSubject;Lweblogic.security.acl.internal.AuthenticatedSubject;Ljava.security.PrivilegedAction;)Ljava.lang.Object;(Optimized Method)
         at weblogic.servlet.internal.WebAppServletContext.invokeServlet(Lweblogic.servlet.internal.ServletRequestImpl;Lweblogic.servlet.internal.ServletResponseImpl;)V(WebAppServletContext.java:3764)
         at weblogic.servlet.internal.ServletRequestImpl.execute(Lweblogic.kernel.ExecuteThread;)V(ServletRequestImpl.java:2644)
         at weblogic.kernel.ExecuteThread.execute(Lweblogic.kernel.ExecuteRequest;)V(Optimized Method)
         at weblogic.kernel.ExecuteThread.run()V(ExecuteThread.java:178)
         at java.lang.Thread.startThreadFromVM(Ljava.lang.Thread;)V(Unknown Source)

  • Connection using bean

    how do we make connection to a ms-acess database using bean....i want to avoid going to control panel and overther go to ODBC...

    http://search.java.sun.com/Search/java?col=javafrm&qp=%2Bforum%3A48&qt=%22dsn+less%22

  • How many number of database connections used in a transaction

    Hi All,
    We are using weblogic 8.1 with Oracle 9i both running on windows 2000. We are trying to estimate the potential resource usage in the system we are building. As part of this activity we want to find out how the database connections are used for entity beans -
    If a session bean calls more than one entity beans
    (each method in the entity bean doing one update) does weblogic use the same database connection for all the entity beans or does it use seperate connections ? Is such behaviour documented somewhere ?
    Here the assumption is all the entity beans are linked to the same datasource.
    If the (default) behaviour is to use seperate connections is there a way to make it use one connection across multiple entity beans.
    Thanks
    Kingshuk

    Hi Bodapati,
    Sorry for the delay in replying to this.
    There is optimization, which will use the XA
    connections from the pool. Can you tell me what your
    observations are? I may be able to see if we can tune it.From our tests the XA driver too appear to make use of one connection only for the life of the transaction. There is a good document here explaining how it is ensured that only one connection is used - http://e-docs.bea.com/wls/docs81/oracle/trxjdbcx.html#1083132
    Quoting from the above URL :
    When a thread attempts to use a connection, the XA jDriver calls xa_open (and xa_start) to create the connection and associate it with the thread. After the database connection is created, the connection remains associated with the thread; the driver does not call xa_close. When the thread subsequently needs a database connection, it uses the same database connection associated with it, even though it appears to get and return a connection from the JDBC connection pool
    I am not sure why you say the connections will be
    blocked. One connection will be blocked only if you are > using non-XA driver to setup the pool, until the
    transaction commits. For XA there is no need to reserve
    the same connection for the transaction.Probably my understanding on this is incorrect and I need to read up. I was under the impression that - once a transaction begins, each connection used within that transaction, is enlisted as a part of that transaction and can not be used by in another transaction until the transaction commits or rollsback.
    Thanks
    Kingshuk

  • How to create a database connection using Jdeveloper 10g

    when i try to create a database connection,its asking for connection name.is that connection name is user-defined or predefined name??In the next step its asking for username and password.where do i get that username and password.if anyone know this please explain me in detail coz this is for the first time am using JDeveloper.
    Thanks in advance.

    Hi user583040,
    May be you could have a look on this: http://my.opera.com/Tiftif/blog/faq-jdeveloper-english §5.2. If you have suggestions to improve this document, i will greatly appreciate to add them to it.
    Regards,
    Tif

  • Database connection using sqlplus

    Hi All,
    Can someone please do explain why am getting different result with the following scenarios:
    scenario 1
    1. I installed a database server and created a user ops$user1 identified externally.
    2. I created a unix user user1 (on the same machine) and make it member of oinstall and dba groups, set the environment variables the same as the oracle user.
    3. I create a database user user2 identified by password2
    4. Login as user1
    5. run sqlplus /nolog
    6. conn / <----- connection successful
    7. conn user2/password2 <---- connection successful
    scenario 2
    1. I created instantclient group and user (nologin) with home directory at /opt/instantclient (perm 750).
    2. I installed instantclient together with sqlplus and put it in /opt/instantclient.
    3. I modified the group profile of user1 by removing oinstall and dba, member it to instantclient group.
    4. set environment variables PATH, ORACLE_SID, LD_LIBRARY_PATH, CLASSPATH to include /opt/instantclient folder.
    5. Login as user1
    6. run sqlplus /nolog
    7. conn / <----- got an error, it says ORA-12545: Connect failed because target host or object does not exist
    8. conn user2/password2 <---- the same error
    9. conn user2/password2@oracle_sid <-- successful
    How come when using instantclient I need to supply the oracle sid? What we need is to connect using instantclient and need not to specify the oracle sid. Is this possible?
    Many thanks for those who will reply.

    Here it is:
    SQL> show parameter authent
    NAME_COL_PLUS_SHOW_PARAM
    TYPE
    VALUE_COL_PLUS_SHOW_PARAM
    os_authent_prefix
    string
    ops$
    remote_os_authent
    boolean
    FALSE

  • AIR application and database connectivity (using JAVA)

    Hi
    I am creating AIR application and I want to connect with the database using java database connectivity (JDBC).
    Can any body give me the some suggestion on how to how to do that.
    Please give me any reference for creating AIR application for database connectivity with mysql/access.
    Thanks
    Sameer

    lots of serching on the google and found that For AIR applications either you use Webservices(JAVA/PHP/.Net) or you can use SQLLite.
    Not found any method for direct connectivity with the database using JDBC.
    If any one found direct connecivity withe database using JAVA then please reply.
    Thanks

  • Database connection using JSWDK

    hii all,
    I am a beginner in JSP.I have a win98 machine where i have installed Java Server pages Web Development Kit.
    I have installed jdk 1.1.3.My Aache Webserver and simple Jsp pages without database connection are running fine.Now when i am using resultset data type in a database application ,a error "type library Resultset "not found "
    is coming.Please help as i cant proceed without this .thank you
    arnab

    try this code
    <%! java.sql.ResultSet rss;%>
    <%! java.sql.Connection con;%>
    <%! java.sql.Statement stat2;%>
    <%
    try
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    con = DriverManager.getConnection("jdbc:odbc:"+DSN_name);
    // conDriverManager.getConnection
    // ("jdbc:odbc:dnsname ");
    stat2= con.createStatement (ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
    rss = stat2.executeQuery("select * from tablename");
    if(rss!=null)
    rss.getString("column_name");
    }//end of try block
    catch(SQLException SE)
    //----some exception handling----
    %>

  • Database Connection using PHP/MySQL on OS X

    I created a database connection originally on my XP machine
    using Dreamweaver CS2 and everything worked as it should. I
    recently switched to a Mac and CS3 and while I can see the
    connection file in the Connections folder, it appears grayed out in
    Dreamweaver. I tried to create a new data connection to see if that
    would solve this problem, but it won't let me. I typed in all the
    information and when I clicked "Test" or to browse for the
    appropriate database it pops up an error message saying "An
    unidentifiable error has occurred". I'm sure I could work around
    this by manually coding everything, but I'm a novice in programming
    and need to be able to use this feature. The worst thing about it,
    is that anytime I have to make a change to the web page, even if
    it's not regarding this section of code, it gets messed up. I have
    made backups, but once they are opened on the Mac they are messed
    up.
    I'm using Dreamweaver CS3, PHP/MySQL on a remote server as I
    still can't get my local web server functioning properly under
    Leopard. Any help would be appreciated because I haven't been able
    to find anything regarding this error online.

    bouldersp wrote:
    > I typed in all the
    > information and when I clicked "Test" or to browse for
    the appropriate database
    > it pops up an error message saying "An unidentifiable
    error has occurred".
    That usually means that something is preventing communication
    between
    Dreamweaver and the testing server. It could be a firewall or
    anti-virus
    software. In the Testing Server section of the Advanced tab
    in Site
    definition, Host directory and URL prefix should both point
    to the same
    place. The first is the physical path to the top level of
    your site, the
    second is the URL you enter into a browser address bar to get
    to the
    same location.
    > I'm using Dreamweaver CS3, PHP/MySQL on a remote server
    as I still can't get
    > my local web server functioning properly under Leopard.
    You might find this tutorial on my website helps:
    http://foundationphp.com/tutorials/php_leopard.php
    David Powers, Adobe Community Expert
    Author, "The Essential Guide to Dreamweaver CS3" (friends of
    ED)
    Author, "PHP Solutions" (friends of ED)
    http://foundationphp.com/

  • How to make new database connection using Oracle BI Interactive Dashboards

    Hi,
    I install Oracle BI Intelligence on my system.
    I am using Oracle BI Interactive Dashboard. Here we have default database connection.
    but now i want to use it for my own database. Can any body give me guideline how to
    make a new data base connection using this s/w or how to connect to my database so
    that i can make my own reports.
    I am using
    http://www.oracle.com/technology/obe/obe_bi/bi_ee_1013/saw/saw.html
    this link.
    i make odbc connection which is fine.
    but
    Restoring the Business Intelligence Presentation Catalog and Updating Metadata
    The third point blow above heading is not clear.
    Thanks

    Umesh - in order to build Answers and Dashboard content you must first setup a Physical model, then a Business model, followed by a Presentation Catalog/Subject Area.
    All these tasks are carried out using the Repository Administration Utility.
    1) Import your physical tables using OCI/ODBC into the physical layer.
    2) Build your model
    3) Deploy
    Then you're ready to start building answers/dashboards.
    Good Luck.

  • Saving/Reading Database Connection using Config.ini

    Ive been searching tutorial on youtube and other known sites on how to save/read the database connection on the config.ini file. Lets say i have this connection,
    SQLServer:192.168.1.2
    UserName:sa
    Password:1234
    DatabaseName:SampleDB
    i find it easy to configure my connection if it would be setup that way but i find a hard time getting a tutorial for that. What would be the things to need if ill be setting up the connection that way. Thanks.

    so you don't want it on the config file instead?
    https://msdn.microsoft.com/en-us/library/system.configuration.connectionstringsettings(v=vs.110).aspx
    https://msdn.microsoft.com/en-us/library/system.configuration.configurationmanager(v=vs.110).aspx
    if you want to do your own, you need streamreader and writer
    https://msdn.microsoft.com/en-us/library/system.io.streamwriter(v=vs.110).aspx
    https://msdn.microsoft.com/en-us/library/system.io.streamreader%28v=vs.110%29.aspx
    Please remember to mark the replies as answers if they help and unmark them if they provide no help.

  • Error due to accessing database connection using jsp

    Hi,
    I have an error, during accessing a datbase using jsp:useBean from jsp.Urgent i need this one
    my source code is
    DbBean.java
    package SQLBean;
    import java.sql.*;
    import java.io.*;
    public class DbBean implements java.io.Serializable{
    private String dbDriver = "sun.jdbc.odbc.JdbcOdbcDriver";
    private Connection dbCon;
    public DbBean(){
    super();
    public boolean connect() throws ClassNotFoundException,SQLException{
    Class.forName(dbDriver);
    dbCon = DriverManager.getConnection("jdbc dbc:mybean","","");
    return true;
    public void close() throws SQLException{
    dbCon.close();
    public ResultSet execSQL(String sql) throws SQLException{
    Statement s = dbCon.createStatement();
    ResultSet r = s.executeQuery(sql);
    return (r == null) ? null : r;
    public int updateSQL(String sql) throws SQLException{
    Statement s = dbCon.createStatement();
    int r = s.executeUpdate(sql);
    return (r == 0) ? 0 : r;
    database.jsp
    <HTML>
    <HEAD><TITLE>DataBase Search</TITLE></HEAD>
    <BODY>
    <%@ page language="Java" import="java.sql.*" %>
    <jsp:useBean id="db" scope="application" class="SQLBean.DbBean" />
    <jsp:setProperty name="db" property="*" />
    <center>
    <h2> Results from </h2>
    <hr>
    <br><br>
    <table>
    <%
    db.connect();
    ResultSet rs = db.execSQL("select * from employ");
    int i = db.updateSQL("UPDATE employ set fname = 'hello world' where empno='000010'");
    out.println(i);
    %>
    <%
    while(rs.next()) {
    %>
    <%= rs.getString("empno") %>
    <BR>
    <%
    %>
    <BR>
    <%
    db.close();
    %>
    Done
    </table>
    </body>
    </HTML>
    The error like this
    org.apache.jasper.JasperException: Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated.
    error: Invalid class file format in C:\Program Files\Apache Tomcat 4.0\webapps\muthu\WEB-INF\classes\SQLBean\DbBean.class. The major.minor version '49.0' is too recent for this tool to understand.
    An error occurred at line: 7 in the jsp file: /database.jsp
    Generated servlet error:
    C:\Program Files\Apache Tomcat 4.0\work\localhost\muthu\database$jsp.java:65: Class SQLBean.DbBean not found.
    SQLBean.DbBean db = null;
    ^
    An error occurred at line: 7 in the jsp file: /database.jsp
    Generated servlet error:
    C:\Program Files\Apache Tomcat 4.0\work\localhost\muthu\database$jsp.java:68: Class SQLBean.DbBean not found.
    db= (SQLBean.DbBean)
    ^
    An error occurred at line: 7 in the jsp file: /database.jsp
    Generated servlet error:
    C:\Program Files\Apache Tomcat 4.0\work\localhost\muthu\database$jsp.java:73: Class SQLBean.DbBean not found.
    db = (SQLBean.DbBean) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "SQLBean.DbBean");
    ^
    4 errors, 1 warning
    Anybody help me?
    Thanx in advance

    Your code is ok . The problem is in java version witch you use to compile the DbBean class . I think you are using java 1.5 try to change to 1.4 compile and run again should help .

Maybe you are looking for

  • Where to find java version 1.4.2-b28

    Hi, I need to download the JSDK (exactly) for the java version 1.4.2-b28. Can someone send me the link?

  • Accordion Problem in Internet Explorer

    Hi, This is the scenario, i developed a small framework and gave it to the developer, which included a Accordion, which i accomplished via using Spry Widget in dreamweaver. Now the problem is, everything works fine when viewed in Firefox and where as

  • Out of gigs on ipod

    I only have 4 pictures on my Ipod and says I that I do not have enough disk space, 28 songs,28 apps.  What can i do to free up space or is there something else in the background?

  • Transfer posting between plant to plant

    Dear Experts, I tried transfer posting MB1B using movement type 301. System is showing following error message u201CFor object RF_BELEG 1010, number range interval 49 does not exist FBN1u201D Message no. NR751 Please help me out to fix this error. Th

  • Autocorrect on an Apple Wireless Keyboard

    I bought an Apple Wireless Keyboard to work with my iPad and I'd like to use it to write in college, but some of my classes are in Spanish and others are in English. So, I enabled both the Spanish and English virtual keyboards, but the Apple Wireless