JSP + JAVA Beans +Torque

Hey,
I am using Torque to connect MySQL DB to JSP page, so I am using JAVA Beans, which is created by torque, I wish to use pagination to retrieve the entries from database, plz tell me how can I implement it here.

Try the following forum (about JSP technology)
http://forum.java.sun.com/forum.jspa?forumID=45
Also try the following forum (about JDBC technology)
http://forum.java.sun.com/forum.jspa?forumID=48

Similar Messages

  • Do all JSP/Java bean webapps need an xml file?

    Hi all,
    I have a jsp/ java bean webb application. This is being run on Resin at
    Lunarpages.
    The site has been shut down due to 'class-loader' not found. I was told it
    was causing problems for other java users on the server.
    I realise this is limited information but any insight would be welcome.
    This is our first JSP / java bean web app.
    Also if anyone could tell me briefly the purpose of an xml document in a JSP/Java bean webapplication I would greatly appreciate it.
    Thanks in advance
    Regards
    Jim

    Hi there,
    Thanks for the reply.
    Our application allows people to purchase wedding pictures online. It ran locally on resin we then had to change all the relative file paths in order to deploy it on lunarpages.
    Lunarpages use resin also.
    We had the application tested and working on Lunarpages for the last week .This morning they sent us a message saying they had shut our JSP pages down as our application was causing problems for other java users. errant code unknown element ' class-loader' .
    Not too much help from lunarpages...
    thanks

  • Column Not found error while trying to access databse through JSP+Java Bean

    I am trying to acees MS Access 2003 db through JSP using Tomcat 5.0.28.The code for accessing the databse is incorporated in the bean.The jsp only calls the particular method of the bean .
    Code for Java Bean:
    package ActiveViewer;
    import java.sql.*;
    import java.util.*;
    public class CompanyBean
    Connection con;
    ResultSet rs=null;
    Statement st;
         public CompanyBean(){}
         public void connect()
         try
         Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    System.out.println("Here4");
    con=DriverManager.getConnection("jdbc:odbc:activeviewer","","");
         System.out.println("Here1");
         catch (ClassNotFoundException e)
         System.out.println("Could not locate driver.");
    catch (SQLException e)
    System.out.println("An SQL Exception has occured :: "+e);
         e.printStackTrace();
         catch (Exception e)
    System.out.println("An unknown Exception has occured :: "+e);
         e.printStackTrace();
    public void disconnect()
         try
         if (con!=null)
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         catch (SQLException e)
    System.out.println("An SQL Exception has occured :: "+e);
         e.printStackTrace();
    public ResultSet select(String username)
    if(con!=null)
         try
    st=con.createStatement();
         rs=st.executeQuery("select * from company where username='" + username + "'");
    catch (SQLException e)
    System.out.println("An SQL Exception has occured :: "+e);
         e.printStackTrace();
    catch (Exception e)
    System.out.println("An Exception has occured while retrieving :: "+e);
    e.printStackTrace();
    else
    System.out.println("Connection to database was lost.");
    return rs;
    The code for JSP that uses the above bean is:
    <%@ page language="java" import="java.sql.*,ActiveViewer.* " contentType="text/html"%>
    <jsp:useBean id="conn" scope="session" class="ActiveViewer.CompanyBean" />
    <html>
    <body>
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    String password=request.getParameter("password");
    System.out.println("username:"+username);
    System.out.println("password:"+password);
    conn.connect();
    ResultSet rs=conn.select(username);
    System.out.println("Below select ");
    while (rs.next())
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         String dbpassword=rs.getString("password");
         if(dbusername.equals(username) && dbpassword.equals (password))
    { %> out.println("OK");
              <% }
    else { %>Invalid Username and / or Password.
    <br>Clickhere to go back to Login Page.
    <% }
    } %>
    </body>
    </html>
    I get the following error:
    HTTP Status 500 -
    type Exception report
    message
    description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    javax.servlet.ServletException: Column not found
    though the database is not int he same folder as the jsp, the DSN is set correctly to pint to the db location.The jsp does print in stdout file:
    Here4 (from connect method above)
    Here 1 (from connect method above)
    Below Select (from jsp)
    This means that the jsp does connect to db but it gives the above error.Also the field name also matches that in the database and data is present in the db too.
    All other things like creating package for bean,incorporating the packakage are done.
    Can someone please help me with their precious advice?

    U're getting this error because there is no field called 'password' in ur database, the field in ur database is named 'cpassword' and not 'password'. So change the statement rs.getString("password"); to rs.getString("cpassword");

  • Urgent help is needed - JSP & Java beans

    Hi,
    I am getting the following problem when trying to interact with Javabeans from JSP (DB I use is Cloudscape) :
    An exception occurred while interacting with the guestbook database.
    The error message was:
    Cannot create bean of class proj.beans.UserDataBean
    Please try again later
    The problem probably occurs in following line:
    status = guestData.checkUser(userName,emailName);
    where guestData represents a Javabean class.
    The strangest thing is that sometimes, suddenly, the program is working OK without this Error Message but when it occurs I don't know the reason and how to solve it.
    Please advise...
    Thanks a lot.

    Can you copy the entire stack trace and post it? It would probably help.

  • Philisophical Question:  Tools for synchronizing JSPs, Java Beans and XML?

    This is a "best practices" question...
    The JSTL and JSF tags provide a lot of support for minimizing the amount of text that must be included in a JSP page. For example:
    <c:out value="${customer.firstName}"/>This snippet will find an object named "customer" in any of the JSP scopes, extract the value of the property named "firstName", and output it as part of the page.
    Here are my questions:
    (1) Is there a recommended method to communicate to the page designer what objects are in scope for a particular page, and what the properties of those objects are?
    (2) Is there any programmatic way to determine from the program's source code that an object with the specified name and of the expected type will be in scope at run time?
    I would love to have an IDE that would be able to help the page designer by providing a list of the objects that are expected to be in scope, along with the name of their properties. What conventions exist to make this possible?

    Maybe you like this, it's one of dozens of tools for Struts and in version 3.0
    http://www.scioworks.com/scioworks_camino.html
    hth,
    .V

  • First use of jsp and java bean and "Unable to compile class for JSP" error

    Hi,
    I am trying to create my first jsp + java bean and I get a basic error (but I have no clue what it depends on exactly). Tomcat seems to cannot find my class file in the path. Maybe it is because I did not create a web.xml file. Did I forgot to put a line in my jsp file to import my bean?
    Thank you very much for your help.
    Here is my error:
    An error occurred at line: 2 in the jsp file: /login.jsp
    Generated servlet error:
    [javac] Compiling 1 source file
    /usr/local/tomcat/jakarta-tomcat-5/build/work/Catalina/localhost/test/org/apache/jsp/login_jsp.java:43: cannot resolve symbol
    symbol : class CMBConnect
    location: class org.apache.jsp.login_jsp
    CMBConnect test = null;
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    test/WEB-INF/classes/CMBConnect.java
    test/WEB-INF/classes/CMBConnect.class
    Do I need to declare another directory in classes to put my class file in it and package my bean differently?
    Here is my login.jsp:
    <%@ page errorPage="error.jsp" %>
    <jsp:useBean id="test" type="CMBConnect" scope="session" />
    <html>
    <head>
    <title>my test</title>
    </head>
    <body>
    <h3>Login information</h3>
    <b><%=session.getValue("customerinfo.message")%></b>
    <form> ....... </form>
    </body>
    </html>
    and here is my CMBConnect.java:
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.SQLException;
    public class CMBConnect
    public CMBConnect () { }
    public String openConnection(String id, String password) {
    String returnText = "";
    try {
    Connection con = null;
    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    con = DriverManager.getConnection("jdbc:oracle:thin:@myserver.abc.com:1521:TEST", id, password);
    if(con.isClosed())
    returnText = "Cannot connect to Oracle server using TCP/IP...";
    else
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    } catch (Exception e) { returnText = returnText + e; }
    return returnText;
    Thanks again!

    Thanks for you help
    I created the package and I get this error this time:
    javax.servlet.ServletException: bean test not found within scope
         org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:822)
         org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:755)
         org.apache.jsp.login_jsp._jspService(login_jsp.java:68)
         org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
         javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
         org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:268)
         org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:277)
         org.apache.jasper.servlet.JspServlet.service(JspServlet.java:223)
         javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

  • What is the difference between java direct or java bean in JSP?

    What is the difference if I use java code directly in JSP or use java bean in JSP?
    Which class to use for receiving the passed parameter from html or java script? Any difference for java code and java bean in the way receiving the passed data?
    How can I pass string from jsp to html or java script?

    it's generally accepted as better design to separate presentation from logic. meaning, the java code in the jsp should be used to support displaying data, as oppsoed to implementing the application - like database access, etc.
    when the logic is separated from the presentation, it allows you to reuse logic components within several jsp pages.
    if you decide to change the presentation layer in the future (to support wap, for example) you don't need to rewrite your entire application, since the "guts" of the application is outside of the jsps.
    it is also a good idea to separate your business logic from your data layer. adding a "buffer zone" between these layers helps in the same manner as in separating presentation from logic. if you're using flat files for storage now, upgrading to a database wouldn't require rewriting all your business logic, just the methods which write out the data to a file, for example.
    once you feel comfortable with separating the various layers, check out the struts framework at http://jakarta.apache.org/
    to answer your second question, to get parameters passed in from HTML forms, use ServletRequet's getParameter() method.
    in tomcat:
    <% String lastName = request.getParameter( "lastname" ); %>
    to answer your third question: when displaying the HTML from withing a jsp, print out the string to a javascript variable or a hidden form element:
    <% String firstName = "mike"; %>
    <input type="hidden" name="firstname" value="<%= firstName %>">
    <script language="javascript1.2">
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    this jsp results in the following html:
    <input type="hidden" name="firstname" value="mike">
    <script language="javascript1.2">
    var firstName = "mike";
    </script>

  • Problem with java beans and jsp on web logic 6.0 sp1

              HI ,
              I am using weblogic6.0 sp1.
              i have problem with jsp and java beans.
              i am using very simple java bean which stores name and email
              from a html form.
              but i am getting following errors:
              Full compiler error(s):
              D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
              cannot resolve symbol
              symbol : class userbn
              location: class jsp_servlet._savename2
              userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
              ^
              D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
              cannot resolve symbol
              symbol : class userbn
              location: class jsp_servlet._savename2
              userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
              ^
              D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:94:
              cannot resolve symbol
              symbol : class userbn
              location: class jsp_servlet._savename2
              ud = (userbn) java.beans.Beans.instantiate(getClass().getClassLoader(),
              "userbn"); //[ /SaveName2.jsp; Line: 7]
              ^
              3 errors
              in which directory should i place java bean source file(.java file)
              here is my jsp file:
              <%@ page language = "java" contentType = "text/html" %>
              <html>
              <head>
              <title>bean2</title>
              </head>
              <body>
              <jsp:usebean id = "ud" class = "userbn" >
              <jsp:setProperty name = "ud" property = "*" />
              </jsp:usebean>
              <ul>
              <li> name: <jsp:getProperty name = "ud" property = "name" />
              <li> email : <jsp:getProperty name = "ud" property = "email" />
              </ul>
              </body>
              <html>
              here is my bean :
              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
              import java.io.*;
              public class userbn implements Serializable
                   private String name ;
                   private String email;
                   public void setName(String n)
                        name = n;
                   public void setEmail(String e)
                        email = e;
                   public String getName()
                        return name;
                   public String getEmail()
                        return email;
                   public userbn(){}
              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
              pls help me.
              Thanks
              sravana.
              

              You realy can do it like Xiang says, but the better way is to use packages. That's
              the way BEA is designed for. If you use packages you can but your bean classes
              in every subfolder beneath Classes. Here for example we have the subfolders test
              and beans:
              You have to declare the package on top of your Bean Source Code:
              package test.beans;
              In your JSP you don't need the import code of Xiang. You only have to refer the
              path of your bean class:
              <jsp:useBean id="testBean" scope="session" class="test.beans.TestBean" />
              There are some other AppServers that only can deploy Java Beans in packages. So
              if you use packages you are always on the right side.
              ciao bernd
              "sravana" <[email protected]> wrote:
              >
              >Thank you very much Xiang Rao, It worked fine.
              >Thanks again
              >sravana.
              >
              >"Xiang Rao" <[email protected]> wrote:
              >>
              >><%@ page import="userbn" language = "java" contentType = "text/html"
              >>%> should
              >>work for you.
              >>
              >>
              >>"sravana" <[email protected]> wrote:
              >>>
              >>>HI ,
              >>>
              >>>I am using weblogic6.0 sp1.
              >>>
              >>>i have problem with jsp and java beans.
              >>>
              >>>i am using very simple java bean which stores name and email
              >>>
              >>>from a html form.
              >>>
              >>>but i am getting following errors:
              >>>
              >>>________________________________________________________________
              >>>
              >>>Full compiler error(s):
              >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
              >>>cannot resolve symbol
              >>>symbol : class userbn
              >>>location: class jsp_servlet._savename2
              >>> userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
              >>> ^
              >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:89:
              >>>cannot resolve symbol
              >>>symbol : class userbn
              >>>location: class jsp_servlet._savename2
              >>> userbn ud = (userbn) //[ /SaveName2.jsp; Line: 7]
              >>> ^
              >>>D:\bea4\wlserver6.0sp1\config\mydomain\applications\DefaultWebApp_myserver\WEB-INF\_tmp_war_myserver_myserver_DefaultWebApp_myserver\jsp_servlet\_savename2.java:94:
              >>>cannot resolve symbol
              >>>symbol : class userbn
              >>>location: class jsp_servlet._savename2
              >>> ud = (userbn) java.beans.Beans.instantiate(getClass().getClassLoader(),
              >>>"userbn"); //[ /SaveName2.jsp; Line: 7]
              >>> ^
              >>>3 errors
              >>>
              >>>____________________________________________________________
              >>>
              >>>in which directory should i place java bean source file(.java file)
              >>>
              >>>here is my jsp file:
              >>>--------------------------------------------------------
              >>>
              >>><%@ page language = "java" contentType = "text/html" %>
              >>><html>
              >>><head>
              >>><title>bean2</title>
              >>></head>
              >>><body>
              >>><jsp:usebean id = "ud" class = "userbn" >
              >>><jsp:setProperty name = "ud" property = "*" />
              >>></jsp:usebean>
              >>><ul>
              >>><li> name: <jsp:getProperty name = "ud" property = "name" />
              >>><li> email : <jsp:getProperty name = "ud" property = "email" />
              >>></ul>
              >>></body>
              >>><html>
              >>>
              >>>-------------------------------------------------------------
              >>>
              >>>here is my bean :
              >>>
              >>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
              >>>
              >>>import java.io.*;
              >>>
              >>>public class userbn implements Serializable
              >>>{
              >>>
              >>>     private String name ;
              >>>
              >>>     private String email;
              >>>
              >>>     public void setName(String n)
              >>>     {
              >>>
              >>>          name = n;
              >>>     }
              >>>
              >>>     public void setEmail(String e)
              >>>     {
              >>>
              >>>          email = e;
              >>>     }
              >>>
              >>>     public String getName()
              >>>     {
              >>>
              >>>          return name;
              >>>     }
              >>>
              >>>     public String getEmail()
              >>>     {
              >>>
              >>>          return email;
              >>>     }
              >>>
              >>>     public userbn(){}
              >>>}
              >>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
              >>>
              >>>pls help me.
              >>>Thanks
              >>>sravana.
              >>>
              >>
              >
              

  • An error in jsp page useBean when i try to include the java bean package?

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    m.ananthu Regards,
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    You cannot pair your iPod to a cell phone, so forget about it.
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    Hi,
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    > I'm new to J2EE world. I want to know how should I
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    ~

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