Jsp and database

I am new to jsp can anyone tell me what is the best way to connect to database like should I created on java class for that and import it into the jsp

Yes thats what I do, but set it up to use connection pooling, I am in the process of changing my code to do this and its a bit of a pain, it would be worth you getting it right first time!

Similar Messages

Please help with jsp and database!!

Hello,
i first created a jsp page and printed out the parameters of a user's username when they logged in. example, "Welcome user" and it worked fine...
i inserted a database into my site that validates the username and password, and ever since i did that in dreamweaver, when a user logs in sucessfully, it returns the jsp page like its supposed to, only that it says "Welcome null" instead of "Welcome John." pretty strange, huh!? can anyone please help? thanks!
here is the important part of the code to Login.jsp, and LoginSuccess.jsp: <%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" %>
<%@ include file="Connections/Login.jsp" %>
<%
// *** Validate request to log in to this site.
String MM_LoginAction = request.getRequestURI();
if (request.getQueryString() != null && request.getQueryString().length() > 0) MM_LoginAction += "?" + request.getQueryString();
String MM_valUsername=request.getParameter("Username");
if (MM_valUsername != null) {
String MM_fldUserAuthorization="";
String MM_redirectLoginSuccess="LoginSuccess.jsp";
String MM_redirectLoginFailed="LoginFailure.jsp";
String MM_redirectLogin=MM_redirectLoginFailed;
Driver MM_driverUser = (Driver)Class.forName(MM_Login_DRIVER).newInstance();
Connection MM_connUser = DriverManager.getConnection(MM_Login_STRING,MM_Login_USERNAME,MM_Login_PASSWORD);
String MM_pSQL = "SELECT UserName, Password";
if (!MM_fldUserAuthorization.equals("")) MM_pSQL += "," + MM_fldUserAuthorization;
MM_pSQL += " FROM MemberInformation WHERE UserName=\'" + MM_valUsername.replace('\'', ' ') + "\' AND Password=\'" + request.getParameter("Password").toString().replace('\'', ' ') + "\'";
PreparedStatement MM_statementUser = MM_connUser.prepareStatement(MM_pSQL);
ResultSet MM_rsUser = MM_statementUser.executeQuery();
boolean MM_rsUser_isNotEmpty = MM_rsUser.next();
if (MM_rsUser_isNotEmpty) {
    // username and password match - this is a valid user
    session.putValue("MM_Username", MM_valUsername);
    if (!MM_fldUserAuthorization.equals("")) {
      session.putValue("MM_UserAuthorization", MM_rsUser.getString(MM_fldUserAuthorization).trim());
    } else {
      session.putValue("MM_UserAuthorization", "");
    if ((request.getParameter("accessdenied") != null) && false) {
      MM_redirectLoginSuccess = request.getParameter("accessdenied");
    MM_redirectLogin=MM_redirectLoginSuccess;
MM_rsUser.close();
MM_connUser.close();
response.sendRedirect(response.encodeRedirectURL(MM_redirectLogin));
return;
%>
      <form action="<%=MM_LoginAction%>" method="get" name="Login" id="Login">
        <table width="55%" border="0">
          <tr>
            <td width="41%">Username </td>
            <td width="59%"><input name="Username" type="text" id="Username" value="" size="25" maxlength="10"></td>
          </tr>
          <tr>
            <td>Password </td>
            <td><input name="Password" type="password" id="Password" value="" size="25" maxlength="10"></td>
          </tr>
          <tr>
            <td> </td>
            <td><input type="submit" name="Submit" value="Submit"></td>
          </tr>
        </table>
      </form>And LoginSuccess.jsp where i want it to print out the "Welcome username
         <%String Name=request.getParameter("Username");
     out.println ("Welcome ");
     out.println (Name); %>

<%@ page contentType="text/html; charset=iso-8859-1"
language="java" import="java.sql.*" %>
<%@ include file="Connections/Login.jsp" %>
<%
// *** Validate request to log in to this site.
String MM_LoginAction = request.getRequestURI();
if (request.getQueryString() != null &&
request.getQueryString().length() > 0) MM_LoginAction
+= "?" + request.getQueryString();
String
MM_valUsername=request.getParameter("Username");
if (MM_valUsername != null) {
String MM_fldUserAuthorization="";
String MM_redirectLoginSuccess="LoginSuccess.jsp";
String MM_redirectLoginFailed="LoginFailure.jsp";
String MM_redirectLogin=MM_redirectLoginFailed;
Driver MM_driverUser =
=
(Driver)Class.forName(MM_Login_DRIVER).newInstance();
Connection MM_connUser =
=
DriverManager.getConnection(MM_Login_STRING,MM_Login_US
RNAME,MM_Login_PASSWORD);
String MM_pSQL = "SELECT UserName, Password";
if (!MM_fldUserAuthorization.equals("")) MM_pSQL +=
= "," + MM_fldUserAuthorization;
MM_pSQL += " FROM MemberInformation WHERE
E UserName=\'" + MM_valUsername.replace('\'', ' ') +
"\' AND Password=\'" +
request.getParameter("Password").toString().replace('\'
, ' ') + "\'";
PreparedStatement MM_statementUser =
= MM_connUser.prepareStatement(MM_pSQL);
ResultSet MM_rsUser =
= MM_statementUser.executeQuery();
boolean MM_rsUser_isNotEmpty = MM_rsUser.next();
if (MM_rsUser_isNotEmpty) {
// username and password match - this is a valid
lid user
session.putValue("MM_Username", MM_valUsername);
if (!MM_fldUserAuthorization.equals("")) {
session.putValue("MM_UserAuthorization",
ion",
MM_rsUser.getString(MM_fldUserAuthorization).trim());
} else {
session.putValue("MM_UserAuthorization", "");
if ((request.getParameter("accessdenied") != null)
ll) && false) {
MM_redirectLoginSuccess =
ess = request.getParameter("accessdenied");
MM_redirectLogin=MM_redirectLoginSuccess;
MM_rsUser.close();
MM_connUser.close();
response.sendRedirect(response.encodeRedirectURL(MM_re
irectLogin));
return;
%>
<form action="<%=MM_LoginAction%>" method="get"
"get" name="Login" id="Login">
<table width="55%" border="0">
<tr>
<td width="41%">Username </td>
<td width="59%"><input name="Username"
="Username" type="text" id="Username" value=""
size="25" maxlength="10"></td>
</tr>
<tr>
<td>Password </td>
<td><input name="Password" type="password"
="password" id="Password" value="" size="25"
maxlength="10"></td>
</tr>
<tr>
<td>�</td>
<td><input type="submit" name="Submit"
me="Submit" value="Submit"></td>
</tr>
</table>
</form>
And LoginSuccess.jsp where i want it to print out the
"Welcome username
         <%String Name=request.getParameter("Username");
     out.println ("Welcome ");
     out.println (Name); %>When the page is rediredted u r not passing the user name in the query string,so it is not availble in the query string for LoginSuccess page
Since u have added user in session user this
<%String Name=(String)session.getValue("MM_Username") ;%>
<%     out.println ("Welcome ");
<%      out.println (Name); %>

JSP and Database code

Hi All,
To start of I'm just a beginner to JSP.
I've made some JSP pages that get some database info, all works fine but
I do have the database code in the JSP page. And I know that this is not the
ideal method.
I've read that the database code should be seperate from the JSP code, but
how would I do this? Are there any tutorials on the net on how?
Thanks for any help!

Use MVC architecture. There are lot of tutorials available. One of them are in
http://www.javaworld.com/javaworld/jw-12-1999/jw-12-ssj-jspmvc.html

Beginning Programmer needs help - JSP and databases?

1. I have never used JSP before, but have been given an assignment to create a webpage to query a database. The database is in Access. Does anyone have a snipet of code in JSP that will query an MS Access database. Is there a function that I can use and pass it an SQL (select statement) and have it return a list of results.
-OR-
If there is a way for JSP to transform the MS Access database into a text file that would be good also.
2. Has anyone created a search functionaly using JSP (or know of a tool) that can search documents, PDF files, HTML files, etc.
Thank you for any help!

hi , there is no big deal in JSPs, Servlets, EJBs e.t.c its olnly a matter of committing time and getting urself familar and in areas where you have problems this forum is a nice place for you to share all what u have.
to start with i will give you some sites where you can start learning jsps, servlets, ejbs and the rest.
1) http://java.sun.com/j2ee -> look for JSPs , Servlets, EJB, JavaBeans e.t.c
2) http://www.jspinsider.com
3) http://www.coreservlets.com
4) http://www.jakarta.apache.com (download tomcat for your container)
for databases u can use this code snippet but u will have to read more about databases to be able to chagne some things in this snipper such as your database username, password , url and the rest.
     <%@page import="java.sql.*" %>
     try
        Class.forName ("sun.jdbc.odbc.JdbcOdbcDriver");
        Connection con = DriverManager.getConnection ("jdbc:odbc:test_dsn", "sa", "");
     Statement stat = con.createStatement ();
     ResultSet res = stat.executeQuery("select * from authors");
     while (res.next())
          //process the results of this query
     catch (Exception e)
        //process this also
%>
You will need to become farmilar with the java programming language and also database conventions so you have a proper understanding.
study those db codes and modify to suit your needs.
buzz on me in case you are stuck.
Regards

JSP and Database connectivity

Hello!
I have Tomcat 4.0. and my database file is in Access (emp.mdb)
I want to connect this Data file from JSP, for that any Driver I have to
install? like JDBC driver...
What is the steps and How do I connect? Pl. reply me.
Thax,
regards
mohan

Dear Amn,
I am giving sample program. Just change the emp.mdb file path and run this jsp program.
Then you can see the driver information etc.,
if you get any problem, please call me at [email protected]. then i will give u solution assp.
Thank you very much.
all the best.
Yours
Rajesh
<title>Database Test</title>
<font face="verdana" size=2 color="blue">
<%@page import="java.sql.*"%>
<%
     Connection con=null;
     Statement st=null;
     try
          Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          con = DriverManager.getConnection("jdbc:odbc:Driver={MicroSoft Access Driver (*.mdb)};DBQ=C:/emp.mdb","","");
          st=con.createStatement();
          out.println("Connected To Database ");
          out.println("<BR><BR>");
          DatabaseMetaData md = con.getMetaData();
          out.println("Driver Name " + md.getDriverName());
          out.println("<BR><BR>");
          out.println("Driver Version " + md.getDriverVersion());
          out.println("<BR><BR>");
          out.println("Database URL is " + md.getURL());
          out.println("<BR><BR>");
          out.println("Database UserName is " + md.getUserName());
          out.println("<BR><BR>");
          out.println("Connection Name " + md.getConnection());
          out.println("<BR><BR>");
          out.println("Database Name " + md.getDatabaseProductName());
          out.println("<BR><BR>");
          out.println("Database Version " + md.getDatabaseProductVersion());
          out.println("<BR><BR>");
          out.println("Database ReadOnly Type " + md.isReadOnly());
          out.println("<BR><BR>");
          out.println("MaxColumnNameLength " + md.getMaxColumnNameLength());
          out.println("<BR><BR>");
          out.println("MaxConnections " + md.getMaxConnections());
          out.println("<BR><BR>");
          out.println("");
catch(Exception e)
     out.println(e);
     finally
          try {
               if(st != null) {
                    st.close();
                    st = null;
               if(con != null) {
                    con.close();
                    con = null;
          } catch (SQLException e) {}
%>

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

Jsp and databases

hello i currently have a jsp page that displays a order number to collect order information.
The current order number is achived by looking at the previous order number from the database and incrementing 1. The current order number is inserted into the database straight away.
The problem iam finding is that how should i handle the problem when someone presses the back button in the web browser, this will leave an order number opened in the database without the sumitted order numbers?
thanks

Ahh - the classic problem of assigning ids to things.
So what you are saying is you assign the id when they ENTER the order page, but they leave the page without saving the order, thus you end up with a 'dummy' record in the database - an id, but no good info with it.
Couple of approaches I can think of
1 - mark the record as unsaved to begin with, then mark it as saved when the page is submitted successfully. You can then routinely go in and clean out all the 'unsaved' orders. Requires another database field, and you also might have to alter code elsewhere to filter out the unwanted orders.
This will result in skipped order numbers every time the user 'cancels' saving an order. Are sequential order numbers important to you?
2 - have a 'pool' of unassigned ids - eg the next 10. Issue them to the user pages on demand. If it doesn't get used in the next 'x' minutes (eg session timeout) issue it again somehow? I dunno - this solution sounds quite complex.
The only other thing I can think of is to change the time you are assigning the order id to when the user actually saves the order - a whole different kettle of fish. What database are you using? Some support the generation of sequence numbers etc.

JDeveloper10g - JSP and Database connectivity sample please

Please someone send me a sample JSP page develped in JDeveloper10g.<br> It should create a connection (like <database:dbOpen connId="conn1" user="scott" password="tiger" dataSourcee=??> )<br>
Is dataSource="jdbc:oracle:thin:@121.100.110.7:1521:ORCL" allowed.<br>

You can use this tutorial:
http://download.oracle.com/docs/cd/B25329_01/doc/appdev.102/b25320/querdata.htm#sthref445
However if you are looking for an easier way of doing these type of applications try one of the ADF tutorials.

Hi guys Pls tell me a way to connect db4 database with jsp and which driver

hi guys
Pls tell me a way to connect db4 database with jsp and
also tell me which driver i have to use
also tell me how to connect with excel sheets

take a look at the follwing links. There, you'll find all what you need :
DB4:
http://www.oracle.com/database/berkeley-db/je/index.html
http://www.oracle.com/technology/products/berkeley-db/je/index.html
http://www.oracle.com/database/berkeley-db/db/index.html
http://www.oracle.com/database/docs/berkeley-db-je-datasheet.pdf
Excel:
http://64.18.163.122/rgagnon/javadetails/java-0516.html
Hope That Helps

Problem with JSP and Java Servlet Web Application....

Hi every body....
I av developed a web based application with java (jsp and Java Servlets)....
that was working fine on Lane and Local Host....
But when i upload on internet with unix package my servlets and Java Beans are not working .....
also not access database which i developed on My Sql....
M using cpanel support on web server
Plz gave me solution...
Thanx looking forward Adnan

You need to elaborate "not working" in developer's perspective instead of in user's perspective.

Tree View through JSP and Java Script

Hi,
I am looking for code or ideas of a Tree Structure as shown in in the left side frame of admin console of Sun App server 7 on the browser. I need to create a tree structure which will work on the browser like it works on the Sun App Server 7 admin console. If you had any idea or code, please share with me. I would like to have some idea before I start building it. The tree will be build from the database. So any database design is also helpful. I am planning to have that tree using JSP and EJB.
Please help. If you are not clear what I am looking for, then please drop a line in this forum, so that I can explain it fine.
Thanks in advance.
Amit

You can use the JSP Tree Tag I have developed. This helps you both structuring the tree model itself + it takes care of displaying the tree in a nice way. You can change all HTML code used to display the tree. Also you can build trees dynamically instead of just displaying static trees. Take a look at it here:
http://www.jenkov.dk/projects/treetag/treetag.jsp
Kind Regards,
Jakob Jenkov

Need help in JSP and Servlets

Hi friends,
[please forgive me if i am posting this in the wrong forum, all seems same to a fresher]
Now, to my problem..i need a suggestion, a way or a method to implement the following!
I am supposed to create a servlet that reads data from oracle database. Once i retrive the data (for example: 6 rows of a table having 4 attributes), i am supposed to pass this data to a JSP page where the data has to be formatted and displayed properly. If i call the same servlet from a different JSP, i should be able to access the data in that JSP and format it in a different way. How do i pass the data to JSP? what method i can use to achieve this task?
Note: I already know about PrintWriter pw = response.getWriter(); and then printing the formated HTML page..but i want to keep the formatting to JSP part and send only the data part that i can access in JSP
Thanks in adavance

arun_ramachandran wrote:
[please forgive me if i am posting this in the wrong forum, all seems same to a fresher]Then you should learn to be more observant - after all, we have JSP and Servlet fora, further down the list. :)
I am supposed to create a servlet that reads data from oracle database. Once i retrive the data (for example: 6 rows of a table having 4 attributes), i am supposed to pass this data to a JSP page where the data has to be formatted and displayed properly. If i call the same servlet from a different JSP, i should be able to access the data in that JSP and format it in a different way. How do i pass the data to JSP? what method i can use to achieve this task? You can store the data in your session object. You can even use JavaBeans and the jsp:usebean tag.
[http://java.sun.com/products/jsp/tags/11/syntaxref11.fm14.html]
Note: I already know about PrintWriter pw = response.getWriter(); and then printing the formated HTML page..but i want to keep the formatting to JSP part and send only the data part that i can access in JSPA wise approach - I wish more prople woiuld be as thoughtful.

Jsp and javascript problem

I have a JSP page with a table of n rows. Each row has the option of having
          a dropdown list appear on that particular row. The user should have the
          ability to make a selection from the drop down list and have the page change
          to the correct page automatically or it can allow the user to change and
          have them click on a link that passes the value of the select box as a
          parameter to the proper page.
          The problem is that each row CAN NOT be in it's own form. The action for
          the current form is NOT the action I want the select box to use.
          I can't seem to figure out how to get the value of the select box in
          javascript passed as a parameter using a JSP variable.
          Example code:
          <form method="post" action="/index.jsp">
          <table>
          <tr>
          <td> Remove Row? </td>
          <td> View Options? </td>
          <td> Name </td>
          </tr>
          <tr>
          <td> <input type=checkbox name='<%=rowNumber %>' value='<%=
          someCheckboxValue %>'> </td>
          <td> <select name=selectOptions>
          <option value="option 1">option1</option>
          <option value="option 2">option2</option>
          <option value="option 3">option 3</option>
          </select>
            View Option
          </td>
          <td> <%= rowName %> </td>
          </tr>
          <tr>
          <td colspan="3"> <input type=button name='UpdateExampleForm'
          value='Submit'> </td>
          </tr>
          </table>
          </form>


actually i am taking menus from database in file ourmenu.jsp
and i have another file called menu.js which displays the menus on browser
menu.js is the file which i have downloaded from net
and i want to use at it is but with a difference that it should display the menus which r coming from database
in file ourmenu.jsp i have saved the menus in array so can anyone tell me how to refer them in my .js file.
i have tried with foll. code::
var aUsername =new array();
<% i=0;
while (padtemp[i] != null)
%>
aUsername[<%= ++i%>] = "<%= padtemp[i] %>";
in .js file but i am getting no o/p on browser
i have tried with runat=server while including the .js file in .jsp file but its not working too.
can anyone help please
thanks in advance

COMMIT problem in TopLink, Struts, JSP and ADF Databinding sample

In the sample Developing a J2EE Application using TopLink, Struts, JSP and ADF Databinding,
I followed all the steps to build a department browse page and a edit page.
But when I get to Step number 23 in "Create a JSP to Edit Departments" I have a problem with the commit.
Only after I make a change in the form and click the sumbit button, the commit and rollback buttons become active. And After I click the commit button the data gets commited to the database but the page inofmation changes to the very first department record, not the current one.
How do I make those buttons active with out the extra click on the submit?
After I click the commit button, how do I keep the current data on the screen?
Thanks for you help.

Shay,
Thanks for the reply.
For #1, I was able to do the following and get away with not having to press submit first. I just removed the bindings for disable. I hope that does not cause any problems?
<input type="submit" name="event_Commit" value="Commit" />
<input type="submit" name="event_Rollback" value="Rollback" />
For #2, How I add an action on an HTML button? My UIModel.xml for the edit department page currently has two actions on it. Commit and RollBack. Is it linked through the "name" attribute of the input tag?

How to use taglibs in JSP for Database access

Hi
Could any one please tell me how to use taglibs in JSP for Database access
with regrds
Jojo

This is a sample how to connect to a MySQL database with JSTL 1.0:
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
<%@ taglib uri="http://java.sun.com/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>JSTL MySQL</title>
<link href="styles.css" rel="stylesheet" type="text/css" />
</head>
<body>
<c:catch var="e">
<sql:setDataSource var="datasource" url="jdbc:mysql://Your_Server_Name_Here/You_Schema_Here"
                       user="Your_Username_Here" password="Your_Password_Here"
                       driver="com.mysql.jdbc.Driver"/>
<c:out value="datasource= ${datasource}, Class = ${driver.class}"/>
<br />
<br />
<sql:query var="deejays" dataSource="${datasource}">SELECT * FROM Your_Table_Name_Here</sql:query>
<table>
<%-- Get the column names for the header of the table --%>
<c:forEach var="columnName" items="${deejays.columnNames}"><th><c:out value="${columnName}"/></th></c:forEach>
<tbody>
<%-- Get the value of each column while iterating over rows --%>
<c:forEach var="row" items="${deejays.rows}">
<tr><c:forEach var="column" items="${row}">
        <td><c:out value="${column.value}"/></td>
      </c:forEach>
</tr>
</c:forEach>
</tbody>
</table>
</c:catch>
<br />
<br />
<c:if test="${e!=null}"><span class="error">Error</span>�
<c:out value="${e}" />
</c:if>
</body>
</html>And this thread might help you:
http://forum.java.sun.com/thread.jspa?threadID=639471&tstart=44

Jsp and database

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