Display related records from the database when we click the show all link through JDBC

Satyapriya Nayak
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Here we produce two jsp pages, in first the first (Display.jsp) it contains some data with a show all link. When the user clicks on that link, all related data of that link will be displayed in the second jsp page (showall.jsp).

Creation of a context file

Create any folder in any drive as (E:\Jsp). Inside that folder store your .jsp files. Give the Context path name as jsp and docBase as E:\Jsp, here docBase means the total path where we are storing our .jsp files. These changes are done in the server.xml file, which is present in (E:\Program Files\Apache Software Foundation\Tomcat 6.0\conf) directory.

Server.xml file

<?xml version='1.0' encoding='utf-8'?>



<?xml version='1.0' encoding='utf-8'?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with

this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->

<Server port="8005" shutdown="SHUTDOWN">

<Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />

<Listener className="org.apache.catalina.core.JasperListener" />

<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" />
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />

<GlobalNamingResources>
 
 <Resource name="UserDatabase" auth="Container"
 type="org.apache.catalina.UserDatabase"
 description="User database that can be updated and saved"
 factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
 pathname="conf/tomcat-users.xml" />
</GlobalNamingResources>


<Service name="Catalina">
 
 

 
 <Connector port="8081" protocol="HTTP/1.1"
 connectionTimeout="20000"
 redirectPort="8443" />
 
 
 
 

 
 <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

 <!-- An Engine represents the entry point (within Catalina) that processes
 every request. The Engine implementation for Tomcat stand alone
 analyzes the HTTP headers included with the request, and passes them
 on to the appropriate Host (virtual host).

Documentation at /docs/config/engine.html -->
 
 <Engine name="Catalina" defaultHost="localhost">

 <!--For clustering, please take a look at documentation at:

/docs/cluster-howto.html (simple how to)
 /docs/config/cluster.html (reference documentation) -->
 

 
 

 
 <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
 resourceName="UserDatabase"/>

 
 <Host name="localhost" appBase="webapps"

 xmlValidation="false" xmlNamespaceAware="false">

<!--
 <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
 prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/>
 <Context path="/jsp" docBase="E:\Jsp" reloadable="true" debug="0" />
 </Host>
 </Engine>
</Service>
</Server>

Table creation

First create an employee table in Oracle and insert some data as below

Create table employee(empid varchar(50),empname varchar(50),empaddress varchar(50),designation varchar(50),salary int)

insert into employee values('E001','Raj','Delhi','Clerk',10000)
insert into employee values('E002','Harry','Mumbai','Player',20000)
insert into employee values('E003','Sunil','Noida','Producer',30000)
insert into employee values('E004','Pollock','Durban','Manager',40000)
insert into employee values('E005','Jonty','Perth','Director',50000)
insert into employee values('E006','Kallis','Oslo','Dean',60000)
insert into employee values('E007','Imran','Dubai','Admin',70000)

Creation of dsn (database source name)

Start-Control panel- Administrative Tools- Data Sources (ODBC)-go to system dsn tab-click add button-select a driver for which you want to set up data source (for Oracle- Oracle in XE)-select it and click finish-give any name in data source name textbox-then click ok button.
Note:- Here Username=system, Password=pintu and Dsn name=dsn1

Display.jsp

<%@ page import="java.sql.*" %>
<html>
<body bgcolor="Yellow">
<table border="1" width="30%" height="30%">
<tr>
<th>EMP ID</th>
<th>EMP NAME</th>
<th>SALARY</th>
<th>SHOW ALL</th>
</tr>
<%
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:dsn1","system","pintu");
Statement stmt=con.createStatement();
ResultSet rs=stmt.executeQuery("select * from employee");
while(rs.next())
{
 String EmployeeId=rs.getString("empid");
 String EmployeeName=rs.getString("empname");
 String EmployeeAddress=rs.getString("empaddress");
 String Employeedesignation=rs.getString("designation");
 int Salary=rs.getInt("salary");

%>
<tr>
<td><%=EmployeeId%></td>
<td><%=EmployeeName%></td>
<td><%=Salary%></td>
<td><a href='showall.jsp?id=<%=EmployeeName%>'>Show All</a></td>

</tr>
<%
}
%>

</table>
</body>
</html>

showall.jsp

<%@ page import="java.sql.*" %>
<html>
<body bgcolor="Yellow">

<table border="1" width="30%" height="30%">
<tr>
<th>ID</th>
<th>NAME</th>
<th>ADDRESS</th>
<th>DESIGNATION</th>
<th>SALARY</th>

</tr>
<%
String empname= request.getParameter("id");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:dsn1","system","pintu");
Statement stmt=con.createStatement();
ResultSet rs=stmt.executeQuery("select * from employee where empname='"+empname+"'");
while(rs.next())
{
 String EmployeeId=rs.getString("empid");
 String EmployeeName=rs.getString("empname");
 String EmployeeAddress=rs.getString("empaddress");
 String Employeedesignation=rs.getString("designation");
 int Salary=rs.getInt("salary");
%>
<tr>
<td><%=EmployeeId%></td>
<td><%=EmployeeName%></td>
<td><%=EmployeeAddress%></td>
<td><%=Employeedesignation%></td>
<td><%=Salary%></td>
</tr>
<%
}
%>
</table>
</body>
</html>

Running the application

Run the tomcat then write the below link in the URL

http://localhost:8081/jsp/

Here jsp is the Context path, which we mentioned in the server.xml file, which is present in (E:\Program Files\Apache Software Foundation\Tomcat 6.0\conf) directory.

After giving the url a set a listing will come, here only two appears as Display.jsp and showall.jsp click on Display.jsp.

Output

jdbc

Thanks for reading

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