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Display related records from the database when we click the show all link through JDBC
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Satyapriya Nayak
5y
10.5k
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4
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Article
Introduction
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 pathname 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'
?>
<!--
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.
--
>
<!-- Note: A "Server" is not itself a "Container", so you may not
define subcomponents such as "Valves" at this level. Documentation at /docs/config/server.html
--
>
<?
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.
--
>
<!-- Note: A "Server" is not itself a "Container", so you may not
define subcomponents such as "Valves" at this level.
Documentation at /docs/config/server.html
--
>
<
Server
port
=
"8005"
shutdown
=
"SHUTDOWN"
>
<!--APR library loader. Documentation at /docs/apr.html -->
<
Listener
className
=
"org.apache.catalina.core.AprLifecycleListener"
SSLEngine
=
"on"
/>
<!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->
<
Listener
className
=
"org.apache.catalina.core.JasperListener"
/>
<!-- JMX Support for the Tomcat server. Documentation at /docs/non-existent.html -->
<
Listener
className
=
"org.apache.catalina.mbeans.ServerLifecycleListener"
/>
<
Listener
className
=
"org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"
/>
<!-- Global JNDI resources
Documentation at /docs/jndi-resources-howto.html
--
>
<
GlobalNamingResources
>
<!-- Editable user database that can also be used by
UserDatabaseRealm to authenticate users
--
>
<
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
>
<!-- A "Service" is a collection of one or more "Connectors" that share
a single "Container" Note: A "Service" is not itself a "Container",
so you may not define subcomponents such as "Valves" at this level.
Documentation at /docs/config/service.html
--
>
<
Service
name
=
"Catalina"
>
<!--The connectors can use a shared executor, you can define one or more named thread pools-->
<!--
<
Executor
name
=
"tomcatThreadPool"
namePrefix
=
"catalina-exec-"
maxThreads
=
"150"
minSpareThreads
=
"4"
/>
--
>
<!-- A "Connector" represents an endpoint by which requests are received
and responses are returned. Documentation at :
Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
Java AJP Connector: /docs/config/ajp.html
APR (HTTP/AJP) Connector: /docs/apr.html
Define a non-SSL HTTP/1.1 Connector on port 8080
--
>
<
Connector
port
=
"8081"
protocol
=
"HTTP/1.1"
connectionTimeout
=
"20000"
redirectPort
=
"8443"
/>
<!-- A "Connector" using the shared thread pool-->
<!--
<
Connector
executor
=
"tomcatThreadPool"
port
=
"8080"
protocol
=
"HTTP/1.1"
connectionTimeout
=
"20000"
redirectPort
=
"8443"
/>
--
>
<!-- Define a SSL HTTP/1.1 Connector on port 8443
This connector uses the JSSE configuration, when using APR, the
connector should be using the OpenSSL style configuration
described in the APR documentation --
>
<!--
<
Connector
port
=
"8443"
protocol
=
"HTTP/1.1"
SSLEnabled
=
"true"
maxThreads
=
"150"
scheme
=
"https"
secure
=
"true"
clientAuth
=
"false"
sslProtocol
=
"TLS"
/>
--
>
<!-- Define an AJP 1.3 Connector on port 8009 -->
<
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 --
>
<!-- You should set jvmRoute to support load-balancing via AJP ie :
<
Engine
name
=
"Standalone"
defaultHost
=
"localhost"
jvmRoute
=
"jvm1"
>
--
>
<
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) --
>
<!--
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
-->
<!-- The request dumper valve dumps useful debugging information about
the request and response data received and sent by Tomcat.
Documentation at: /docs/config/valve.html --
>
<!--
<Valve className="org.apache.catalina.valves.RequestDumperValve"/>
-->
<!-- This Realm uses the UserDatabase configured in the global JNDI
resources under the key "UserDatabase". Any edits
that are performed against this UserDatabase are immediately
available for use by the Realm. --
>
<
Realm
className
=
"org.apache.catalina.realm.UserDatabaseRealm"
resourceName
=
"UserDatabase"
/>
<!-- Define the default virtual host
Note: XML Schema validation will not work with Xerces 2.2.
--
>
<
Host
name
=
"localhost"
appBase
=
"webapps"
xmlValidation
=
"false"
xmlNamespaceAware
=
"false"
>
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html --
>
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn" />
-->
<!-- Access log processes all example.
Documentation at: /docs/config/valve.html --
>
<!--
<
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 a 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 > < font color =
'Red'
> EMP ID < /font></th >
<
th > < font color =
'Red'
> EMP NAME < /font></th >
<
th > < font color =
'Red'
> SALARY < /font></th >
<
th > < font color =
'Red'
> SHOW ALL < /font></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 > < b > < font color =
'#663300'
> <%=EmployeeId%> < /font></b > < /td> <
td > < b > < font color =
'#663300'
> <%=EmployeeName%> < /font></b > < /td> <
td > < b > < font color =
'#663300'
> <%=Salary%> < /font></b > < /td> <
td > < b > < font color =
'#663300'
> < a href =
'showall.jsp?id=<%=EmployeeName%>'
> Show All < /a></font > < /b></td >
<
/tr>
<%
}
%>
<
/table> <
/body> <
/html>
showall.jsp
<%@ page
import
=
"java.sql.*"
%>
<
html >
<
body bgcolor =
"Yellow"
>
<
table border =
"1"
width =
"30%"
height =
"30%"
>
<
tr >
<
th > < font color =
'Red'
> ID < /font></th >
<
th > < font color =
'Red'
> NAME < /font></th >
<
th > < font color =
'Red'
> ADDRESS < /font></th >
<
th > < font color =
'Red'
> DESIGNATION < /font></th >
<
th > < font color =
'Red'
> SALARY < /font></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 > < b > < font color =
'#663300'
> <%=EmployeeId%> < /font></b > < /td> <
td > < b > < font color =
'#663300'
> <%=EmployeeName%> < /font></b > < /td> <
td > < b > < font color =
'#663300'
> <%=EmployeeAddress%> < /font></b > < /td> <
td > < b > < font color =
'#663300'
> <%=Employeedesignation%> < /font></b > < /td> <
td > < b > < font color =
'#663300'
> <%=Salary%> < /font></b > < /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
Thanks for reading
Display related records from the database using JDBC
JDBC
JDBC tutorials
link in JDBC
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