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Trouble in retrieving data from the mysql database using JSTL

 
Greenhorn
Posts: 4
Netbeans IDE Java
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Hi,
I am a newbie in using JSTL, so got stuck on a code where I need to retrieve the datas from a database without using any scripting code. I am using NetBEans IDE and mysql. I am using a user created database named as 'mydatabase' and a table named as 'events' which contains a column 'events' with lots of data in it.
So, the sql command Select events from mydatabase.events works fine.
A piece of my work goes below...is it made in an amaturish fashion?


Somehow, I keep receiving the exception message after the jsp page(sqlTest.jsp) is run.
The exception msg is:
javax.servlet.ServletException: javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/mydatabase"
and the root cause is:
javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/mydatabase"

However, I have imported the jar file MySQL JDBC Driver from the IDE's library to my project. The jar does contain the package com.mysql.jdbc with the Driver.class file. I also have the JSTL 1.1 and the standard.jar in my project. So everything is in place and I really dont know whats going wrong. The funny part is, the code works properly with the Derby database and its driver. So whats wrong with mysql's Driver???
 
Ranch Hand
Posts: 147
Eclipse IDE Tomcat Server Debian
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You mentioned importing the mysql driver into your project - is that driver also exported into your WAR file's WEB-INF/lib folder?
 
Sanjeev Das
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Netbeans IDE Java
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Hi,
thanks for the reply...appreciate that.
Oops, even by importing the mysql.jar into the WEB-INF/lib folder dsnt help...got the same exception.

 
Sanjeev Das
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Netbeans IDE Java
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Any clues bout the issue... will b appreciated.
 
Greenhorn
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i have the same problem.
i am using eclipse on ubuntu.
i did the same things but still error is there
any solution.?

My code

<%@ page language="java" import="java.lang.Class" %>
<%@ page language="java" import="java.sql.*" %>

<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jstl/sql" prefix="sql"%>

<sql:setDataSource var="dataSource" driver="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/student" user="root" password="innovate" />
<html>
<head>
<title>Query Example</title>
</head>
<body>
<sql:query var="users" dataSource="$dataSource">
select * from personal;
</sql:query>
<table>
<c:forEach var="row" items="$users">
<tr>
<td><c:out value="$row.uname" /></td>
<td><c:out value="$row.fname" /></td>
<td><c:out value="$row.lname" /></td>
<td><c:out value="$row.city" /></td>
<td><c:out value="$row.mobile" /></td>
</tr>
</c:forEach>
</table>
</body>
</html>


I got the following errors:


javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "java.sql.SQLException: No suitable driver found for $dataSource"
at org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.getConnection(QueryTagSupport.java:314)
at org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.doStartTag(QueryTagSupport.java:197)
at org.apache.taglibs.standard.tag.el.sql.QueryTag.doStartTag(QueryTag.java:123)
at org.apache.jsp.New_jsp._jspx_meth_sql_query_0(New_jsp.java from :140)
at org.apache.jsp.New_jsp._jspService(New_jsp.java from :82)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:406)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:483)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:373)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:662)
Selection_004.png
[Thumbnail for Selection_004.png]
Selection_005.png
[Thumbnail for Selection_005.png]
 
author
Posts: 5856
7
Android Eclipse IDE Ubuntu
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Try removing the dataSource="$dataSource" from the sql:query statement because, based on the error message, it appears that $datasource is not set. I don't think you need to specify a datasource for your sql statements if your code declares only one.
 
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