Article:
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Creating a Web Application with Ant and Tomcat 4
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| Subject: |
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Fixing Null pointer exception |
| Date: |
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2006-02-07 04:08:58 |
| From: |
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nav327
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Using Versions...
Tomcat 5.5.14, MySQL 5.0.18-nt, mysql-connector-java-3.1.12-bin.jar, win2k pro.
Problem........
When loading up address book application a null pointer exception occurs.
Fix.......
Open server.xml inside tomcat5.5\conf
***IMPORTANT**** STOP tomcat service before editing server.xml ********.
inside the tag <GlobalNamingResources>
insert the following....
<Resource name="jdbc/Public" auth="Container" type="javax.sql.DataSource"
maxActive="100" maxIdle="30" maxWait="10000"
username="root" password="mysqlpassword" driverClassName="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/public?autoReconnect=true"/>
Then edit the context.xml within the AddressBook application changing the Driver in the value tag.
<parameter>
<name>driverClassName</name>
<value>com.mysql.jdbc.Driver</value>
</parameter>
Restart Tomcat and reload AddressBook and cross fingers
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Showing messages 1 through 1 of 1.
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Fixing Null pointer exception...i forgot
2006-02-09 01:48:28
nav327
[View]
as follows....
before the closing tag for context (</context)
add
<ResourceLink global="jdbc/Public" name="jdbc/Public" type="javax.sql.DataSource"/>