I have a MySQL database in which I created a database named, javatest,
and I am using Tomcat 5.5.9. I have unable to connect my database using
Java's DataSource method. Here is my ROOT.xml setup for my application
context:
<Context path="" docBase="/home/tomcat/applications/"
debug="0" reloadable="true" >
<Resource name="jdbc/DBTest" type="javax.sql.DataSource"
auth="Container" />
<ResourceParams name="jdbc/DBTest">
<parameter>
<name>username</name>
<value>javauser</value>
</parameter>
<parameter>
<name>password</name>
<value>javadude</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>com.mysql.jdbc.Driver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:mysql://localhost/javatest?autoReconnect=true</value>
</parameter>
</ResourceParams>
</Context>
I created a simple servlet to test the database connection:
public class TestSQL extends HttpServlet {
private Connection conn = null;
public void doGet(HttpServletRequest request,
HttpServletResponse response) throws IOException,
ServletException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
try {
Context ctx = new InitialContext();
Context appContext = (Context)ctx.lookup("java:comp/env");
DataSource ds = (DataSource)appContext.lookup("jdbc/DBTest");
conn = ds.getConnection();
} catch (Exception e) {
e.printStackTrace();
}
if (conn != null) {
out.println("Connection successful");
} else {
out.println("Unsuccessful");
}
}
It prints out "Unsuccessful". I also tried using the traditional
DriverManager and that works. Here is my web.xml in case it is needed
for analysis:
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app version="2.4" uri="http://java.sun.com/xml/ns/j2ee"; >
<resource-ref>
<res-ref-name>jdbc/DBTest</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
<servlet>
<servlet-name>TestSQL</servlet-name>
<servlet-class>TestSQL</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TestSQL</servlet-name>
<url-pattern>/servlet/TestSQL</url-pattern>
</servlet-mapping>
</web-app>
I would appreciate it very much if someone can have a look at this and
tell me what I am doing wrong with the DataSource alternative.
Michael.
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