Eclipse + Tomcat 5.5 + JDBC + Oracle 9

codeseeker — Thu, 26 Jun 2008 09:02:22 +0000

Pre-Condition

Read: “Developing Web applications with Tomcat and Eclipse” (IBM)

Setup Tomcat Management User

To use the Tomcat Management tools, you must create a user with “admin” and “manager” roles. To do this, follow these steps:

Open the tomcat-users.xml file in the CATALINA_home/conf directory with a text editor.
In this file, add the following entries to create the “admin” and “manager” roles:

In addition, add the following entry to create the “admin” user:

Save and close the file

Add JDBC driver support to Tomcat

Download the latest JDBC Driver from Oracle (e.g. here)
Copy jar to $CATALINA_HOME/common/lib

Add a context.xml file to the Application’s META-INF directory:

... name="jdbc/myoracle" auth="Container" type="javax.sql.DataSource" factory="org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory" driverClassName="oracle.jdbc.OracleDriver" username="<>" password="<>" url="jdbc:oracle:thin:@<>:<>:<>" maxWait="-1" maxActive="20" maxIdle="10" validationQuery="SELECT 1+1 from dual"/> ...

Add the resource-ref tag to the Application’s WEB-INF directory (not mandatory):

… Oracle Datasource jdbc/myoracle javax.sql.DataSource Container

Add JDBC-Example code to Servlet-Example:

Context initContext; try { initContext = new InitialContext(); Context envContext = (Context)initContext.lookup("java:/comp/env"); DataSource ds = (DataSource)envContext.lookup("jdbc/myoracle"); Connection conn = ds.getConnection();DatabaseMetaData meta = conn.getMetaData(); response.getWriter().write(""); response.getWriter().write("Driver Name : "+meta.getDriverName()+" "); response.getWriter().write("Driver Version : "+meta.getDriverVersion()+" "); Statement statement = conn.createStatement(); String query = "select * from LOGIN_USER"; // ResultSet resultSet = statement.executeQuery(query); // while (resultSet.next()) { response.getWriter().write(resultSet.getString(2)+" "); } // close connection conn.close(); conn = null;

See also: Tomcat JNDI Datasource Examples

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Eclipse + Tomcat 5.5 + JDBC + Oracle 9