The connection pool is configured on tomcat {connect error=name [Jdbc/oracledb] is not bound in the this Context. Unable to find [JDBC]}

. During the learning period, I never practiced the connection pooling on Tomcat, and today I finally realized it once, playing in Tomcat and wondering if you have the same dilemma as me now. Nonsense less say directly on the code Java

public static Connection Getconnection_tomcat () {        Connection conn = null;        try {            Context initctx = new InitialContext ();            Context CTX = (context) initctx.lookup ("java:comp/env");                   Object obj = (object) ctx.lookup ("Jdbc/oracledb");            Javax.sql.DataSource ds = (javax.sql.DataSource) obj;            Return conn = Ds.getconnection ();        }        catch (Exception e) {                       System.out.println ("Connect error=" + e.getmessage ());            return null;        }    }

In Tomcat->conf->server.xml

  <GlobalNamingResources>    <!--Editable User database that can also is used by         Userdatabaserealm to Authen Ticate 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 "/><!--in Tomcat Configure connection pooling-  <resource name= "jdbc/oracledb"  auth= "Container"                         type= "Javax.sql.DataSource    " Driverclassname= "Oracle.jdbc.driver.OracleDriver"      url= "    maxactive=" "      maxldle=      " maxwait= "Username=" "password=" "    />    </GlobalNamingResources>

In Tomcat->conf->context.xml

<Context>    <WatchedResource>WEB-INF/web.xml</WatchedResource><!--Configuring a connection pool-->< ResourceLink global= "Jdbc/oracledb" name= "Jdbc/oracledb" type= "Javax.sql.DataSource"/>  </Context>

That's it!

The connection pool is configured on tomcat {connect error=name [Jdbc/oracledb] is not bound in the this Context. Unable to find [JDBC]}