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Connection pooling in java example with oracle

Oracle connection pool example Java connection pooling Oracle database connection with JDBC Implementing  own Connection pooling in Java how to implement connection pooling in java with example Here we are creating a class and declaring all database information. This call will execute only one time at the program beaning. If you are using Web server, this call will execute one time at the beginning of the server start.  import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class ConnectionPool { static Connection con; static Statement st; static{ try { Class.forName("oracle.jdbc.driver.OracleDriver"); } catch (ClassNotFoundException e) { e.printStackTrace();
java.lang.Exception: Error getting all Data! - No bean named 'transactionManager' is defined  com.Parameters(Resource.java:46)  sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)  sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)  java.lang.reflect.Method.invoke(Method.java:601)  org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)  org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:151)  org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:172)  org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherPr...