How to create MySQL database connection in web.xml of Apache Tomcat using Struts 2

Question

I want to make database connection at application level, so I want create connection in web.xml file of Apache tomcat server. I am developing our application us

Answer 1

Putting @Resource on the action bean property makes no sense. If you need more information about injecting resources you should read a tutorial. Instead create a ServletContextListener and put annotation there. On context initialized event set context attribute

public class MyServletContextListener implements ServletContextListener {

  @Resource(name="jdbc/dbmy")
  private DataSource ds;

  @Override
  public void contextInitialized(ServletContextEvent servletContextEvent) {
    System.out.println("contextInitialized");
    ServletContext context = servletContextEvent.getServletContext();
    context.setAttribute("ds",ds);
  }

  @Override
  public void contextDestroyed(ServletContextEvent servletContextEvent) {
    System.out.println("contextDestroyed");

  }
}

web.xml (should be in WEB-INF):

<listener>
  <listener-class>com.servlet.MyServletContextListener</listener-class>
</listener>

now you can get datasource in the execute method

ds = (DataSource)ServletActionContext.getServletContext().getAttribute("ds");