SpringBoot uses ServletContextListener to initialize API interface information. An error was generated: (below)
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
how to use? Implement the contexInitialized method in the ServletContextListener interface. In the modified method, the initialization operation when the web application is started is implemented. Here I am initializing the API interface.
@WebListener
public class StartListener implements ServletContextListener {
public void contextInitialized(ServletContextEvent sce) {
new APIUrl();
}
public void contextDestroyed(ServletContextEvent sce) {
}
}
Solve the above error: add annotations to the Springboot startup class
@ServletComponentScan
