为Spring boot项目增加Servlet
为Spring boot项目增加Servlet
为Spring boot项目增加Servlet有好多种方式
方式1
Just add a bean for the servlet. It'll get mapped to /{beanName}/.
@Bean
public Servlet foo() {
return new FooServlet();
}
Note that if you actually want it mapped to /something/* rather than /something/ you will need to use ServletRegistrationBean
方式2
使用ServletRegistrationBean
@Bean
public ServletRegistrationBean servletRegistrationBean(){
return new ServletRegistrationBean(new FooServlet(),"/someOtherUrl/*");
}
如果想增加多个的话，就类似下面的方式
@Bean
public ServletRegistrationBean axisServletRegistrationBean() {
ServletRegistrationBean registration = new ServletRegistrationBean(new AxisServlet(), "/services/*");
registration.addUrlMappings("*.jws");
return registration;
}
@Bean
public ServletRegistrationBean adminServletRegistrationBean() {
return new ServletRegistrationBean(new AdminServlet(), "/servlet/AdminServlet");
}
方式3
通过实现WebApplicationInitializer或者ServletContextInitializer或者ServletContainerInitializer接口
@Configuration
public class ConfigureWeb implements ServletContextInitializer, EmbeddedServletContainerCustomizer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
registerServlet(servletContext);
}
private void registerServlet(ServletContext servletContext) {
log.debug("register Servlet");
ServletRegistration.Dynamic serviceServlet = servletContext.addServlet("ServiceConnect", new ServiceServlet());
serviceServlet.addMapping("/api/ServiceConnect/*");
serviceServlet.setAsyncSupported(true);
serviceServlet.setLoadOnStartup(2);
}
}
方式4
如果使用内嵌的server的话，那么还可以使用@WebServlet WebServlet
Annotation used to declare a servlet.
This annotation is processed by the container at deployment time, and the corresponding servlet made available at the specified URL patterns.
@WebServlet(urlPatterns = "/example")
public class ExampleServlet extends HttpServlet
然后增加注解@ServletComponentScan:
@ServletComponentScan
@EntityScan(basePackageClasses = { ExampleApp.class, Jsr310JpaConverters.class })
@SpringBootApplication
public class ExampleApp
Please note that @ServletComponentScan will work only with embedded server:
Enables scanning for Servlet components (filters, servlets, and listeners). Scanning is only performed when using an embedded web server.