Question

我需要在我的应用程序中注册一个额外的servlet。但是使用Spring Boot及其Java Config，我不能只在web.xml文件中添加servlet映射。

如何添加其他servlet？

Answer 1

同样可用ServletRegistrationBean

@Bean
public ServletRegistrationBean servletRegistrationBean(){
    return new ServletRegistrationBean(new FooServlet(),"/someOtherUrl/*");
}

最终成为我走的路。

Answer 2

Just add a bean for the servlet。它将映射到/{beanName}/。

@Bean
public Servlet foo() {
    return new FooServlet();
}

Answer 3

你可以在Application类中使用不同的ServletRegistrationBean注册多个不同的servlet，比如@Bean，你可以注册一个servlet有多个servlet映射;

   @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");
   }

Answer 4

我们也可以按照以下方式注册Servlet：

@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);
  }
}

Answer 5

如果您使用的是嵌入式服务器，则可以使用@WebServlet servlet类进行注释：

@WebServlet(urlPatterns = "/example")
public class ExampleServlet extends HttpServlet

来自@WebServlet：

用于声明servlet的注释。

此注释在部署时由容器处理，并且   相应的servlet在指定的URL处可用   图案。

在基类上启用@ServletComponentScan：

@ServletComponentScan
@EntityScan(basePackageClasses = { ExampleApp.class, Jsr310JpaConverters.class })
@SpringBootApplication
public class ExampleApp

请注意，@ServletComponentScan仅适用于嵌入式服务器：

启用对Servlet组件的扫描（过滤器，servlet和听众）。仅在使用嵌入式Web时执行扫描服务器

更多信息：The @ServletComponentScan Annotation in Spring Boot

Answer 6

在BeanDefinitionRegistryPostProcessor中也可用

package bj;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@SpringBootApplication
class App implements BeanDefinitionRegistryPostProcessor {
    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }

    @Override
    public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
        registry.registerBeanDefinition("myServlet", new RootBeanDefinition(ServletRegistrationBean.class,
                () -> new ServletRegistrationBean<>(new HttpServlet() {
                    @Override
                    protected void service(HttpServletRequest req, HttpServletResponse resp) throws IOException {
                        resp.getWriter().write("hello world");
                    }
                }, "/foo/*")));
    }

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {
    }
}

Answer 7

这种方式对我有用，拥有一个名为WS01455501EndpointFor89的servlet

@Bean
public ServletRegistrationBean<WS01455501EndpointFor89> servletRegistrationBeanAlt(ApplicationContext context) {
    ServletRegistrationBean<WS01455501EndpointFor89> servletRegistrationBean = new ServletRegistrationBean<>(new WS01455501EndpointFor89(),
            "/WS01455501Endpoint");
    servletRegistrationBean.setLoadOnStartup(1);
    return servletRegistrationBean;
}

如何使用Spring Boot注册辅助servlet？

7 个答案: