java在spring引导下使用多个dispatcher servlet/web上下文

Question

我创建了一个具有父上下文（服务）和子上下文（SpringWebMVC控制器）的SpringBoot应用程序：

@Configuration
public class MainApiApplication {

    public static void main(String[] args) {
        new SpringApplicationBuilder()
                .parent(Services.class)
                .child(ApiOne.class, MainApiApplication.class)
                .run(args);
    }

    @Bean
    public EmbeddedServletContainerFactory servletContainer() {
        return new TomcatEmbeddedServletContainerFactory();
    }

}

现在我想为我的ApiTwo.class配置添加另一个客户端上下文（和DispatcherServlet）。我想我必须做两件事：

1. 将servletContainer（因此是MainApiApplication.class配置）移出子上下文并
2. 添加路径映射/one/ -> ApiOne.class和/two/ ApiTwo.class

spring boot的方法是什么

Answer 1

正如@josh ghiloni已经说过的，您需要为您想要创建的每个孤立的web上下文注册一个ServletRegistrationBean。 您需要从xml或java配置类创建应用程序上下文。您可以使用@Import和@ComponentScan注释将共享服务添加到父上下文中。以下是一个例子：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.context.embedded.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.context.support.XmlWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;


//@ComponentScan({"..."})
//@Import({})
public class Starter {

    public static void main(String[] args) throws Exception {
        SpringApplication.run(Starter.class, args);
    }

    @Bean
    public ServletRegistrationBean apiV1() {
        DispatcherServlet dispatcherServlet = new DispatcherServlet();

        XmlWebApplicationContext applicationContext = new XmlWebApplicationContext();
        applicationContext.setConfigLocation("classpath:/META-INF/spring/webmvc-context.xml");
        dispatcherServlet.setApplicationContext(applicationContext);

        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(dispatcherServlet, "/api/1/*");
        servletRegistrationBean.setName("api-v1");

        return servletRegistrationBean;
    }

    @Bean
    public ServletRegistrationBean apiV2() {
        DispatcherServlet dispatcherServlet = new DispatcherServlet();

        AnnotationConfigWebApplicationContext applicationContext = new AnnotationConfigWebApplicationContext();
        applicationContext.register(ResourceConfig.class);
        dispatcherServlet.setApplicationContext(applicationContext);

        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(dispatcherServlet, "/api/2/*");
        servletRegistrationBean.setName("api-v2");
        return servletRegistrationBean;
    }
}

Answer 2

创建一个声明servlet及其映射的ServletRegistrationBean。您可能还想从调用的自动配置中排除DispatcherServletAutoConfiguration，因为它将在/注册一个DispatcherServlet并覆盖您的

编辑尽管我在下面的评论中说您可能不需要它，除非您需要在单独的端口上运行API（而且听起来不像），Spring Boot的作者之一Dave Syer在这里回答了一个非常类似的问题：Configure multiple servletcontainers/servlets with spring boot