<servlet>
    <servlet-name>restServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>/WEB-INF/spring2.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>ModelRestServlet</servlet-name>
    <url-pattern>/service/*</url-pattern>
  </servlet-mapping>

  @Bean
  public ServletRegistrationBean restServlet(){
    //注解扫描上下文
    AnnotationConfigWebApplicationContext applicationContext
        = new AnnotationConfigWebApplicationContext();
    //base package
    applicationContext.scan("com.jerryl.rest");
    //通过构造函数指定dispatcherServlet的上下文
    DispatcherServlet rest_dispatcherServlet
        = new DispatcherServlet(applicationContext);

    //用ServletRegistrationBean包装servlet
    ServletRegistrationBean registrationBean
        = new ServletRegistrationBean(rest_dispatcherServlet);
    registrationBean.setLoadOnStartup(1);
    //指定urlmapping
    registrationBean.addUrlMappings("/rest/*");
    //指定name，如果不指定默认为dispatcherServlet
    registrationBean.setName("rest");
    return registrationBean;
  }

    public ServletRegistrationBean dispatcherServletRegistration(DispatcherServlet dispatcherServlet) {
      ServletRegistrationBean registration = new ServletRegistrationBean(dispatcherServlet, new String[]{this.serverProperties.getServletMapping()});
      registration.setName("dispatcherServlet");
      registration.setLoadOnStartup(this.webMvcProperties.getServlet().getLoadOnStartup());
      if(this.multipartConfig != null) {
        registration.setMultipartConfig(this.multipartConfig);
      }

      return registration;
    }
  }

@Configuration
@ComponentScan("org.activiti.rest.service.api")
@EnableWebMvc
public class Cfg_Rest {
···
}

 mvc:
  #默认为/**
  static-path-pattern: /**
 resources:
  #默认为classpath:/META-INF/resources/,classpath:/resources/,classpath:/static/,classpath:/public/ 。配置多个路径，中间用逗号隔开。
  static-locations:

@Configuration
@EnableWebMvc
public class Cfg_View extends WebMvcConfigurerAdapter{
  @Override
  public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/**");
  }
}