SpringBoot 添加多个servlet

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springboot 添加多个servlet

参考问题链接

除了网上可以搜到的几种方法外，还可以实现ServletContextInitializer接口（spring下实现WebApplicationInitializer接口，springboot 内嵌tomcat时实现WebApplicationInitializer无效）

将view和api分开

View-DispatcherServlet

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/**
 * @author techoneduan
 * @date 2019/1/2
 */
@Configuration
public class WebInitializer implements ServletContextInitializer {
    @Override
    public void onStartup (ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext dispatcherCtx = new AnnotationConfigWebApplicationContext();
        dispatcherCtx.register(WebConfig.class);
        ServletRegistration.Dynamic dispatcher = servletContext.addServlet("View-dispatcher", new DispatcherServlet(dispatcherCtx));
        dispatcher.addMapping("/");
        dispatcher.setLoadOnStartup(1);

        //字符集过滤器
        FilterRegistration.Dynamic characterEncodingFilter = servletContext.addFilter("CharacterEncodingFilter", CharacterEncodingFilter.class);
        characterEncodingFilter.setInitParameter("encoding", "UTF-8");
        characterEncodingFilter.setInitParameter("forceEncoding", "true");
        characterEncodingFilter.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST), false, "/*");
    }
}

Api-DispatcherServlet
可以添加一些自定义的过滤器

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/**
 * @author techoneduan
 * @date 2018/12/6
 */
@Configuration
public class ApiWebInitiallizer implements ServletContextInitializer {
    @Override
    public void onStartup (ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext apiDispatcherCtx = new AnnotationConfigWebApplicationContext();
        apiDispatcherCtx.register(ApiWebConfig.class);
        ServletRegistration.Dynamic apiDispatcher = servletContext.addServlet("web-api-dispatcher", new DispatcherServlet(apiDispatcherCtx));
        apiDispatcher.addMapping("/api/*");
        apiDispatcher.setLoadOnStartup(1);

        FilterRegistration.Dynamic base64DecodingFilter = servletContext.addFilter("base64DecodingFilter",Base64DecodingFilter.class);
        base64DecodingFilter.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST),false,"/api/*");

        FilterRegistration.Dynamic framefilter = servletContext.addFilter("frameworkFilter",FrameWorkFilter.class);
        framefilter.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST),false,"/api/*");
    }
}

config类

@ComponentScan注解必须配合@EnableWebMvc使用

ViewWebConfig
配置视图解析器、静态资源处理

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/**
 * @author techoneduan
 * @date 2019/1/2
 */
@Configuration
@ComponentScan(basePackages = "com.eureka.client.web.view")
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {

    @Bean
    public InternalResourceViewResolver viewResolver () {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setPrefix("/WEB-INF/jsp/");
        viewResolver.setSuffix(".jsp");
//      viewResolver.setViewClass(JstlView.class);
        return viewResolver;
    }

//    @Bean
//    public DispatcherServlet webDispatcherServlet () {
//        AnnotationConfigWebApplicationContext ctx
//                = new AnnotationConfigWebApplicationContext();
//        ctx.register(WebConfig.class);
//        DispatcherServlet dispatcherServlet = new DispatcherServlet(ctx);
//        return dispatcherServlet;
//    }
//
//    @Bean
//    public ServletRegistrationBean servletRegistration () {
//        ServletRegistrationBean registration = new ServletRegistrationBean(webDispatcherServlet(), "/");
//        registration.setName("client-dispatcher");
//        registration.setLoadOnStartup(1);
//        return registration;
//    }

    /**
     * 静态资源配置
     *
     * @param registry
     */
    @Override
    public void addResourceHandlers (ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
    }

    @Override
    public void configureDefaultServletHandling (DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

}

ApiWebConfig

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/**
 * @author techoneduan
 * @date 2018/12/28
 */
@Configuration
@ComponentScan(basePackages = "com.eureka.client.web.api")
@EnableWebMvc
public class ApiWebConfig implements WebMvcConfigurer {

    @Bean
    public JsonMapperArgumentResolver jsonMapperArgumentResolver () {
        JsonMapperArgumentResolver jsonMapperArgumentResolver = new JsonMapperArgumentResolver();
        return jsonMapperArgumentResolver;
    }

    @Override
    public void addArgumentResolvers (List<HandlerMethodArgumentResolver> argumentResolvers) {
        argumentResolvers.add(jsonMapperArgumentResolver());

    }

}
Thanks!