Java 在spring应用程序中使用多个dispatcher servlet

在我的spring应用程序中，我为spring环境提供了以下配置类：

WebAppInitializer.java

@Order(value=1)
public class WebAppInitializer implements WebApplicationInitializer {

    @SuppressWarnings("resource")
    @Override
    public void onStartup(ServletContext container) {
      // Create the 'root' Spring application context
      AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
      rootContext.register(WebAppConfig.class);

      // Manage the lifecycle of the root application context
      //container.addListener(new ContextLoaderListener(rootContext));

      // Create the dispatcher servlet's Spring application context
      AnnotationConfigWebApplicationContext dispatcherContext = new AnnotationConfigWebApplicationContext();
      dispatcherContext.register(DispatcherConfig.class);

      // Register and map the dispatcher servlet
      ServletRegistration.Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(dispatcherContext));
      dispatcher.setLoadOnStartup(1);
      dispatcher.addMapping("/");
    }

}

@EnableWebMvc
@EnableTransactionManagement(mode=AdviceMode.PROXY, proxyTargetClass=true)
@ComponentScan(value="spring.webapp.lojavirtual")
@Configuration
public class WebAppConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/bootstrap/**").addResourceLocations("/bootstrap/").setCachePeriod(31556926);
        registry.addResourceHandler("/extras/**").addResourceLocations("/extras/").setCachePeriod(31556926);
        registry.addResourceHandler("/jquery/**").addResourceLocations("/jquery/").setCachePeriod(31556926);
    }

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

}

@Controller
@Import(WebAppConfig.class)
public class DispatcherConfig {

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

}

WebAppConfig.java

@Order(value=1)
public class WebAppInitializer implements WebApplicationInitializer {

    @SuppressWarnings("resource")
    @Override
    public void onStartup(ServletContext container) {
      // Create the 'root' Spring application context
      AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
      rootContext.register(WebAppConfig.class);

      // Manage the lifecycle of the root application context
      //container.addListener(new ContextLoaderListener(rootContext));

      // Create the dispatcher servlet's Spring application context
      AnnotationConfigWebApplicationContext dispatcherContext = new AnnotationConfigWebApplicationContext();
      dispatcherContext.register(DispatcherConfig.class);

      // Register and map the dispatcher servlet
      ServletRegistration.Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(dispatcherContext));
      dispatcher.setLoadOnStartup(1);
      dispatcher.addMapping("/");
    }

}

@EnableWebMvc
@EnableTransactionManagement(mode=AdviceMode.PROXY, proxyTargetClass=true)
@ComponentScan(value="spring.webapp.lojavirtual")
@Configuration
public class WebAppConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/bootstrap/**").addResourceLocations("/bootstrap/").setCachePeriod(31556926);
        registry.addResourceHandler("/extras/**").addResourceLocations("/extras/").setCachePeriod(31556926);
        registry.addResourceHandler("/jquery/**").addResourceLocations("/jquery/").setCachePeriod(31556926);
    }

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

}

@Controller
@Import(WebAppConfig.class)
public class DispatcherConfig {

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

}

DispatcherConfig.java

@Order(value=1)
public class WebAppInitializer implements WebApplicationInitializer {

    @SuppressWarnings("resource")
    @Override
    public void onStartup(ServletContext container) {
      // Create the 'root' Spring application context
      AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
      rootContext.register(WebAppConfig.class);

      // Manage the lifecycle of the root application context
      //container.addListener(new ContextLoaderListener(rootContext));

      // Create the dispatcher servlet's Spring application context
      AnnotationConfigWebApplicationContext dispatcherContext = new AnnotationConfigWebApplicationContext();
      dispatcherContext.register(DispatcherConfig.class);

      // Register and map the dispatcher servlet
      ServletRegistration.Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(dispatcherContext));
      dispatcher.setLoadOnStartup(1);
      dispatcher.addMapping("/");
    }

}

@EnableWebMvc
@EnableTransactionManagement(mode=AdviceMode.PROXY, proxyTargetClass=true)
@ComponentScan(value="spring.webapp.lojavirtual")
@Configuration
public class WebAppConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/bootstrap/**").addResourceLocations("/bootstrap/").setCachePeriod(31556926);
        registry.addResourceHandler("/extras/**").addResourceLocations("/extras/").setCachePeriod(31556926);
        registry.addResourceHandler("/jquery/**").addResourceLocations("/jquery/").setCachePeriod(31556926);
    }

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

}

@Controller
@Import(WebAppConfig.class)
public class DispatcherConfig {

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

}

我想将其他DispatcherServlet添加到我的应用程序中。我的第一个想法是将以下代码添加到上面的类中：

WebAppInitializer.java中的

@Order(value=1)
public class WebAppInitializer implements WebApplicationInitializer {

    @SuppressWarnings("resource")
    @Override
    public void onStartup(ServletContext container) {
      // Create the 'root' Spring application context
      AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
      rootContext.register(WebAppConfig.class);

      // Manage the lifecycle of the root application context
      //container.addListener(new ContextLoaderListener(rootContext));

      // Create the dispatcher servlet's Spring application context
      AnnotationConfigWebApplicationContext dispatcherContext = new AnnotationConfigWebApplicationContext();
      dispatcherContext.register(DispatcherConfig.class);

      // Register and map the dispatcher servlet
      ServletRegistration.Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(dispatcherContext));
      dispatcher.setLoadOnStartup(1);
      dispatcher.addMapping("/");
    }

}

@EnableWebMvc
@EnableTransactionManagement(mode=AdviceMode.PROXY, proxyTargetClass=true)
@ComponentScan(value="spring.webapp.lojavirtual")
@Configuration
public class WebAppConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/bootstrap/**").addResourceLocations("/bootstrap/").setCachePeriod(31556926);
        registry.addResourceHandler("/extras/**").addResourceLocations("/extras/").setCachePeriod(31556926);
        registry.addResourceHandler("/jquery/**").addResourceLocations("/jquery/").setCachePeriod(31556926);
    }

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

}

@Controller
@Import(WebAppConfig.class)
public class DispatcherConfig {

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

}

这样的新块，在适当的位置更改名称：

// Create the dispatcher servlet's Spring application context
      AnnotationConfigWebApplicationContext dispatcherContext = new AnnotationConfigWebApplicationContext();
      dispatcherContext.register(DispatcherConfig.class);

      // Register and map the dispatcher servlet
      ServletRegistration.Dynamic dispatcher = container.addServlet("dispatcher", new DispatcherServlet(dispatcherContext));
      dispatcher.setLoadOnStartup(1);
      dispatcher.addMapping("/");

并添加一个新类，如DispatcherConfig.java，名称在上面的代码中选择

我的问题是：

1） 首先，我的方法是添加新的DispatcherServlet的正确方法吗

2） 第二，如果问题1的答案是“是”，我应该在WebAppInitializer中更改哪些名称

3） 在我的控制器中，我如何确定我的请求应该放在哪个调度员servlet中？我的控制器使用如下方法调用视图：

@RequestMapping(value="view_mapping")
public method() {
    ModelAndView mav = new ModelAndView()
    mav.setViewName("view_name");
    return mav;
}

---

您可以拥有任意数量的

Dispatcherservlet

。基本上，您需要做的是复制配置并给servlet一个不同的名称（否则它将覆盖上一个名称），并为其提供一些单独的配置类（或xml文件）

您的控制器不应该关心它们在哪个

DispatcherServlet

中运行，您也不应该包含用于检测的代码（如果您添加了另一个，那么您需要不断修改控制器以修复该问题）

---

然而，虽然您通常可以有多个servlet，但并不需要多个servlet，您可以使用

DispatcherServlet

的单个实例来处理它

如果您使用的是spring 3.2或更高版本，则可以使用以下代码

使用重写

getServletName（）

方法为所有

dispacher servlet

创建不同的类，以避免相同的名称冲突

public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

        @Override
        protected Class<?>[] getRootConfigClasses() {
            // TODO Auto-generated method stub
            return new Class<?>[] { RootConfig.class };
        }

        @Override
        protected Class<?>[] getServletConfigClasses() {
            // TODO Auto-generated method stub
            return new Class<?>[] { WebConfig.class };
        }

        @Override
        protected String[] getServletMappings() {
            // TODO Auto-generated method stub
            return new String[] { "/config1/*" };
        }
    }




 public class WebAppInitializer2 extends AbstractAnnotationConfigDispatcherServletInitializer {


        @Override
        protected Class<?>[] getRootConfigClasses() {
            // TODO Auto-generated method stub
            return new Class<?>[] { RootConfig.class };
        }

        @Override
        protected Class<?>[] getServletConfigClasses() {
            // TODO Auto-generated method stub
            return new Class<?>[] { WebConfig2.class };
        }

        @Override
        protected String[] getServletMappings() {
            // TODO Auto-generated method stub
            return new String[] { "/config2/*" };
        }

           @Override
            protected String getServletName() {
              // TODO Auto-generated method stub
             return "config2";
         }
    }

公共类WebAppInitializer扩展了AbstractAnnotationConfigDispatchersServletInitializer{
@凌驾
受保护类[]getRootConfigClasses（）{
//TODO自动生成的方法存根
返回新类[]{RootConfig.Class}；
}
@凌驾
受保护类[]getServletConfigClasses（）{
//TODO自动生成的方法存根
返回新类[]{WebConfig.Class}；
}
@凌驾
受保护的字符串[]getServletMappings（）{
//TODO自动生成的方法存根
返回新字符串[]{“/config1/*”}；
}
}
公共类WebAppInitializer2扩展了AbstractAnnotationConfigDispatcherServletInitializer{
@凌驾
受保护类[]getRootConfigClasses（）{
//TODO自动生成的方法存根
返回新类[]{RootConfig.Class}；
}
@凌驾
受保护类[]getServletConfigClasses（）{
//TODO自动生成的方法存根
返回新类[]{webconfig.Class}；
}
@凌驾
受保护的字符串[]getServletMappings（）{
//TODO自动生成的方法存根
返回新字符串[]{“/config2/*”}；
}
@凌驾
受保护的字符串getServletName（）{
//TODO自动生成的方法存根
返回“config2”；
}
}

我们可以有多个DispatcherServlet，就像我们可以有2个（或更多）DispatcherServlet和2个（或更多）Servlet名称一样。因此D1和D2可以映射到不同的URL路径。例如：-

<!-- configured by WEB-INF/mac-servlet.xml -->
<servlet>
    <servlet-name>mac</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<!-- configured by WEB-INF/windows-servlet.xml -->
<servlet>
        <servlet-name>windows</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
</servlet>

雨衣
org.springframework.web.servlet.DispatcherServlet
1.
窗户
org.springframework.web.servlet.DispatcherServlet
1.

URL路径可以映射为：-

<servlet-mapping>
<servlet-name>mac</servlet-name>
<url-pattern>/mac/*</url-pattern>
</servlet-mapping>

<servlet-mapping>
    <servlet-name>windows</servlet-name>
     <url-pattern>/windows/*</url-pattern>
</servlet-mapping>

雨衣
/苹果/*
窗户
/窗户/*

您几乎总是不应该有多个servlet，而是应该将所有需要的映射添加到一个servlet中。为什么您认为需要更多？根配置类不是所有dispatcher servlet都通用吗？在您的示例中，这一事实意味着什么？要创建多个web应用初始化器，每个web应用初始化器类都应该实现

WebApplicationInitializer

接口，而不是扩展

AbstractAnnotationConfigDispatcherServletInitializer

类请，你能告诉我使用多个Dispatcherservlet有什么好处吗？好的。事实上，人们在这里投票反对这类问题。我仍将尝试现在提出的问题：