获取启动bean失败'；子目录WebSockEthandler'；尝试实现WebSocket时发生异常

我将学习Spring4教程中的WebSocket。我让它在服务器响应客户端调用时工作

然而，我的用例是让服务器推送消息，而不需要客户端调用。所以我在网上查了一下如何做到这一点，发现有人说我需要使用一种叫做

SimpMessagingTemplate

的东西。 因此，我将代码更改为使用

SimpMessagingTemplate

现在，我在服务器控制台中得到了此异常：

04-Jun-2016 22:49:24.093 SEVERE [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.springframework.web.context.ContextLoader.initWebApplicationContext Context initialization failed
 org.springframework.context.ApplicationContextException: Failed to start bean 'subProtocolWebSocketHandler'; nested exception is java.lang.IllegalArgumentException: No handlers
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:176)
        at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51)
        at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346)
        at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149)
        at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:112)
        at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:852)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
        at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4809)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5251)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
        at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3827)
        at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:291)
        at org.apache.catalina.core.StandardContext.backgroundProcess(StandardContext.java:5608)
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1377)
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1381)
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1381)
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1349)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: No handlers
        at org.springframework.util.Assert.isTrue(Assert.java:68)
        at org.springframework.web.socket.messaging.SubProtocolWebSocketHandler.start(SubProtocolWebSocketHandler.java:251)
        at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173)
        ... 20 more

我发现并解决了相同的问题，但没有一个真正的解决方案张贴

我的websocket控制器：

@Controller
public class WebSockController {

    private SimpMessagingTemplate template;

    @Autowired
    public WebSockController(SimpMessagingTemplate template) {
        this.template = template;
    }

    @MessageMapping("/hello")    
    public void greeting(GreetingsFromClient message) throws Exception {
        String[] messages = {"message1","message2","message3","message4","message5"};
        for(int i=0 ; i<messages.length ; i++){
            Thread.sleep(3000); // simulated delay
            this.template.convertAndSend("/topic/greetings", new GreetingsFromServer("Hello, " + messages[i] + "!"));
        }        
    }
}

@控制器
公共类WebSockController{
私有SimpMessagingTemplate；
@自动连线
公共WebSockController（SimpMessageTemplate模板）{
this.template=模板；
}
@MessageMapping（“/hello”）
公共无效问候语（来自客户端消息的问候语）引发异常{
字符串[]messages={“message1”、“message2”、“message3”、“message4”、“message5”}；
对于（inti=0；i在与这个问题斗争了几个小时之后，我通过将websocket配置添加到rootconfig中解决了这个问题

@Configuration
@ComponentScan({ "xxxxxx.xxxxxxxxx.controllers" })
@Import({SecurityConfig.class, WebSocketConfig.class, HibernateConfig.class})
public class RootConfig {

}

使用根配置的我的应用程序初始值设定项

public class WebApplicationInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[] { RootConfig.class };
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[] { AppConfig.class };
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }
}

公共类WebApplicationInitializer扩展了AbstractAnnotationConfigDispatchersServletInitializer{
@凌驾
受保护类[]getRootConfigClasses（）{
返回新类[]{RootConfig.Class}；
}
@凌驾
受保护类[]getServletConfigClasses（）{
返回新类[]{AppConfig.Class}；
}
@凌驾
受保护的字符串[]getServletMappings（）{
返回新字符串[]{”/“}；
}
}

public class WebApplicationInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[] { RootConfig.class };
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[] { AppConfig.class };
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }
}