Spring 4 WebSocket 集成到 Spring MVC 应用程序中

Question

我基于Spring MVC写了一个简单的网络应用。 Everything run Ok。然后我创建 Endpoint 和 HandShake class 以 Terminal (C# Application) 通过 Websocket.

与服务器通信

WebsocketEndPoint.java:

public class WebsocketEndPoint extends BinaryWebSocketHandler {

    @Override
    public void afterConnectionEstablished(WebSocketSession session) throws Exception {
        System.out.println("After Connection Established !!!!");
    }

    @Override
    protected void handleBinaryMessage(WebSocketSession session, BinaryMessage message) throws Exception {
        session.sendMessage(message);
    }

    @Override
    public void afterConnectionClosed(WebSocketSession session, CloseStatus closeStatus) throws Exception {
        System.out.println("After Connection Closed !!!!");
    }

}

HandshakeInterceptor.java:

 public class HandshakeInterceptor extends HttpSessionHandshakeInterceptor{

    @Override
    public boolean beforeHandshake(ServerHttpRequest request,
        ServerHttpResponse response, WebSocketHandler wsHandler,
Map<String, Object> attributes) throws Exception {
        System.out.println("Before Handshake");
        return super.beforeHandshake(request, response, wsHandler, attributes);
    }

    @Override
    public void afterHandshake(ServerHttpRequest request,
ServerHttpResponse response, WebSocketHandler wsHandler, Exception ex) {
        System.out.println("After Handshake");
        super.afterHandshake(request, response, wsHandler, ex);
    }
}

XML 配置 websocket 处理程序和拦截器 : websocketconfig.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:websocket="http://www.springframework.org/schema/websocket"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/websocket
        http://www.springframework.org/schema/websocket/spring-websocket.xsd">

        <bean id="websocket" class="com.javahash.spring.WebsocketEndPoint"/>

        <websocket:handlers>
            <websocket:mapping path="/PaymentHandler" handler="websocket"/>
            <websocket:handshake-interceptors>
            <bean class="com.javahash.spring.HandshakeInterceptor"/>
            </websocket:handshake-interceptors>
        </websocket:handlers>
</beans>

将 websocketconfig.xml 添加到 Spring 应用程序上下文:

web.xml:

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">

    <display-name>Web server</display-name>

    <servlet>
        <servlet-name>webserver</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/dispatcher-servlet.xml
            /WEB-INF/websocketconf.xml
        </param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
</web-app>

将 websocketconfig.xml 添加到 Spring 应用程序上下文后:

终端（C# 应用程序）can communicate with Server via Socket 但我 can not access web.
我有WARNING: No mapping found for HTTP request with URI [Spring4MVCHelloWorld/hello]] in DispatcherServlet with name 'dispatcher'

调度员-servlet.xml:

<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="
 http://www.springframework.org/schema/beans
 http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
 http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <context:component-scan base-package="com.javahash.spring.controller" />

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix">
            <value>/WEB-INF/views/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>
</beans>

HelloWorldController.java:

package com.javahash.spring.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
public class HelloWorldController { 

    @RequestMapping("/hello")
    public String hello(@RequestParam(value="name", required=false, defaultValue="World") String name, Model model) {
        model.addAttribute("name", name);
        return "helloworld";
    }

}

好像@Controller not effect.

我有什么想念的吗？

Answer 1

我认为您的 dispatcher-servlet.xml 文件中缺少 <mvc:annotation-driven/>。 Spring 扫描了您的控制器 bean，但 Spring MVC 没有注册您的映射。

Spring 4 WebSocket 集成到 Spring MVC 应用程序中

The Spring 4 WebSocket integrates into a Spring MVC application

spring

spring-mvc

spring-websocket

jakarta-ee