Spring 哎呀！与未定义的连接断开-连接刚建立就断开_Spring_Spring Mvc_Websocket_Stomp_Spring Websocket

Spring 哎呀！与未定义的连接断开-连接刚建立就断开

spring spring-mvc websocket

Spring 哎呀！与未定义的连接断开-连接刚建立就断开,spring,spring-mvc,websocket,stomp,spring-websocket,Spring,Spring Mvc,Websocket,Stomp,Spring Websocket,在过去的几天里，我一直在尝试Spring4WebSocket。但有一个问题我使用的是apache-tomcat-8，这不是一个maven项目以下是我的片段 index.jsp <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib uri="http://www.springframework.org/tags" p

在过去的几天里，我一直在尝试Spring4WebSocket。但有一个问题我使用的是apache-tomcat-8，这不是一个maven项目

以下是我的片段

index.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>Hello WebSocket</title>
    <script type="text/javascript" src="./js/sockjs-0.3.4.js"></script>
    <script type="text/javascript" src="./js/stomp.js"></script>
    <script type="text/javascript">
        var stompClient = null;

        function setConnected(connected) {
            document.getElementById('connect').disabled = connected;
            document.getElementById('disconnect').disabled = !connected;
            document.getElementById('conversationDiv').style.visibility = connected ? 'visible' : 'hidden';
            document.getElementById('response').innerHTML = '';
        }

        function connect() {

             var socket = new SockJS("<c:url value='/hello'/>");
            stompClient = Stomp.over(socket);
            stompClient.connect({}, function(frame) {
                setConnected(true);
                console.log('Connected: ' + frame);
                window.alert('Connected: ' + frame);
                stompClient.subscribe('/topic/greetings', function(greeting){
                    showGreeting(JSON.parse(greeting.body).content);
                });
            });
        }

        function disconnect() {
            if (stompClient != null) {
                stompClient.disconnect();
            }
            setConnected(false);
            console.log("Disconnected");
        }

        function sendName() {
            var name = document.getElementById('name').value;
            stompClient.send("/app/hello", {}, JSON.stringify({ 'name': name }));
        }

        function showGreeting(message) {
            var response = document.getElementById('response');
            var p = document.createElement('p');
            p.style.wordWrap = 'break-word';
            p.appendChild(document.createTextNode(message));
            response.appendChild(p);
        }
    </script>
</head>
<body>
<noscript><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websocket relies on Javascript being enabled. Please enable
    Javascript and reload this page!</h2></noscript>
<div>
    <div>
        <button id="connect" onclick='connect();'>Connect</button>
        <button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button>
    </div>
    <div id="conversationDiv">
        <label>What is your name?</label><input type="text" id="name" />
        <button id="sendName" onclick="sendName();">Send</button>
        <p id="response"></p>
    </div>
</div>
</body>
</html>

Greeting.java

package com.springws.test;

public class Greeting {

    private String content;

    public Greeting(String content) {
        this.content = content;
    }

    public String getContent() {
        return content;
    }

}

GreetingController.java

package com.springws.test;

import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;

@Controller
public class GreetingController {

    @MessageMapping("/hello")
    @SendTo("/topic/greetings")
    public Greeting greeting(HelloMessage message) throws Exception {

        System.out.println(message.getName());
        return new Greeting("Hello, " + message.getName() + "!");
    }

}

web.xml

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         id="WebApp_ID"
         version="3.0">
  <display-name>CRUDWebAppMavenized</display-name>

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

   <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value> /WEB-INF/WebSocketConfig.xml</param-value>

</context-param>

    <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>


  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>
</web-app>

图书馆

但在浏览器控制台中

它给出以下输出

Opening Web Socket...
stomp.js:145 Web Socket Opened...
stomp.js:145 >>> CONNECT
accept-version:1.1,1.0
heart-beat:10000,10000

Whoops! Lost connection to undefined

为什么会失去联系

我找到了答案。我错过了三个图书馆

jackson-annotations-2.5.1.jar

jackson-core-2.5.1.jar

jackson-databind-2.5.1.jar

我删除了旧库jackson-annotations-2.1.2.jar并添加了这三个库。现在它的工作原理就像一个deram

你最好从这样的东西开始-我在你的应用程序中看到了很多问题；您将java配置和xml配置混合在一起用于相同的事情（这里是websocket），您在xml配置中使用版本化的XSD（您不应该这样做，尤其是如果它的版本错误），等等。我正在按照您的建议做同样的事，但我尝试使用spring mvc。

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         id="WebApp_ID"
         version="3.0">
  <display-name>CRUDWebAppMavenized</display-name>

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

   <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value> /WEB-INF/WebSocketConfig.xml</param-value>

</context-param>

    <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>


  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>
</web-app>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:jee="http://www.springframework.org/schema/jee"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:util="http://www.springframework.org/schema/util"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="
            http://www.springframework.org/schema/beans     http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
            http://www.springframework.org/schema/context   http://www.springframework.org/schema/context/spring-context-3.0.xsd
            http://www.springframework.org/schema/jee       http://www.springframework.org/schema/jee/spring-jee.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
            http://www.springframework.org/schema/aop       http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
            http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <mvc:annotation-driven/>
    <mvc:default-servlet-handler/>

    <context:annotation-config />

    <context:component-scan base-package="com.springws.test" /> 

    <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <tx:annotation-driven />

</beans>

package com.springws.test;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.socket.config.annotation.AbstractWebSocketMessageBrokerConfigurer;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;

@Configuration
@ComponentScan(basePackages = {"com.springws.test"})
@EnableWebSocketMessageBroker
@EnableWebMvc
@Controller
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/topic");
        config.setApplicationDestinationPrefixes("/app");
    }

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/hello").withSockJS();
    }


}

Opening Web Socket...
stomp.js:145 Web Socket Opened...
stomp.js:145 >>> CONNECT
accept-version:1.1,1.0
heart-beat:10000,10000

Whoops! Lost connection to undefined