WebSocketConfig.java
package com.springws.test;导入 org.springframework.context.annotation.ComponentScan;导入 org.springframework.context.annotation.Configuration;导入 org.springframework.messaging.simp.config.MessageBrokerRegistry；导入 org.springframework.stereotype.Controller;导入 org.springframework.web.servlet.config.annotation.EnableWebMvc;导入 org.springframework.web.socket.config.annotation.AbstractWebSocketMessageBrokerConfigurer;导入 org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;导入 org.springframework.web.socket.config.annotation.StompEndpointRegistry;@配置@ComponentScan(basePackages = {"com.springws.test"})@EnableWebSocketMessageBroker@EnableWebMvc@控制器公共类 WebSocketConfig 扩展 AbstractWebSocketMessageBrokerConfigurer {@覆盖公共无效 configureMessageBroker(MessageBrokerRegistry 配置){config.enableSimpleBroker("/topic");config.setApplicationDestinationPrefixes("/app");}@覆盖public void registerStompEndpoints(StompEndpointRegistry registry) {registry.addEndpoint("/hello").withSockJS();}}
图书馆
但是在浏览器控制台中
它给出以下输出
正在打开 Web 套接字...stomp.js:145 Web 套接字已打开...stomp.js:145 >>>连接接受版本:1.1,1.0心跳:10000,10000哎呀！与未定义的连接丢失
为什么会失去连接?
解决方案
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.现在它的工作就像一个 deram
For Last couple of days i have been trying spring 4 websocket . But There is a problemI am using apache-tomcat-8 and this is not a maven project.
Here are my snippets
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>
WebSocketConfig.
<beans
HelloMessage.java
package com.springws.test;
public class HelloMessage {
private String name;
public String getName() {
return name;
}
}
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.
<web-app
spring-servlet.
<?
WebSocketConfig.java
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();
}
}
Libraries
But in browser console
its giving the following output
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
why its losing connection ?
解决方案
I Found the Answer. I missed three libraries.
and i removed the old library jackson-annotations-2.1.2.jar and added these three libraries . And Now its workig like a deram
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07-24 09:40