websocket的通信形式今天刚学，好处就不说了，网上有很多，下面把写的即时通信的demo记录下来，运行出来像下面一样：
一、spring必须4.0以上，maven的pom文件如下：
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>4.2.4.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.2.4.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-websocket</artifactId> <version>4.2.4.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-messaging</artifactId> <version>4.2.4.RELEASE</version> </dependency>
当然了，还有servlet等等了。。。那些就自己查了
二、spring中，关于websocket的配置：
<bean id="websocket" class="com.wang.test.websocket.demo.WebSocketHander" /> <websocket:handlers> <websocket:mapping path="/echo" handler="websocket" /> <websocket:handshake-interceptors> <bean class="com.wang.test.websocket.demo.HandshakeInterceptor" /> </websocket:handshake-interceptors> </websocket:handlers>
不要忘记引入xsd文件，
http://www.springframework.org/schema/websocket http://www.springframework.org/schema/websocket/spring-websocket-4.0.xsd
整个关于websocket的配置文件如下：
<?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:websocket="http://www.springframework.org/schema/websocket"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/websocket
http://www.springframework.org/schema/websocket/spring-websocket-4.0.xsd">
<bean id="websocket" class="com.wang.test.websocket.demo.WebSocketHander" />
<websocket:handlers>
<websocket:mapping path="/echo" handler="websocket" />
<websocket:handshake-interceptors>
<bean class="com.wang.test.websocket.demo.HandshakeInterceptor" />
</websocket:handshake-interceptors>
</websocket:handlers>
</beans>
三、Interceptor类
package com.wang.test.websocket.demo;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.web.socket.WebSocketHandler;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
public class HandshakeInterceptor implements org.springframework.web.socket.server.HandshakeInterceptor{
// 初次握手访问前
@Override
public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse serverHttpResponse,
WebSocketHandler webSocketHandler, Map<String, Object> map) throws Exception {
if (request instanceof ServletServerHttpRequest) {
HttpServletRequest servletRequest = ((ServletServerHttpRequest) request).getServletRequest();
String userName = "xq";
// 使用userName区分WebSocketHandler，以便定向发送消息
// String userName = (String)
// session.getAttribute("WEBSOCKET_USERNAME");
map.put("WEBSOCKET_USERNAME", userName);
servletRequest.getSession().setAttribute("WEBSOCKET_USERNAME", userName);
}
return true;
}
// 初次握手访问后
@Override
public void afterHandshake(ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse,
WebSocketHandler webSocketHandler, Exception e) {
}
}
四、WebSocketHander类
package com.wang.test.websocket.demo;
import org.apache.log4j.Logger;
import org.springframework.web.socket.*;
import java.io.IOException;
import java.util.ArrayList;
public class WebSocketHander implements WebSocketHandler {
private static final Logger logger = Logger.getLogger(WebSocketHander.class);
private static final ArrayList<WebSocketSession> users = new ArrayList<>();
// 初次链接成功执行
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
logger.debug("链接成功......");
users.add(session);
String userName = (String) session.getAttributes().get("WEBSOCKET_USERNAME");
if (userName != null) {
// 查询未读消息
int count = 5;
session.sendMessage(new TextMessage(count + ""));
}
}
// 接受消息处理消息
@Override
public void handleMessage(WebSocketSession webSocketSession, WebSocketMessage<?> webSocketMessage)
throws Exception {
sendMessageToUsers(new TextMessage(webSocketMessage.getPayload() + ""));
}
@Override
public void handleTransportError(WebSocketSession webSocketSession, Throwable throwable) throws Exception {
if (webSocketSession.isOpen()) {
webSocketSession.close();
}
logger.debug("链接出错，关闭链接......");
users.remove(webSocketSession);
}
@Override
public void afterConnectionClosed(WebSocketSession webSocketSession, CloseStatus closeStatus) throws Exception {
logger.debug("链接关闭......" + closeStatus.toString());
users.remove(webSocketSession);
}
@Override
public boolean supportsPartialMessages() {
return false;
}
/**
* 给所有在线用户发送消息
*
* @param message
*/
public void sendMessageToUsers(TextMessage message) {
for (WebSocketSession user : users) {
try {
if (user.isOpen()) {
user.sendMessage(message);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 给某个用户发送消息
*
* @param userName
* @param message
*/
public void sendMessageToUser(String userName, TextMessage message) {
for (WebSocketSession user : users) {
if (user.getAttributes().get("WEBSOCKET_USERNAME").equals(userName)) {
try {
if (user.isOpen()) {
user.sendMessage(message);
}
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}
}
五、页面显示文件：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<script src="http://cdn.sockjs.org/sockjs-0.3.min.js"></script>
<!-- 新 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="//cdn.bootcss.com/bootstrap/3.3.5/css/bootstrap.min.css">
<!-- 可选的Bootstrap主题文件（一般不用引入） -->
<link rel="stylesheet" href="//cdn.bootcss.com/bootstrap/3.3.5/css/bootstrap-theme.min.css">
<!-- jQuery文件。务必在bootstrap.min.js 之前引入 -->
<script src="//cdn.bootcss.com/jquery/1.11.3/jquery.min.js"></script>
<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="//cdn.bootcss.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<title>webSocket测试</title>
<script type="text/javascript">
$(function() {
var websocket;
if ('WebSocket' in window) {
alert("WebSocket");
var url = 'ws://' + window.location.host + '/SSMTest/echo';
websocket = new WebSocket(url);
//websocket = new WebSocket("ws://127.0.0.1:8080/SSMTest/echo");
} else if ('MozWebSocket' in window) {
alert("MozWebSocket");
websocket = new MozWebSocket("ws://echo");
} else {
alert("SockJS");
websocket = new SockJS("http://127.0.0.1:8080/SSMTest/sockjs/echo");
}
websocket.onopen = function(evnt) {
$("#tou").html("链接服务器成功!")
};
websocket.onmessage = function(evnt) {
$("#msg").html($("#msg").html() + "<br/>" + evnt.data);
};
websocket.onerror = function(evnt) {
};
websocket.onclose = function(evnt) {
$("#tou").html("与服务器断开了链接!")
}
$('#send').bind('click', function() {
send();
});
function send() {
if (websocket != null) {
var message = document.getElementById('message').value;
websocket.send(message);
} else {
alert('未与服务器链接.');
}
}
});
</script>
</head>
<body>
<div class="page-header" id="tou">webSocket及时聊天Demo程序</div>
<div class="well" id="msg"></div>
<div class="col-lg">
<div class="input-group">
<input type="text" class="form-control" placeholder="发送信息..."
id="message"> <span class="input-group-btn">
<button class="btn btn-default" type="button" id="send">发送</button>
</span>
</div>
<!-- /input-group -->
</div>
<!-- /.col-lg-6 -->
</div>
<!-- /.row -->
</body>
</html>
六、参考：http://blog.csdn.net/mr_zhuqiang/article/details/46618197 把这里面配置形式改了
七、代码地址：https://github.com/hejiawang/SSMTest