ssm+maven项目中配置webSocket
只说明要在ssm的Maven项目中添加WebSocket的方法，使用SocketJs框架进行搭建
首先在搭建完成的ssm的Maven项目的pom文件中添加如下节点
<properties>
<spring.version>4.3.3.RELEASEspring.version>
<jackson.version>2.8.3jackson.version>
properties>
<dependencies>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-coreartifactId>
<version>${jackson.version}version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>${jackson.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-websocketartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-messagingartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-coreartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-context-supportartifactId>
<version>${spring.version}version>
dependency>
dependencies>web.xml中就是正常的ssm配置方法了
上面的内容包括了我们使用的jar包包括socketJs的jar包
因为使用socket的话session在别的地方接受不到数据，所以设置一个拦截器来管理session.创建一个握手类
/**
* websocket握手类
* @author cheny
*
*/
public class HandshakeInterceptor extends HttpSessionHandshakeInterceptor{
@Override
public boolean beforeHandshake(ServerHttpRequest request,ServerHttpResponse response, WebSocketHandler wsHandler,
Map attributes) throws Exception {
System.out.println("开始拦截类");
return super.beforeHandshake(request, response, wsHandler, attributes);
}
@Override
public void afterHandshake(ServerHttpRequest request,ServerHttpResponse response, WebSocketHandler wsHandler,
Exception ex) {
System.out.println("结束拦截类");
super.afterHandshake(request, response, wsHandler, ex);
}
} 创建一个处理信息的类
/**
* websocket工具类
* @author cheny
*
*/
public class WebsocketEndPoint extends TextWebSocketHandler {
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
super.handleTextMessage(session, message);
System.out.println("进入了工具类");
TextMessage returnMessage = new TextMessage(message.getPayload()+" 后台的消息");
session.sendMessage(returnMessage);
}
}然后再Springmvc.xml文件中添加
<mvc:annotation-driven/>
<mvc:default-servlet-handler />
<mvc:resources location="/" mapping="/**"/>
<bean id="myHandler" class="com.turing.websocket.WebsocketEndPoint">bean>
<websocket:handlers allowed-origins="*">
<websocket:mapping path="/myHandler" handler="myHandler"/>
<websocket:handshake-interceptors>
<bean class="com.turing.websocket.HandshakeInterceptor"/>
websocket:handshake-interceptors>
websocket:handlers>
<websocket:handlers allowed-origins="*">
<websocket:mapping path="/sockjs/myHandler" handler="myHandler"/>
<websocket:sockjs/>
websocket:handlers>在jsp中的内容
<body>
<div>
<div id="connect-container">
<input id="radio1" type="radio" name="group1" onclick="updateUrl('/socket/myHandler');">
<label for="radio1">W3C WebSocketlabel>
<br>
<input id="radio2" type="radio" name="group1" onclick="updateUrl('/socket/sockjs/myHandler');">
<label for="radio2">SockJSlabel>
<div>
<button id="connect" onclick="connect();">链接button>
<button id="disconnect" disabled="disabled" onclick="disconnect();">断开button>
div>
<div>
<textarea id="message" style="width: 350px" placeholder="输入要发送的消息">textarea>
div>
<div>
<button id="echo" onclick="echo();" disabled="disabled">发送消息button>
div>
div>
<div id="console-container">
<div id="console">div>
div>
div>
body>
<script src="http://cdn.sockjs.org/sockjs-0.3.min.js">script>
<script type="text/javascript">
var ws = null;
var url = null;
var transports = [];
function setConnected(connected) {
document.getElementById('connect').disabled = connected;
document.getElementById('disconnect').disabled = !connected;
document.getElementById('echo').disabled = !connected;
}
//修改url，提供了两种url一种是wbsocket的一种是sockjs的
function updateUrl(urlPath) {
//如果链接中有sockjs字段就让链接等于传进来的本身
if (urlPath.indexOf('sockjs') != -1) {
url = urlPath;
}
else {
if (window.location.protocol == 'http:') {
url = 'ws://' + window.location.host + urlPath;
} else {
url = 'wss://' + window.location.host + urlPath;
}
}
}
//链接握手
function connect() {
if (!url) {
alert('选择一个url');
return;
}
//判断链接中是否有sockjs，如果有使用sockjs的方式拼链接，如果没有发送ws链接
ws = (url.indexOf('sockjs') != -1) ?
//new SockJS(url, _reserved, options);默认三个参数，中间的基本不用，最后一个是sockjs提供的传输功能，参数是数组（默认是全部开启）
new SockJS(url) : new WebSocket(url);
//打开链接
ws.onopen = function () {
setConnected(true);
log('消息: 链接已打开');
};
//获取消息
ws.onmessage = function (event) {
//调用下面的现实信息的方法
log('推送的消息: ' + event.data);
};
//关闭链接
ws.onclose = function (event) {
setConnected(false);
//调用下面的现实信息的方法
log('消息: 链接已关闭');
log(event);
};
}
//发送消息
function echo() {
if (ws != null) {
//获取到输入框中的消息
var message = document.getElementById('message').value;
//调用下面的现实信息的方法
log('发送: ' + message);
ws.send(message);
} else {
alert('消息没有链接地址，请重新连接');
}
}
//将传输回来的信息显示在右侧
function log(message) {
var console = document.getElementById('console');
var p = document.createElement('p');
p.style.wordWrap = 'break-word';
p.appendChild(document.createTextNode(message));
console.appendChild(p);
//防止消息过长干div外面去
while (console.childNodes.length > 25) {
console.removeChild(console.firstChild);
}
//console.scrollTop = console.scrollHeight;
}
//关闭链接的时候将ws链接清空
function disconnect() {
if (ws != null) {
ws.close();
ws = null;
}
setConnected(false);
}
script>最后注意在web.xml中的spring的默认过滤器DispatcherServlet中的url-pattern
<servlet>
<servlet-name>actionservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:/spring_mvc.xmlparam-value>
init-param>
servlet>
<servlet-mapping>
<servlet-name>actionservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>到此在spring框架中配置websocket方法结束