本文基于Apach Tomcat 8.0.3+MyEclipse+maven+JDK1.7
spring4.0以后加入了对websocket技术的支持，撸主目前的项目用的是SSM（springMVC+spring+MyBatis）框架，所以肯定要首选spring自带的websocket
1 在maven的pom.xml中加入websocket所依赖的jar包
<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.4.0</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.4.0</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-websocket</artifactId>//version须和spring mvc的version保持一致，否则会出现问题 <version>4.0.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-messaging</artifactId> <version>4.0.5.RELEASE</version> </dependency>
2 更新spring-mvc.xml中namespace.xsd的版本
<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">
处理类和握手协议的spring配置(applicationContext.xml文件）
<bean id="websocket" class="com.xl.websocket.handler"/> <websocket:handlers> <websocket:mapping path="/websocket" handler="websocket"/> <websocket:handshake-interceptors> <bean class="com.xl.websocket.HandshakeInterceptor"/> </websocket:handshake-interceptors> <websocket:sockjs/> </websocket:handlers>
webconfig
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(new HelloHandler(), "/hello").addInterceptors(new HandshakeInterceptor()).withSockJS().setHttpMessageCacheSize(20000);
}
3 创建握手（handshake）接口
public class HandshakeInterceptor extends HttpSessionHandshakeInterceptor {
@Override
public boolean beforeHandshake(ServerHttpRequest arg0,
ServerHttpResponse arg1, WebSocketHandler arg2,
Map<String, Object> arg3) throws Exception {
System.out.println("---- Before Handshake ----");
return super.beforeHandshake(arg0, arg1, arg2, arg3);
}
@Override
public void afterHandshake(ServerHttpRequest request,
ServerHttpResponse response, WebSocketHandler wsHandler,
Exception ex) {
System.out.println("---- After Handshake ----");
super.afterHandshake(request, response, wsHandler, ex);
}
}
4 创建websocket处理类
public class HelloHandler extends TextWebSocketHandler {
public static List<WebSocketSession> users;
static{
users = new ArrayList<WebSocketSession>();
}
@Override
public void handleTextMessage(WebSocketSession session, TextMessage message) {
//接收到客户端消息时调用
System.out.println("text message: " + session.getId() + "-" + message.getPayload());
}
@Override
public void afterConnectionEstablished(WebSocketSession session)
throws Exception {
// 与客户端完成连接后调用
System.out.println("afterConnectionEstablished");
System.out.println("getId:" + session.getId());
System.out.println("getLocalAddress:" + session.getLocalAddress().toString());
System.out.println("getTextMessageSizeLimit:" + session.getTextMessageSizeLimit());
System.out.println("getUri:" + session.getUri().toString());
System.out.println("getPrincipal:" + session.getPrincipal());
System.out.println(soslistService.getsss());
session.sendMessage(new TextMessage("你好"));
users.add(session);
}
@Override
public void handleTransportError(WebSocketSession session,
Throwable exception) throws Exception {
// 消息传输出错时调用
System.out.println("handleTransportError");
}
@Override
public void afterConnectionClosed(WebSocketSession session,
CloseStatus closeStatus) throws Exception {
// 一个客户端连接断开时关闭
System.out.println("afterConnectionClosed");
}
@Override
public boolean supportsPartialMessages() {
// TODO Auto-generated method stub
return false;
}
}
