1.两种方式,一种使用tomcat的websocket实现,一种使用spring的websocket
2.tomcat的方式需要tomcat 7.x,JEE7的支持。
3.spring与websocket整合需要spring 4.x,并且使用了socketjs,对不支持websocket的浏览器可以模拟websocket使用
二、方式一:tomcat使用这种方式无需别的任何配置,只需服务端一个处理类,
服务器端代码
package com.Socket; import java.io.IOException; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import javax.websocket.*; import javax.websocket.server.PathParam; import javax.websocket.server.ServerEndpoint; import net.sf.json.JSONObject; @ServerEndpoint("/websocket/{username}") public class WebSocket { private static int onlineCount = 0; private static Mapclients = new ConcurrentHashMap (); private Session session; private String username; @OnOpen public void onOpen(@PathParam("username") String username, Session session) throws IOException { this.username = username; this.session = session; addOnlineCount(); clients.put(username, this); System.out.println("已连接"); } @OnClose public void onClose() throws IOException { clients.remove(username); subOnlineCount(); } @OnMessage public void onMessage(String message) throws IOException { JSONObject jsonTo = JSONObject.fromObject(message); if (!jsonTo.get("To").equals("All")){ sendMessageTo("给一个人", jsonTo.get("To").toString()); }else{ sendMessageAll("给所有人"); } } @OnError public void onError(Session session, Throwable error) { error.printStackTrace(); } public void sendMessageTo(String message, String To) throws IOException { // session.getBasicRemote().sendText(message); //session.getAsyncRemote().sendText(message); for (WebSocket item : clients.values()) { if (item.username.equals(To) ) item.session.getAsyncRemote().sendText(message); } } public void sendMessageAll(String message) throws IOException { for (WebSocket item : clients.values()) { item.session.getAsyncRemote().sendText(message); } } public static synchronized int getOnlineCount() { return onlineCount; } public static synchronized void addOnlineCount() { WebSocket.onlineCount++; } public static synchronized void subOnlineCount() { WebSocket.onlineCount--; } public static synchronized Map getClients() { return clients; } }