Socket通讯-C#客户端与Java服务端通讯(发送消息和文件)

设计思路

使用websocket通信，客户端采用C#开发界面，服务端使用Java开发，最终实现Java服务端向C#客户端发送消息和文件，C#客户端实现语音广播的功能。

Java服务端设计

package servlet.websocket;

import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;

import servlet.Log;

/**
 * websocket服务端
 * 
 * @author leibf
 *
 */
@ServerEndpoint(value = "/websocket/{clientId}")
public class WebSocketServer {
    private final Log log = new Log(WebSocketServer.class);
    private Session session;
    private String clientId;
    private static Map<String, WebSocketServer> clients = new ConcurrentHashMap<String, WebSocketServer>();

    // 连接时执行
    @OnOpen
    public void onOpen(@PathParam("clientId") String clientId, Session session) throws IOException {
        this.session = session;
        this.clientId = clientId;
        clients.put(clientId, this);
        log.info("新连接：" + clientId);
    }

    // 关闭时执行
    @OnClose
    public void onClose(@PathParam("clientId") String clientId, Session session) {
        clients.remove(clientId);

        log.info("连接 " + clientId + " 关闭");
    }

    // 收到消息时执行
    @OnMessage
    public void onMessage(String message, Session session) throws IOException {
        log.info("收到用户的消息: "+  message);
        /*if("getMpDefsAndRtDatas".equals(message)){
            String msg = UnityServlet.getInstance().getAllMpDefsAndRtDatas();
            this.sendMessage(session, msg);
        }*/
    }

    // 连接错误时执行
    @OnError
    public void onError(@PathParam("clientId") String clientId, Throwable error, Session session) {
        log.info("用户id为：" + clientId + "的连接发送错误");
        error.printStackTrace();
    }

    /**
     * 发送消息给某个客户端
     * @param message
     * @param To
     * @throws IOException
     */
    public static void sendMessageTo(String message, String To) throws IOException {
        for (WebSocketServer item : clients.values()) {
            if (item.clientId.equals(To))
                item.session.getAsyncRemote().sendText(message);
        }
    }
    
    /**
     * 发送消息给某些客户端
     * @param message
     * @param To
     * @throws IOException
     */
    public static void sendMessageToSomeone(String message, String To) throws IOException {
        for (WebSocketServer item : clients.values()) {
            if (item.clientId.startsWith(To))
                item.session.getAsyncRemote().sendText(message);
        }
    }

    /**
     * 发送消息给所有客户端
     * @param message
     * @throws IOException
     */
    public static void sendMessageAll(String message) throws IOException {
        for (WebSocketServer item : clients.values()) {
            item.session.getAsyncRemote().sendText(message);
        }
    }
    
    /**
     * 发送消息
     * @param session
     * @param message
     * @throws IOException
     */
    private void sendMessage(Session session,String message) throws IOException{
        session.getBasicRemote().sendText(message);
    }
}
Java端发送请求指令

String clientId = "broadcast";
try {
    WebSocketServer.sendMessageTo("broadcast",clientId);
} catch (IOException e) {
    e.printStackTrace();
}

C#客户端设计

websocket连接

WebSocket websocket = null;
private void websocket_MessageReceived(object sender, MessageReceivedEventArgs e){
    //接收服务端发来的消息
    MessageReceivedEventArgs responseMsg = (MessageReceivedEventArgs)e; 
    string strMsg = responseMsg.Message;
    if(strMsg.Equals("broadcast")){
        websocketToPlay();
    }else if(strMsg.Equals("broadcastStop")){
        websocketToStop(sender,e);
    }
}
        
private void websocket_Closed(object sender, EventArgs e){
     DisplayStatusInfo("websocket connect failed!");
}

private void websocket_Opened(object sender, EventArgs e){
     DisplayStatusInfo("websocket connect success!");
}

//websocket连接
private void connectWebsocket(){
    websocket = new WebSocket("ws://localhost:8080/FrameServlet/websocket/broadcast");
    websocket.Opened += websocket_Opened;
    websocket.Closed += websocket_Closed;
    websocket.MessageReceived += websocket_MessageReceived;
    websocket.Open();
}

跨线程操作控件 --- InvokeRequired属性与Invoke方法

private delegate void DoLog(string msg);
private void DisplayStatusInfo(string msg)
{
    if (this.InvokeRequired)
    {
        DoLog doLog = new DoLog(DisplayStatusInfo);
        this.Invoke(doLog, new object[] { msg });
     }else{
        if (msg.Trim().Length > 0)
        {
             ListBoxStatus.Items.Insert(0, msg);
             if (ListBoxStatus.Items.Count > 100)
             {
                 ListBoxStatus.Items.RemoveAt(ListBoxStatus.Items.Count - 1);
             }
        }
     }
}

C#客户端界面展示