springboot整合websocket最基础入门使用教程详解

 <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.12</version>
</dependency>

package cn.huawei.socket_test_1.config;
 
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;
 
@Component
public class WebSocketConfig {
 
  
  @Bean
  public ServerEndpointExporter serverEndpointExporter() {
    return new ServerEndpointExporter();
  }
}

package cn.huawei.socket_test_1.websock;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
 
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.concurrent.ConcurrentHashMap;
 

 
@Slf4j
@Component
@ServerEndpoint("/websocket/{name}")
public class WebSocket {
 
  
  private Session session;
 
  
  private String name;
 
  
  private static ConcurrentHashMap<String,WebSocket> webSocketSet = new ConcurrentHashMap<>();
 
 
  
  @OnOpen
  public void OnOpen(Session session, @PathParam(value = "name") String name){
    log.info("----------------------------------");
    this.session = session;
    this.name = name;
    // name是用来表示唯一客户端，如果需要指定发送，需要指定发送通过name来区分
    webSocketSet.put(name,this);
    log.info("[WebSocket] 连接成功，当前连接人数为：={}",webSocketSet.size());
    log.info("----------------------------------");
    log.info("");
 
    GroupSending(name+" 来了");
  }
 
  
  @OnClose
  public void OnClose(){
    webSocketSet.remove(this.name);
    log.info("[WebSocket] 退出成功，当前连接人数为：={}",webSocketSet.size());
 
    GroupSending(name+" 走了");
  }
 
  
  @OnMessage
  public void OnMessage(String message_str){
    log.info("[WebSocket] 收到消息：{}",message_str);
    //判断是否需要指定发送，具体规则自定义
    //message_str的格式 TOUSER:user2;message:aaaaaaaaaaaaaaaaaa;
    if(message_str.indexOf("TOUSER") == 0){
      //取出 name和message的值
      String[] split = message_str.split(";");
      String[] split1 = split[0].split(":");
      String[] split2 = split[1].split(":");
      String name = split1[1];
      String message = split2[1];
      //指定发送
      AppointSending(name,message);
    }else{
      //群发
      GroupSending(message_str);
    }
  }
 
  
  @OnError
  public void onError(Session session, Throwable error){
    log.info("发生错误");
    error.printStackTrace();
  }
 
  
  public void GroupSending(String message){
    for (String name : webSocketSet.keySet()){
      try {
        webSocketSet.get(name).session.getBasicRemote().sendText(message);
      }catch (Exception e){
        e.printStackTrace();
      }
    }
  }
 
  
  public void AppointSending(String name,String message){
    try {
      webSocketSet.get(name).session.getBasicRemote().sendText(message);
    }catch (Exception e){
      e.printStackTrace();
    }
  }
}