Centos7部署java websocket

在CentOS7上部署Java WebSocket，可以使用Java API for WebSocket（JSR 356）和Tyrus实现。以下是基本步骤：

1. 安装Java和Maven

   sudo yum install java-1.8.0-openjdk-devel
   sudo yum install maven

2. 创建Maven项目并添加Tyrus依赖

   mvn archetype:generate -DgroupId=com.example.websocket -DartifactId=websocket-demo -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

在pom.xml文件中添加以下依赖：

   <dependency>
       <groupId>org.glassfish.tyrus</groupId>
       <artifactId>tyrus-server</artifactId>
       <version>1.13</version>
   </dependency>
   <dependency>
       <groupId>org.glassfish.tyrus</groupId>
       <artifactId>tyrus-container-grizzly-server</artifactId>
       <version>1.13</version>
   </dependency>

3. 创建WebSocket端点类

   import javax.websocket.OnMessage;
   import javax.websocket.Session;
   import javax.websocket.server.ServerEndpoint;

   @ServerEndpoint("/websocket")
   public class WebSocketEndpoint {

       @OnMessage
       public void onMessage(String message, Session session) {
           System.out.println("Received message: " + message);
           session.getAsyncRemote().sendText("Echo: " + message);
       }
   }

4. 启动WebSocket服务器

   import org.glassfish.tyrus.server.Server;

   public class WebSocketServer {

       public static void main(String[] args) {
           Server server = new Server("localhost", 8080, "/", WebSocketEndpoint.class);
           try {
               server.start();
               System.out.println("WebSocket server started");
               Thread.currentThread().join();
           } catch (Exception e) {
               e.printStackTrace();
           } finally {
               server.stop();
           }
       }
   }

5. 编译和运行

   mvn clean package
   java -cp target/websocket-demo-1.0-SNAPSHOT.jar com.example.websocket.WebSocketServer