SpringBoot整合WebSocket的客户端和服务端的实现代码-编程学习网

此demo针对ws的搭建主要逻辑背景是一个服务端B：通讯层产生消息推送出去，另外一个项目A充当客户端和服务端，A的客户端:是接收通讯层去无差别接收这些消息，A的服务端:根据地址ip去订阅。用户通过订阅A的ws，同时记录下自己的信息，项目B推送的消息，项目A接收到之后通过当初订阅的逻辑和一些权限过滤条件对项目B产生的消息进行过滤再推送到用户客户端上。

一、项目中服务端的创建

首先引入maven仓库

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-websocket</artifactId>
        </dependency>

websocket的服务端搭建

同时注意springboot要开启ws服务

启动类加上@EnableScheduling

简要解读demo

/webSocket/{id}：链接的id是业务上的一个id，这边之前做过类似拍卖的，相当于一个服务端或者业务上的一个标识，是客户端指明链接到哪一个拍卖间的标识

@ServerEndpoint：作为服务端的注解。

package com.ghh.myproject.websocket;
import cn.hutool.core.lang.UUID;
import com.alibaba.fastjson.JSON;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
@ServerEndpoint("/webSocket/{id}")
@Component
public class WebSocket {
    private Logger log = LoggerFactory.getLogger(WebSocket.class);
    private static int onlineCount = 0;
    
    private static Map<String, WebSocket> clients = new ConcurrentHashMap<>();
    
    private static Map<String, String> idMap = new ConcurrentHashMap<>();
    
    private Session session;
    
    private String id;
    
    private String userNo;
    
    @OnOpen
    public void onOpen(@PathParam("id") String id, Session session) throws IOException {
        log.info("已连接到id:{}竞拍场,当前竞拍场人数:{}", id, getUserNosById(id).size());
        this.id = id;
        this.session = session;
        // 生成一个随机序列号来存储一个id下的所有用户
        this.userNo = UUID.fastUUID().toString();
        addOnlineCount();
        //根据随机序列号存储一个socket连接
        clients.put(userNo, this);
        idMap.put(userNo, id);
    }
    
    @OnClose
    public void onClose() throws IOException {
        clients.remove(userNo);
        idMap.remove(userNo);
        subOnlineCount();
    }
    
    @OnMessage
    public void onMessage(String message) throws IOException {
//        JSONObject jsonTo = JSONObject.parseObject(message);
//        String mes = (String) jsonTo.get("message");
//        if (!("All").equals(jsonTo.get("To"))) {
//            sendMessageTo(mes, jsonTo.get("To").toString());
//        } else {
//            sendMessageAll(message);
//        }
        log.info("onMessage方法成功");
    }
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("{}", error);
    }
    public static void sendMessageTo(String message, String userNo) throws IOException {
        // session.getBasicRemote().sendText(message);
        //session.getAsyncRemote().sendText(message);
        WebSocket webSocket = clients.get(userNo);
        if (webSocket != null && webSocket.session.isOpen()) {
            webSocket.session.getAsyncRemote().sendText(JSON.toJSONString(message));
        }
    }
    
    public static void sendMessageToById(String message, String id) {
        // session.getBasicRemote().sendText(message);
        //session.getAsyncRemote().sendText(message);
        //根据id获取所有的userNo链接的用户
        List<String> userNos = getUserNosById(id);
        for (WebSocket item : clients.values()) {
            //遍历链接的value值，如果当前传入的id中链接的用户包含value值，则推送。
            if (userNos.contains(item.userNo)) {
                item.session.getAsyncRemote().sendText(message);
            }
        }
    }
    
    public static void sendMessageAll(String message){
        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<String, WebSocket> getClients() {
        return clients;
    }
    
    public static List<String> getUserNosById(String id) {
        ArrayList<String> userNos = new ArrayList<>();
        for (Map.Entry<String, String> entry : idMap.entrySet()) {
            if (entry.getValue().equals(id)) {
                userNos.add(entry.getKey());
            }
        }
        return userNos;
    }
}

　demo中模拟的是定时器推送，第一个参数是消息内容，第二个是推送到哪一个拍卖间或者其他业务上的内容。方法的具体内容上一段代码有详细解释，有通过id，或者发送给全部ws链接的客户端

WebSocket.sendMessageToById(""+count,2+"");

@Scheduled(cron = "*/5 * * * * ?")
    public void job1(){
        log.info("测试生成次数:{}",count);
        redisTemplate.opsForValue().set("测试"+count, ""+count++);
        if (count%2==0){
            WebSocket.sendMessageToById(""+count,2+"");
        }else {
            WebSocket.sendMessageToById(""+count,1+"");
        }

        log.info("websocket发送"+count);
    }

二、java充当客户端链接ws

上述是java作为ws服务端推送当前业务信息的一个demo。我们项目目前做的是一个通讯层的概念，只能够推送数据内容，却无法根据用户权限去推送不同的数据。

ws客户端的搭建，首先链接ws服务端。首先是我们另外一个服务的ws配置信息，我这边demo是模拟链接上面的ws服务

1、ws客户端的配置

package com.ghh.websocketRecive.wsMessage;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import javax.websocket.ContainerProvider;
import javax.websocket.Session;
import javax.websocket.WebSocketContainer;
import java.net.URI;

@Component
@Slf4j
public class WSClient {
    public static Session session;
    public static void startWS() {
        try {
            if (WSClient.session != null) {
                WSClient.session.close();
            }
            WebSocketContainer container = ContainerProvider.getWebSocketContainer();
            //设置消息大小最大为10M
            container.setDefaultMaxBinaryMessageBufferSize(10*1024*1024);
            container.setDefaultMaxTextMessageBufferSize(10*1024*1024);
            // 客户端，开启服务端websocket。
            String uri = "ws://192.168.0.108:8082/webSocket/1";
            Session session = container.connectToServer(WSHandler.class, URI.create(uri));
            WSClient.session = session;
        } catch (Exception ex) {
            log.info(ex.getMessage());
        }
    }
}

2、配置信息需要在项目启动的时候去启用和链接ws服务

package com.ghh.websocketRecive;
import com.ghh.websocketRecive.wsMessage.WSClient;
import lombok.extern.slf4j.Slf4j;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
import javax.annotation.PostConstruct;
@Slf4j
@EnableScheduling
@SpringBootApplication
@MapperScan("com.ghh.websocketRecive.dao")
public class WebsocketReciveApplication {
    public static void main(String[] args) {
        SpringApplication.run(WebsocketReciveApplication.class, args);
    }
    @PostConstruct
    public void init(){
        log.info("初始化应用程序");　　　　　// 初始化ws，链接服务端
        WSClient.startWS();
    }
}

3、接收服务端推送的消息进行权限过滤demo

@ClientEndpoint：作为ws的客户端注解，@OnMessage接收服务端推送的消息。

package com.ghh.websocketRecive.wsMessage;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.ghh.websocketRecive.entity.Student;
import com.ghh.websocketRecive.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
import javax.websocket.*;
import java.util.Objects;
import java.util.Set;
import static com.ghh.websocketRecive.wsMessage.WSClient.startWS;
@ClientEndpoint
@Slf4j
@Component
public class WSHandler {
    @Autowired
    RedisTemplate<String,String> redisTemplate;
    private static RedisTemplate<String,String> redisTemplateService;
    @PostConstruct
    public void init() {
        redisTemplateService=redisTemplate;
    }
    @OnOpen
    public void onOpen(Session session) {
        WSClient.session = session;
    }
    @OnMessage
    public void processMessage(String message) {
        log.info("websocketRecive接收推送消息"+message);
        int permission = Integer.parseInt(message)%5;
        //查询所有订阅的客户端的ip。
        Set<String> keys = redisTemplateService.keys("ip:*");
        for (String key : keys) {
            // 根据登录后存储的客户端ip，获取权限地址
            String s = redisTemplateService.opsForValue().get(key);
            String[] split = s.split(",");
            for (String s1 : split) {
                //向含有推送过来的数据权限地址的客户端推送告警数据。
                if (s1.equals(permission+"")){
                    WebSocket.sendMessageToByIp(message,key.split(":")[1]);
                }
            }
        }
    }
    @OnError
    public void processError(Throwable t) {
        WSClient.session = null;
        try {
            Thread.sleep(5000);
            startWS();
        } catch (InterruptedException e) {
            log.error("---websocket processError InterruptedException---", e);
        }
        log.error("---websocket processError error---", t);
    }
    @OnClose
    public void processClose(Session session, CloseReason closeReason) {
        log.error(session.getId() + closeReason.toString());
    }
    public void send(String sessionId, String message) {
        try {
            log.info("send Msg:" + message);
            if (Objects.nonNull(WSClient.session)) {
                WSClient.session.getBasicRemote().sendText(message);
            } else {
                log.info("---websocket error----");
            }
        } catch (Exception e) {
            log.error("---websocket send error---", e);
        }
    }
}

4、ws客户端推送消息，推送消息和上面服务端类似。

这边是根据ip

package com.ghh.websocketRecive.wsMessage;
import cn.hutool.core.lang.UUID;
import com.alibaba.fastjson.JSON;
import com.ghh.websocketRecive.service.UserService;
import lombok.Builder;
import lombok.Data;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
@ServerEndpoint("/webSocket/{ip}")
@Component
public class WebSocket {
    private Logger log = LoggerFactory.getLogger(WebSocket.class);
    private static int onlineCount = 0;
    private static Map<String, WebSocket> clients = new ConcurrentHashMap<>();
    private Session session;
    
    private String ip;
    @Autowired
    RedisTemplate<String,String> redisTemplate;
    private static RedisTemplate<String,String> redisTemplateService;
    @PostConstruct
    public void init() {
        redisTemplateService = redisTemplate;
    }
    @OnOpen
    public void onOpen(@PathParam("ip") String ip, Session session) throws IOException {
        log.info("ip:{}客户端已连接:,当前客户端数量:{}", ip, onlineCount+1);
        this.ip = ip;
        this.session = session;
        // 接入一个websocket则生成一个随机序列号
        addOnlineCount();
        //根据随机序列号存储一个socket连接
        clients.put(ip, this);
    }
    @OnClose
    public void onClose() throws IOException {
        clients.remove(ip);
        onlineCount--;
        subOnlineCount();
    }
    
    @OnMessage
    public void onMessage(String message) throws IOException {
        log.info("客户端发送消onMessage方法成功");
    }
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("{}", error);
    }
    public static void sendMessageTo(String message, String userNo) throws IOException {
        WebSocket webSocket = clients.get(userNo);
        if (webSocket != null && webSocket.session.isOpen()) {
            webSocket.session.getAsyncRemote().sendText(JSON.toJSONString(message));
        }
    }
    
    public static void sendMessageToByIp(String message, String ip) {
        for (WebSocket item : clients.values()) {
            //遍历链接的value值，如果当前传入的ip中链接的用户包含value值，则推送。
            if (item.ip.equals(ip)) {
                item.session.getAsyncRemote().sendText(message);
            }
        }
    }
    
    public static void sendMessageAll(String message){
        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<String, WebSocket> getClients() {
        return clients;
    }
}

概述：

至此，简易的demo搭建完成，项目gitee网址:https://gitee.com/ghhNB/study.git

到此这篇关于SpringBoot整合WebSocket的客户端和服务端的实现的文章就介绍到这了,更多相关SpringBoot整合WebSocket内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！

文章详情

SpringBoot整合WebSocket的客户端和服务端的实现代码

目录

一、项目中服务端的创建

二、java充当客户端链接ws

1、ws客户端的配置

2、配置信息需要在项目启动的时候去启用和链接ws服务

3、接收服务端推送的消息进行权限过滤demo

4、ws客户端推送消息，推送消息和上面服务端类似。

软考中级精品资料免费领

相关文章

猜你喜欢