SpringBoot快速集成WebSocket实现群聊

SpringBoot快速集成WebSocket实现群聊

• 添加pom依赖

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

• java

package cn.pconline.pcloud.admin.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;

/**
 * @Description WebSocket配置
 * @Author jie.zhao
 * @Date 2020/3/23 18:32
 */
@Configuration
public class WebSocketConfig {
    //实例化一个Bean对象
    @Bean
    public ServerEndpointExporter serverEndpointExporter() {
        return new ServerEndpointExporter();
    }
}

package cn.pconline.pcloud.admin.controller.api;

import cn.pconline.framework.enums.MessageTypeEnum;
import cn.pconline.pcloud.base.dto.MessageDto;
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.concurrent.ConcurrentHashMap;

/**
 * @Description 群聊websocket
 * @Author jie.zhao
 * @Date 2020/3/23 18:34
 */
@Component
@ServerEndpoint("/groupChat/{groupNo}/{name}")
public class GroupChatWebsocket {

    private Logger logger = LoggerFactory.getLogger(getClass());

    /**
     * 保存 组id->组成员 的映射关系
     * 之所以使用ConcurrentHashMap因为这个是线程安全的
     */
    private static ConcurrentHashMap<String, List<Session>> groupMemberInfoMap = new ConcurrentHashMap<>();

    /**
     * 收到消息调用的方法，群成员发送消息
     *
     * @param groupNo
     * @param name
     * @param message
     */
    @OnMessage
    public void onMessage(@PathParam("groupNo") String groupNo,
                          @PathParam("name") String name, String message) {
        //得到当前群的所有会话，也就是所有用户
        List<Session> sessionList = groupMemberInfoMap.get(groupNo);
        MessageDto dto = new MessageDto();
        dto.setType(MessageTypeEnum.CHAT.getType());
        dto.setOnlineNum(sessionList.size());
        // 遍历Session集合给每个会话发送文本消息
        sessionList.forEach(item -> {
            try {
                dto.setName(name);
                dto.setContent(message);
                item.getBasicRemote().sendText(JSON.toJSONString(dto));
            } catch (IOException e) {
                e.printStackTrace();
            }
        });
    }

    /**
     * 建立连接调用的方法，群成员加入
     *
     * @param session 会话
     * @param groupNo 群id
     */
    @OnOpen
    public void onOpen(Session session, @PathParam("groupNo") String groupNo) {
        //得到当前群的所有会话，也就是所有用户
        List<Session> sessionList = groupMemberInfoMap.get(groupNo);
        if (sessionList == null) {
            sessionList = new ArrayList<>();
            groupMemberInfoMap.put(groupNo, sessionList);
        }
        sessionList.add(session);
        logger.info("连接建立");
        logger.info("直播房间号: {}, 直播在线人数: {}", groupNo, sessionList.size());
        systemOnlineNumMsg(sessionList, sessionList.size());
    }

    /**
     * 关闭连接调用的方法，群成员退出
     *
     * @param session
     * @param groupNo
     */
    @OnClose
    public void onClose(Session session, @PathParam("groupNo") String groupNo) {
        List<Session> sessionList = groupMemberInfoMap.get(groupNo);
        sessionList.remove(session);
        logger.info("连接关闭");
        logger.info("直播房间号: {}, 直播在线人数: {}", groupNo, sessionList.size());
        systemOnlineNumMsg(sessionList, sessionList.size());
    }

    /**
     * 传输消息错误调用的方法
     *
     * @param error
     */
    @OnError
    public void OnError(Throwable error) {
        logger.info("连接出错：{}", error.getMessage());
    }

    /**
     * 在线人数系统通知
     * @param sessionList
     * @param onlineNum
     */
    public void systemOnlineNumMsg(List<Session> sessionList , int onlineNum) {
        // 遍历Session集合给每个会话发送文本消息
        MessageDto dto = new MessageDto();
        dto.setType(MessageTypeEnum.SYSTEM.getType());
        sessionList.forEach(item -> {
            try {
                dto.setOnlineNum(onlineNum);
                item.getBasicRemote().sendText(JSON.toJSONString(dto));
            } catch (IOException e) {
                e.printStackTrace();
            }
        });
    }
}

package cn.pconline.pcloud.admin.controller.api;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * @Description 测试
 * @Author jie.zhao
 * @Date 2020/3/23 18:41
 */
@Controller
@RequestMapping("/api")
public class TestChatController {

    @RequestMapping("/test")
    public String index(){
        return "api/test";
    }
}

• 测试html

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>直播互动</title>
<!--适应移动端-->
<meta name="viewport" content="width=device-width, initial-scale=1">
<!--css样式-->
<style> 
body{ margin:0 auto; width:400px; border:1px solid #F00} 
.box{margin:20px;}
</style>
<!--引用jquery库-->
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/jquery-cookie/1.4.1/jquery.cookie.min.js"></script>

</head>

<body>
    <div class="box">
		 <p>直播房间号</p>
		 <input type="text" id="groupNo" value="1585023517289" placeholder="请输入房间号"/>
		 <p>昵称</p>
		 <input type="text" id="name" value="" placeholder="请输入昵称"/>
		 <p>聊天内容</p>
		 <textarea rows="3" cols="20" id="content"  placeholder="请输入聊天内容"></textarea> <br/>
		 <input type="submit" value="发送" onclick="start()"/>
		 <p>-----------------------------------------</p>
		 <div id="messages" style=""></div>
	 </div>

<script type="text/javascript">

    var webSocket = null;

    //收到消息
    function onMessage(event) {
        $('#messages').append('<p>'+ event.data+'</p>');
    }

    //建立连接
    function onOpen(event) {
		console.log('连接已经建立'); 
    }

    //发生错误
    function onError(event) {
        console.log('发生错误');
        webSocket = null;
    }

    //连接关闭
    function onClose(event) {
        console.log('连接关闭');
        webSocket = null;
    }

    //连接
    function connect() {
        //获取群号
        var groupNo = $('#groupNo').val();
        //获取昵称
        var name = $('#name').val();
        //验证非法数据
        if (url == '' || name == '') {
            alert('群号和用户名不能为空');
            return;
        }
        //验证是否已经建立连接
        if (webSocket != null) {
            alert('已经建立过连接，如需重新建立连接，请自行更改逻辑，或者重新刷新页面');
            return;
        }
        //创建Websocket连接url
        var url = 'ws://127.0.0.1:8080/cisco/groupChat/' + groupNo + '/' + name;
        //实例化WebSocket
		try {
		 webSocket = new WebSocket(url);
		}catch(err){
		}
		//出现错误
        webSocket.onerror = function (event) {
            onError(event)
        };
        //调用创建连接
        webSocket.onopen = function (event) {
            onOpen(event)
        };
        //调用收到消息
        webSocket.onmessage = function (event) {
            onMessage(event)
        };
        //调用关闭连接
        webSocket.onclose = function (event) {
            onClose(event)
        };
    }

    //开始发送
    function start() {
        //获取发送的内容
        var text =  $('#content').val(); 
        if (text == '') {
            alert('发送内容不允许为空');
            return;
        }
        if (webSocket == null) {
			console.log('连接已关闭，正在重新连接'); 
			connect(); 
        }
        //调用WebSocket发送的方法
        webSocket.send(text);
        //初始化文本域的内容为空
        $('#content').val('')
    }
	
    //连接检测，重试连接
    function wsCheck() {
        setTimeout(function () {
            if (webSocket == null) {
                connect();
                console.log('连接健康监测:'+(webSocket!=null?'ok':'error'));
            }
            wsCheck();
        }, 1000 * 10);
    }

	
	window.onload = function(){
	
		var name = $.cookie('cisco-cookie-name');
	
		if(name==null||name==''){
			name = '游客'+ Date.parse(new Date());
			$.cookie('cisco-cookie-name', name, { expires: 7 });
		}
	
		$('#name').val(name)
		connect();
		wsCheck();
	}
	
</script>
</body>
</html>