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Springboot+netty+websocket实现在线聊天

Springboot+netty+websocket实现在线聊天

1:导入netty依赖包

		<!-- netty -->
        <dependency>
            <groupId>io.netty</groupId>
            <artifactId>netty-all</artifactId>
            <version>4.1.2.Final</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.7</version>
        </dependency>

2:添加通道组池,管理所有websocket连接

import io.netty.channel.group.ChannelGroup;
import io.netty.channel.group.DefaultChannelGroup;
import io.netty.util.concurrent.GlobalEventExecutor;

/**
 * MyChannelHandlerPool
 * 通道组池,管理所有websocket连接
 * @author zhengkai.blog.csdn.net
 * @date 2019-06-12
 */
public class MyChannelHandlerPool {

    public MyChannelHandlerPool(){}

    public static ChannelGroup channelGroup = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);

}

2:添加Netty服务器配置类

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
import io.netty.handler.stream.ChunkedWriteHandler;

/**
 * NettyServer Netty服务器配置
 * @author zhengkai.blog.csdn.net
 * @date 2019-06-12
 */
public class NettyServer {
    private final int port;

    public NettyServer(int port) {
        this.port = port;
    }

    public void start() throws Exception {
        EventLoopGroup bossGroup = new NioEventLoopGroup();

        EventLoopGroup group = new NioEventLoopGroup();
        try {
            ServerBootstrap sb = new ServerBootstrap();
            sb.option(ChannelOption.SO_BACKLOG, 1024);
            sb.group(group, bossGroup) // 绑定线程池
                    .channel(NioServerSocketChannel.class) // 指定使用的channel
                    .localAddress(this.port)// 绑定监听端口
                    .childHandler(new ChannelInitializer<SocketChannel>() { // 绑定客户端连接时候触发操作

                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            System.out.println("收到新连接");
                            //websocket协议本身是基于http协议的,所以这边也要使用http解编码器
                            ch.pipeline().addLast(new HttpServerCodec());
                            //以块的方式来写的处理器
                            ch.pipeline().addLast(new ChunkedWriteHandler());
                            ch.pipeline().addLast(new HttpObjectAggregator(8192));
                            ch.pipeline().addLast(new MyWebSocketHandler());
                            ch.pipeline().addLast(new WebSocketServerProtocolHandler("/ws", null, true, 65536*10));
                        }
                    });
            ChannelFuture cf = sb.bind().sync(); // 服务器异步创建绑定
            System.out.println(NettyServer.class + " 启动正在监听: " + cf.channel().localAddress());
            cf.channel().closeFuture().sync(); // 关闭服务器通道
        } finally {
            group.shutdownGracefully().sync(); // 释放线程池资源
            bossGroup.shutdownGracefully().sync();
        }
    }
}

3:添加通道实体和消息实体

import io.netty.channel.Channel;
import org.jboss.logging.Logger;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class UserChannelRel {

    private static Logger logger = Logger.getLogger(UserChannelRel.class);

    private static ConcurrentHashMap<String, Channel> idChannelMap = new ConcurrentHashMap<>();
    private static ConcurrentHashMap<Channel,String> channelIdMap = new ConcurrentHashMap<>();

    public synchronized static void put (String senderId, Channel channel){
        idChannelMap.put(senderId,channel);
        channelIdMap.put(channel,senderId);
    }

    /**
     * 根据id获取channel
     * @param senderId
     * @return
     */
    public static Channel getById(String senderId){
        return idChannelMap.get(senderId);
    }

    /**
     * 根据channel获取id
     * @param channel
     * @return
     */
    public static String  getByChannel(Channel channel){
        return channelIdMap.get(channel);
    }

    public static void output(){
        for(Map.Entry<String,Channel> entry : idChannelMap.entrySet()){
            Channel value = entry.getValue();
            logger.info("——————UserId: "+entry.getKey() +",ChannelId: "+entry.getValue().id().asShortText());
        }
    }

}
Data
@ApiModel("消息实体")
public class MessageEntity implements Serializable {

	//消息id
	@ApiModelProperty(value = "id")
	public Integer id;
	/**
	 * 发送者id
	 */
	@ApiModelProperty(value = "发送者id")
	public String fromId;
	/**
	 * 发送者name
	 */
	@ApiModelProperty(value = "发送者name")
	public String from;
	/**
	 * 接收者id
	 */
	@ApiModelProperty(value = "接收者id")
	public String toId;
	/**
	 * 接收者name
	 */
	@ApiModelProperty(value = "接收者name")
	public String to;
	/**
	 * 发送的文本
	 */
	@ApiModelProperty(value = "发送的文本")
	public String title;
	/**
	 * 发送的消息标签
	 */
	@ApiModelProperty(value = "发送的消息标签")
	public String label;
	/**
	 * 详情id
	 */
	@ApiModelProperty(value = "详情id")
	public Integer entityId;
	/**
	 * 发送时间
	 */
	@ApiModelProperty(value = "发送时间")
	@DateTimeFormat(pattern = "yyyy-MM-dd")
	@JsonFormat(pattern = "yyyy-MM-dd",timezone = "GMT+8")
	public Date sendingTime;
	/**
	 * 状态
	 */
	@ApiModelProperty(value = "状态")
	public String state;

	/**
	 * 类别
	 */
	@ApiModelProperty(value = "类别")
	public String type;

}

4:添加响应类

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.hrkj.coll.dmsjk.securityKnowledge.entity.MessageEntity;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.group.ChannelGroup;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import org.jboss.logging.Logger;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

public class MyWebSocketHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {

    private static Logger logger = Logger.getLogger(UserChannelRel.class);

    /**
     * 用于存储群聊房间号和群聊成员的channel信息
     */
    public static ConcurrentHashMap<String, ChannelGroup> groupMap = new ConcurrentHashMap<>();

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        System.out.println("与客户端建立连接,通道开启!");

        //添加到channelGroup通道组
        MyChannelHandlerPool.channelGroup.add(ctx.channel());
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
        System.out.println("与客户端断开连接,通道关闭!");
        //添加到channelGroup 通道组
        MyChannelHandlerPool.channelGroup.remove(ctx.channel());
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        //首次连接是FullHttpRequest,处理参数 by zhengkai.blog.csdn.net
        if (null != msg && msg instanceof FullHttpRequest) {
            FullHttpRequest request = (FullHttpRequest) msg;
            String uri = request.uri();
            Map paramMap=getUrlParams(uri);
            String userId = paramMap.get("userId").toString();
            UserChannelRel.put(userId,ctx.channel());
            System.out.println("登录的用户id是:{}"+new String[]{userId});
            //如果url包含参数,需要处理
            if(uri.contains("?")){
                String newUri=uri.substring(0,uri.indexOf("?"));
                request.setUri(newUri);
            }
            super.channelRead(ctx, msg);

        }else if(msg instanceof TextWebSocketFrame){
            //正常的TEXT消息类型
            TextWebSocketFrame frame=(TextWebSocketFrame)msg;
            channelRead0(ctx,frame);
        }
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {
        String content = msg.text();
        System.out.println("客户端收到服务器数据:"+content);
        MessageEntity messageEntity = JSON.parseObject(content, MessageEntity.class);
        //处理群聊任务
        if ("2".equals(messageEntity.getType())) {
            //推送群聊信息
            groupMap.get(messageEntity.getToId()).writeAndFlush(new TextWebSocketFrame(JSONObject.toJSONString(messageEntity)));
        } else {
            //获取当前被发送消息的用户id
            String userId = messageEntity.getToId();
            Channel channel = UserChannelRel.getById(userId);
//            Channel channel = ctx.channel();
            System.out.println("当前channel:"+channel);
            if (channel != null) {
                channel.writeAndFlush(new TextWebSocketFrame(JSONObject.toJSONString(messageEntity)));
            }
        }
    }

    /**
     * 发送给所有的成员
     * @param message
     */
    private void sendAllMessage(String message){
        //收到信息后,群发给所有channel
        MyChannelHandlerPool.channelGroup.writeAndFlush( new TextWebSocketFrame(message));
    }
    /**
     * 发送指定用户
     * @param messageEntity
     */
    public static void sendOne(MessageEntity messageEntity){
        //获取当前被发送消息的用户id
        String userId = messageEntity.getToId();
        Channel channel = UserChannelRel.getById(userId);
//            Channel channel = ctx.channel();
        System.out.println("当前channel:"+channel);
        if (channel != null) {
            channel.writeAndFlush(new TextWebSocketFrame(JSONObject.toJSONString(messageEntity)));
        }
    }

    private static Map getUrlParams(String url){
        Map<String,String> map = new HashMap<>();
        url = url.replace("?",";");
        if (!url.contains(";")){
            return map;
        }
        if (url.split(";").length > 0){
            String[] arr = url.split(";")[1].split("&");
            for (String s : arr){
                String key = s.split("=")[0];
                String value = s.split("=")[1];
                map.put(key,value);
            }
            return  map;

        }else{
            return map;
        }
    }
}

4:接口测试

/**
     * 用户-用户之间相互之间发送消息
     * @param messageEntity 消息参数
     */
    @ApiOperation("用户-用户之间相互之间发送消息")
    @GetMapping("/sendOne")
    public Object sendOne(MessageEntity messageEntity) {
        //获取当前登录用户信息
        User user = getUser();
        //保存消息信息
        messageEntity.setFromId(user.get_id());
        messageEntity.setFrom(user.getUsername());
        messageEntity.setState("0");
        messageEntity.setType("1");
        messageEntity.setSendingTime(new Date());
        boolean b = messageEntityService.insert(messageEntity);
        if(b){
            //通过参数调用netty发送消息方法
            MyWebSocketHandler.sendOne(messageEntity);
        }
        return success();
    }

5:网址测试

测试网址:http://coolaf.com/tool/chattest
在这里插入图片描述

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