springboot整合websocket實作群聊 + 私信，可提供原始碼

websocket怎么說呢，就是服務器可以主動向客戶端發起對話！

最新更新2021年8月20日15:48:05
內容：實作私信

這樣就很好理解了吧！
咱們先上效果圖：

相對來說更好看那么一點但是，實作代碼都是一樣的，我們先來準備作業匯入依賴

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

其實springboot已經內置了，直接在主函式啟動就行，但我們這次就講這個，匯入依賴后
掃描啟用

package com.nx.study.springstudy.config;

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

@Configuration
public class WS {

    @Bean
    public ServerEndpointExporter serverEndpointExporter(){
        return new ServerEndpointExporter();
    }
}

**@ServerEndpoint("/websocket/{username}")**接收前端傳回資料
@Component啟用

package com.nx.study.springstudy.bean;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import net.sf.json.JSONObject;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestParam;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;

@ServerEndpoint("/websocket/{username}")
@Component
public class Myws {

    private static Map<String, Myws> webSocketSet = new ConcurrentHashMap<String, Myws>();
    private static Map<String, Session> map = new HashMap<String, Session>();
    private static List<String> namelist = new ArrayList<String>();
    private static JSONObject jsonObject = new JSONObject();
    private static JSONObject jsonObject2 = new JSONObject();
    private static List<String> nm_msg = new ArrayList<String>();
    private SocketMsg socketMsg;

    private Session session;
    private String name;

    @OnOpen
    public void onpen(Session session, @PathParam(value = "username") String username){
        if(username == null){
            username = "游客";
        }
        this.session = session;
//        this.name = "南" + getname();
        this.name = username;

        webSocketSet.put(name, this);
        map.put(username, session);

        namelist.clear();  // 清空原來的資訊
        setonlion();
        jsonObject.put("onlinepp", namelist);
        String message = jsonObject.toString();
        broadcast2(message);

    }

    @OnClose
    public void onclose(){
        webSocketSet.remove(this.name);  // 移除物件

        namelist.clear();
        setonlion();
        jsonObject.clear();

        jsonObject.put("onlinepp", namelist);
        String message = jsonObject.toString();
        broadcast3(message);
    }

    @OnMessage
    public void onmessage(String message){

        nm_msg.clear();
        jsonObject2.clear();

        nm_msg.add(name);
        nm_msg.add(message);
        jsonObject2.put("chat", nm_msg);
        String message2 = jsonObject2.toString();
       broadcast(message2);
    }

    @OnError
    public void one rror(Session session, Throwable error) {
        System.out.println("發生錯誤");
        error.printStackTrace();
    }

    public void broadcast(String message){
        for (Map.Entry<String, Myws> item : webSocketSet.entrySet()){
            item.getValue().session.getAsyncRemote().sendText(message);
        }
    }

    public void broadcast2(String message){
        for (Map.Entry<String, Myws> item : webSocketSet.entrySet()){
            item.getValue().session.getAsyncRemote().sendText(message);
        }
    }

    public void broadcast3(String message){
        for (Map.Entry<String, Myws> item : webSocketSet.entrySet()){
            if (!item.getKey().equals(name)){
                item.getValue().session.getAsyncRemote().sendText(message);
            }
        }
    }

    public void setonlion(){
        for (Map.Entry<String, Myws> item : webSocketSet.entrySet()){
                namelist.add(item.getKey());
        }
    }

    public String getname() {
        String linkNo = "";
        // 用字符陣列的方式隨機
        String model = "小大天明畫美麗豪子余多少浩然兄弟朋友美韻紫萱好人壞蛋誤解不要停棲棲遑遑可";
        char[] m = model.toCharArray();
        for (int j = 0; j < 2; j++) {
            char c = m[(int) (Math.random() * 36)];
            // 保證六位亂數之間沒有重復的
            if (linkNo.contains(String.valueOf(c))) {
                j--;
                continue;
            }
            linkNo = linkNo + c;
        }
        return linkNo;
    }


}

其中重點就是4個注解**@OnOpen，@OnClose，@OnMessage，@OnError**
@OnOpen–>客戶端打開鏈接時候觸發執行
@OnClose–>客戶端關閉鏈接觸發執行
@OnMessage–>客戶端發送資訊觸發執行
@OnError–>發送錯誤時候觸發執行

物件資訊都儲存在Session，可以仔細看看上面代碼很好理解，我們只需要理解這4個注解的作用就可以！
我們的前端頁面來了代碼如下

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">

<head>
    <link rel="icon" type="image/x-icon" th:href="@{/img/user/head/favicon.ico}" />
    <script th:src="@{webjars/jquery/3.1.1/jquery.min.js}"></script>
    <script th:src="@{webjars/bootstrap/3.3.7/js/bootstrap.min.js}"></script>
    <link rel="stylesheet" th:href="@{webjars/bootstrap/3.3.7/css/bootstrap.min.css}" />
    <link th:href="@{/css/home.css}" rel="stylesheet" type="text/css" />
    <meta charset="UTF-8">
    <title>在線聊天室</title>
</head>
<body>
<div class="container-fluid">
    <div style="width: 100%;height: 100px;text-align: center;margin-bottom: 30px;color: #495e6a;box-shadow: 0px 0px 10px #000000">
        <br>
        <h1>文明用語，快樂你我他</h1>
    </div>
    <div style="width: 800px;height: 600px;margin: auto;background-color: #dce9f6;box-shadow: 0px 0px 10px #707074;display: flex">
        <div style="width: 200px;height: 600px;background-color: #d4d1d1">
            <div style="width: 160px;height: 40px;margin: auto;margin-top: 10px;background-color: #fdffff;text-align: center;box-shadow: 0px 0px 10px #474749;border-radius: 4px">
                <span class="glyphicon glyphicon-globe" style="font-size: 30px;padding-top: 2px;padding-bottom: 2px"></span>
                <span style="font-size: 30px">群聊</span>
            </div>
            <div style="width: 160px;height: 40px;margin: auto;margin-top: 10px;background-color: #fdffff;text-align: center;box-shadow: 0px 0px 10px #474749;border-radius: 4px">
                <span class="glyphicon glyphicon-star" style="font-size: 30px;padding-top: 2px;padding-bottom: 2px"></span>
                <span style="font-size: 30px" th:text="${Springuser.username}">游客</span>
            </div>
            <hr>
            <div id="online" style="width: 200px;height: 500px;word-break: break-word;overflow: auto">

            </div>
        </div>
        <div style="width: 600px;height: 600px">
            <div style="width: 600px;height: 500px;padding: 20px 20px 20px 20px;word-break: break-word;overflow: auto" id="message">

            </div>
            <div style="width: 600px;height: 100px;background-color: #ddf1d7;display: flex">
                <div style="width: 100px;height: 100px;text-align: center;background-color: #f5d2d2">
                    <button id="btn1" class="btn btn-success" style="margin-top: 5px">連接上線</button><br>
                    <br>
                    <button id="btn2" class="btn btn-danger">下線</button>
                </div>
                <div style="width: 500px;height: 100px;padding: 10px 10px 10px 10px" class="input-group">
                    <input id="msg" type="text" class="form-control" placeholder="在這里輸入想說的話吧！" /><br>
                    <button id="btn3" class="btn btn-info" style="margin-top: 10px;float: right">發送訊息</button>
                </div>
            </div>
        </div>
    </div>
    <div class="div2" style="margin-top: 30px;background-color: #ffffff">
        <br><br>
        <a href="#"><span style="color: #000000;">關于我們</span></a>&nbsp;|&nbsp;
        <a href="mailto: 2251798294@qq.com" style="color: #000000;">找我合作</a><br>
        <a href="http://beian.miit.gov.cn" style="color: #202223;">贛ICP備2021004042號</a>
    </div>
</div>
</body>
<script th:inline="javascript" language='javascript'>
    $(document).ready(function(){
        var select;
        var message = "";
        var fromuser = "";
        var touser = "";
        var type = 0;
        var username = [[${Springuser.username}]];
        var websocket = null;
        $("#btn1").click(function(){
            //判斷當前瀏覽器是否支持WebSocket
            if(select === 1){
                alert("你已連接上線路，無需重復連接！")
            }else {
                if ('WebSocket'in window) {
                    websocket = new WebSocket("ws://wenhaosuper.top:8000/websocket/" + username);
                    alert("歡迎-->" + username + "<--成功上線！");
                    select = 1;
                } else {
                    alert('Not support websocket')
                }
            }
            //連接發生錯誤的回呼方法
            websocket.onerror = function() {
                alert("錯誤");
            };

            //連接成功建立的回呼方法
            websocket.onopen = function() {
            }

            //接收到訊息的回呼方法
            websocket.onmessage = function(event) {
                var msg = event.data
                var obj = JSON.parse(msg);
                var zxname = obj.onlinepp;
                var chat = obj.chat;
                if (zxname != null){
                    onlinename(zxname);
                }
                if (chat != null){
                    setchat(chat);
                }
            }

            //連接關閉的回呼方法
            websocket.onclose = function() {
                alert("離開");
                select = 2;
                $("#online").empty();

            }
            //監聽視窗關閉事件，當視窗關閉時，主動去關閉websocket連接，防止連接還沒斷開就關閉視窗，server端會拋例外，
            window.onbeforeunload = function() {
                websocket.onclose;
                websocket.close();
            }
        });

        //將訊息顯示在網頁上
        function setchat(message) {
            $("<div style=\"width: 560px;min-height: 40px;display: flex;margin-bottom: 20px\">\n" +
                "                    <div style=\"width: 40px;height: 40px;background-color: #ffffff;text-align: center;border-radius: 20px\">\n" +
                "                        <span style=\"font-size: 28px;margin-top: 9px\"><strong>N</strong></span>\n" +
                "                    </div>\n" +
                "                    <div style=\"min-height: 40px;margin-left: 10px\">\n" +
                "                        <div style=\"height: 18px\">\n" +
                "                            <span style=\"color: #7f7777;font-size: 14px\">"+message[0]+"</span>\n" +
                "                        </div>\n" +
                "                        <div style=\"min-height: 20px;word-break: break-word;background-color: #ffffff;padding: 10px 10px 10px 10px;border-radius: 6px\">\n" +
                "                            <span>"+message[1]+"</span>\n" +
                "                        </div>\n" +
                "                    </div>\n" +
                "                </div>").appendTo("#message");
        }

        function onlinename(obj){
            $("#online").empty();
            obj.forEach(function (e){
                $("<div style=\"width: 160px;height: 40px;margin: auto;margin-top: 10px;background-color: #fdffff;text-align: center;box-shadow: 0px 0px 10px #474749;border-radius: 4px;overflow: hidden\">\n" +
                    "                <span class=\"glyphicon glyphicon-user\" style=\"font-size: 30px;padding-top: 2px;padding-bottom: 2px\"></span>\n" +
                    "                <span style=\"font-size: 26px\">"+e+"</span>\n" +
                    "            </div>").appendTo("#online");
            });
        }

        $("#btn2").click(function(){
            websocket.close();
        });
        //發送訊息

        $("#btn3").click(function(){
            var message = $("#msg").val();
            websocket.send(message);
            $("#msg").val("");
        });


    });
</script>
</html>

前端基礎著實差了一點！哈哈哈
當然因為我這個是springboot專案，我用了模板引擎
代碼如下

package com.nx.study.springstudy.controller;

import com.nx.study.springstudy.bean.UserPostForm;
import com.nx.study.springstudy.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

@Controller
public class WebSocketController {

    @Autowired
    private UserService userService;

    @RequestMapping("/websocket")
    public String webSocket(Model model, HttpServletRequest request){
        HttpSession httpSession = request.getSession();
        String username = (String) request.getSession().getAttribute("username");
        String userpassword = (String) request.getSession().getAttribute("userpassword");
        if (username != null){
            UserPostForm Springuser = userService.query(username,userpassword);
            model.addAttribute("Springuser", Springuser);
            return "index/webSocket";
        }else {
            return "index/ZGZG";
        }

    }

}

最后就放幾張效果圖吧


后續問題解答—>
就是在專案打包的時候，會出現打包失敗拋出一個錯誤，對于這個問題我也是在網上查找了一番，最終鎖定問題！

就是springboot里面已經內置了websocket相關服務，我們重新匯入的依賴會沖突，

解決辦法我們在pom.xml檔案里面添加一串代碼

<plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-surefire-plugin</artifactId>
      <configuration>
          <skip>true</skip>
      </configuration>
</plugin>

位置》

最新最全教程來了

更新時間2021年8月20日15:49:48
最新更新了私信功能！實作私信功能！實作私信功能！

• 首先我們來看看效果圖
  

我重新添加了兩個按鈕，一個是群聊，一個是私聊，我們進入頁面初始化的頁面就是群聊，我們點擊私聊進入后可以看見如圖·：

選擇你想要私聊的物件就可以與他私聊！想要回到群聊，我們就點擊群聊按鈕就可以了，

• 代碼分析
  

這個地方我加了一個型別判斷，判斷是群聊，還是私聊

這兩個按鈕就是來控制頁面是群聊還是私聊的還進行了變數的控制
然后就是發送訊息的按鈕進行修改

我們現在去后端看看代碼



后端代碼更改地方就這些，現在我們來看看全部代碼

后端

package com.nx.study.springstudy.bean;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import net.sf.json.JSONObject;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestParam;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;

@ServerEndpoint("/websocket/{username}")
@Component
public class Myws {

    private static Map<String, Myws> webSocketSet = new ConcurrentHashMap<String, Myws>();
    private static Map<String, Session> map = new HashMap<String, Session>();
    private static List<String> namelist = new ArrayList<String>();
    private static JSONObject jsonObject = new JSONObject();
    private static JSONObject jsonObject2 = new JSONObject();
    private static List<String> nm_msg = new ArrayList<String>();
    private SocketMsg socketMsg;

    private Session session;
    private String name;

    @OnOpen
    public void onpen(Session session, @PathParam(value = "username") String username){
        if(username == null){
            username = "游客";
        }
        this.session = session;
//        this.name = "南" + getname();
        this.name = username;

        webSocketSet.put(name, this);
        map.put(username, session);

        namelist.clear();  // 清空原來的資訊
        setonlion();
        jsonObject.put("onlinepp", namelist);
        String message = jsonObject.toString();
        broadcast2(message);

    }

    @OnClose
    public void onclose(){
        webSocketSet.remove(this.name);  // 移除物件

        namelist.clear();
        setonlion();
        jsonObject.clear();

        jsonObject.put("onlinepp", namelist);
        String message = jsonObject.toString();
        broadcast3(message);
    }

    @OnMessage
    public void onmessage(String message){

        String[] message2 = message.split("-");
        String type = message2[0];
        String newmessage = message2[1];
        String tousername = message2[2];

        if(type.equals("q")){
            nm_msg.clear();
            jsonObject2.clear();

            nm_msg.add(name);
            nm_msg.add(newmessage);
            nm_msg.add("q");  // 判斷
            nm_msg.add(tousername);  // 占位置防止報錯
            jsonObject2.put("chat", nm_msg);
            String message3 = jsonObject2.toString();
            broadcast(message3);
        }else if(type.equals("s")){
            nm_msg.clear();
            jsonObject2.clear();

            nm_msg.add(name);
            nm_msg.add(newmessage);
            nm_msg.add("s");
            nm_msg.add(tousername);

            jsonObject2.put("chat", nm_msg);
            String message3 = jsonObject2.toString();
            broadcast4(message3, tousername);
        }

    }


    @OnError
    public void one rror(Session session, Throwable error) {
        System.out.println("發生錯誤");
        error.printStackTrace();
    }

    public void broadcast(String message){
        for (Map.Entry<String, Myws> item : webSocketSet.entrySet()){
            item.getValue().session.getAsyncRemote().sendText(message);
        }
    }

    public void broadcast2(String message){
        for (Map.Entry<String, Myws> item : webSocketSet.entrySet()){
            item.getValue().session.getAsyncRemote().sendText(message);
        }
    }

    public void broadcast3(String message){
        for (Map.Entry<String, Myws> item : webSocketSet.entrySet()){
            if (!item.getKey().equals(name)){
                item.getValue().session.getAsyncRemote().sendText(message);
            }
        }
    }

    public void broadcast4(String message, String tousername){  // 私聊
        webSocketSet.get(tousername).session.getAsyncRemote().sendText(message);  // 接收者
        webSocketSet.get(name).session.getAsyncRemote().sendText(message);  // 發送者
    }

    public void setonlion(){
        for (Map.Entry<String, Myws> item : webSocketSet.entrySet()){
                namelist.add(item.getKey());
        }
    }

    public String getname() {
        String linkNo = "";
        // 用字符陣列的方式隨機
        String model = "小大天明畫美麗豪子余多少浩然兄弟朋友美韻紫萱好人壞蛋誤解不要停棲棲遑遑可";
        char[] m = model.toCharArray();
        for (int j = 0; j < 2; j++) {
            char c = m[(int) (Math.random() * 36)];
            // 保證六位亂數之間沒有重復的
            if (linkNo.contains(String.valueOf(c))) {
                j--;
                continue;
            }
            linkNo = linkNo + c;
        }
        return linkNo;
    }


}

前端

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">

<head>
    <link rel="icon" type="image/x-icon" th:href="@{/img/user/head/favicon.ico}" />
    <script th:src="@{webjars/jquery/3.1.1/jquery.min.js}"></script>
    <script th:src="@{webjars/bootstrap/3.3.7/js/bootstrap.min.js}"></script>
    <link rel="stylesheet" th:href="@{webjars/bootstrap/3.3.7/css/bootstrap.min.css}" />
    <link th:href="@{/css/home.css}" rel="stylesheet" type="text/css" />
    <meta charset="UTF-8">
    <title>在線聊天室</title>
</head>
<body>
<div class="container-fluid">
    <div style="width: 100%;height: 100px;text-align: center;margin-bottom: 30px;color: #495e6a;box-shadow: 0px 0px 10px #000000">
        <br>
        <h1>文明用語，快樂你我他</h1>
    </div>
    <div style="width: 800px;height: 600px;margin: auto;background-color: #dce9f6;box-shadow: 0px 0px 10px #707074;display: flex">
        <div style="width: 200px;height: 600px;background-color: #d4d1d1">
            <div style="width: 160px;height: 40px;margin: auto;margin-top: 10px;text-align: center">
<!--                <span class="glyphicon glyphicon-globe" style="font-size: 30px;padding-top: 2px;padding-bottom: 2px"></span>-->
<!--                <span style="font-size: 30px">群聊</span>-->
                <button id="btn4" class="btn btn-danger" style="margin-top: 10px;float: left">私信</button>
                <button id="btn5" class="btn btn-success" style="margin-top: 10px;float: right">群聊</button>
            </div>
            <div style="width: 160px;height: 40px;margin: auto;margin-top: 10px;background-color: #fdffff;text-align: center;box-shadow: 0px 0px 10px #474749;border-radius: 4px">
                <span class="glyphicon glyphicon-star" style="font-size: 30px;padding-top: 2px;padding-bottom: 2px"></span>
                <span style="font-size: 30px" th:text="${Springuser.username}">游客</span>
            </div>
            <hr>
            <div id="online" style="width: 200px;height: 500px;word-break: break-word;overflow: auto">

            </div>
        </div>
        <div style="width: 600px;height: 600px">
            <div style="width: 600px;height: 500px;padding: 20px 20px 20px 20px;word-break: break-word;overflow: auto" id="message">

            </div>
            <div style="width: 600px;height: 500px;padding: 20px 20px 20px 20px;word-break: break-word;overflow: auto;display: none;background-color: #efcbc0" id="message2">
                <div style="width: 560px;height: 40px;text-align: center">
                    <select class="btn btn-default dropdown-toggle" id="selectname">
                    </select>
                </div>
                <hr>
            </div>
            <div style="width: 600px;height: 100px;background-color: #ddf1d7;display: flex">
                <div style="width: 100px;height: 100px;text-align: center;background-color: #f5d2d2">
                    <button id="btn1" class="btn btn-success" style="margin-top: 5px">連接上線</button><br>
                    <br>
                    <button id="btn2" class="btn btn-danger">下線</button>
                </div>
                <div style="width: 500px;height: 100px;padding: 10px 10px 10px 10px" class="input-group">
                    <input id="msg" type="text" class="form-control" placeholder="在這里輸入想說的話吧！" /><br>
                    <button id="btn3" class="btn btn-info" style="margin-top: 10px;float: right">發送訊息</button>
                </div>
            </div>
        </div>
    </div>
    <div class="div2" style="margin-top: 30px;background-color: #ffffff">
        <br><br>
        <a href="#"><span style="color: #000000;">關于我們</span></a>&nbsp;|&nbsp;
        <a href="mailto: 2251798294@qq.com" style="color: #000000;">找我合作</a><br>
        <a href="http://beian.miit.gov.cn" style="color: #202223;">贛ICP備2021004042號</a>
    </div>
</div>
</body>
<script th:inline="javascript" language='javascript'>
    $(document).ready(function(){
        var select;
        var fromuser = "";
        var type = "q";
        var username = [[${Springuser.username}]];
        var websocket = null;
        $("#btn1").click(function(){
            //判斷當前瀏覽器是否支持WebSocket
            if(select === 1){
                alert("你已連接上線路，無需重復連接！")
            }else {
                if ('WebSocket'in window) {
                    // wenhaosuper.top:8000
                    websocket = new WebSocket("ws://wenhaosuper.top:8000/websocket/" + username);
                    alert("歡迎-->" + username + "<--成功上線！");
                    select = 1;
                } else {
                    alert('Not support websocket')
                }
            }
            //連接發生錯誤的回呼方法
            websocket.onerror = function() {
                alert("錯誤");
            };

            //連接成功建立的回呼方法
            websocket.onopen = function() {
            }

            //接收到訊息的回呼方法
            websocket.onmessage = function(event) {
                var touser = $("#selectname").val();
                var msg = event.data
                var obj = JSON.parse(msg);
                var zxname = obj.onlinepp;
                var chat = obj.chat;
                if (zxname != null){
                    onlinename(zxname);
                }
                if (chat != null){
                    if (chat[2] === "q"){
                        setchat(chat);
                    }else if (chat[2] === "s" && chat[3] === username){
                        setchat2(chat);
                    }else if(chat[2] === "s" && chat[3] === touser){
                        setchat2(chat);
                    }

                }
            }

            //連接關閉的回呼方法
            websocket.onclose = function() {
                alert("離開");
                select = 2;
                $("#online").empty();

            }
            //監聽視窗關閉事件，當視窗關閉時，主動去關閉websocket連接，防止連接還沒斷開就關閉視窗，server端會拋例外，
            window.onbeforeunload = function() {
                websocket.onclose;
                websocket.close();
            }
        });

        //將訊息顯示在網頁上 // 群聊
        function setchat(message) {
            $("<div style=\"width: 560px;min-height: 40px;display: flex;margin-bottom: 20px\">\n" +
                "                    <div style=\"width: 40px;height: 40px;background-color: #ffffff;text-align: center;border-radius: 20px\">\n" +
                "                        <span style=\"font-size: 28px;margin-top: 9px\"><strong>N</strong></span>\n" +
                "                    </div>\n" +
                "                    <div style=\"min-height: 40px;margin-left: 10px\">\n" +
                "                        <div style=\"height: 18px\">\n" +
                "                            <span style=\"color: #7f7777;font-size: 14px\">"+message[0]+"</span>\n" +
                "                        </div>\n" +
                "                        <div style=\"min-height: 20px;word-break: break-word;background-color: #ffffff;padding: 10px 10px 10px 10px;border-radius: 6px\">\n" +
                "                            <span>"+message[1]+"</span>\n" +
                "                        </div>\n" +
                "                    </div>\n" +
                "                </div>").appendTo("#message");
        }

        //將訊息顯示在網頁上 // 私聊
        function setchat2(message) {
            $("<div style=\"width: 560px;min-height: 40px;display: flex;margin-bottom: 20px\">\n" +
                "                    <div style=\"width: 40px;height: 40px;background-color: #ffffff;text-align: center;border-radius: 20px\">\n" +
                "                        <span style=\"font-size: 28px;margin-top: 9px\"><strong>N</strong></span>\n" +
                "                    </div>\n" +
                "                    <div style=\"min-height: 40px;margin-left: 10px\">\n" +
                "                        <div style=\"height: 18px\">\n" +
                "                            <span style=\"color: #7f7777;font-size: 14px\">"+message[0]+"</span>\n" +
                "                        </div>\n" +
                "                        <div style=\"min-height: 20px;word-break: break-word;background-color: #ffffff;padding: 10px 10px 10px 10px;border-radius: 6px\">\n" +
                "                            <span>"+message[1]+"</span>\n" +
                "                        </div>\n" +
                "                    </div>\n" +
                "                </div>").appendTo("#message2");
        }

        function onlinename(obj){
            $("#online").empty();
            $("#selectname").empty();
            obj.forEach(function (e){
                $("<div style=\"width: 160px;height: 40px;margin: auto;margin-top: 10px;background-color: #fdffff;text-align: center;box-shadow: 0px 0px 10px #474749;border-radius: 4px;overflow: hidden\">\n" +
                    "                <span class=\"glyphicon glyphicon-user\" style=\"font-size: 30px;padding-top: 2px;padding-bottom: 2px\"></span>\n" +
                    "                <span style=\"font-size: 26px\">"+e+"</span>\n" +
                    "            </div>").appendTo("#online");
                $("<option value="+e+">"+e+"</option>").appendTo("#selectname");
            });
        }

        $("#btn2").click(function(){
            websocket.close();
        });
        //發送訊息

        $("#btn3").click(function(){
            var touser = $("#selectname").val();
            if (touser == null){
                alert("你必須選擇一位好友，或者自己和自己聊聊天？");
            }else {
                var message = type + "-" + $("#msg").val() + "-" + touser;
                websocket.send(message);
                $("#msg").val("");
            }
        });

        $("#btn4").click(function (){  // 私聊
            type = "s";
            $("#message").hide();
            $("#message2").show();
        });

        $("#btn5").click(function (){  // 群聊
            type = "q";
            $("#message").show();
            $("#message2").hide();
        });



    });
</script>
</html>

嗯嗯就大概上面這么多了前端要注意幾個我更改的地方

• 最后大家欣賞一下效果圖吧
  
  **

最新更新

時間2021年8月20日23:10:51
因為收到很多小伙伴是私信，要求給githup鏈接，好的今天它來了，我重新新建了一個專案單獨把這個功能拉出來了，大家自行下載！下載后用idea打開就可以，然后瀏覽器打開頁面就可以了

githup鏈接獻上：https://github.com/nanxiang11/WebSocket_Test

如果大家有不懂的地方可以隨時了私信我哦！感謝