如何建立一个html5 webscoket 实时语音聊天系统

发布网友 发布时间:2022-04-23 08:02

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懂视网 时间:2022-04-20 04:54

昨天使用HTML5的websocket与Tomcat实现了多人聊天,那是最简单也是最基本的,其中注意的就是开发环境,要满足jdk1.7和tomcat8,当然了tom7 的7.063也行!

本文主要和大家介绍HTML5 WebSocket实现点对点聊天的示例代码的相关资料,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧,希望能帮助到大家。

因为是模拟的,这里给出的是两个JSP页面A和B,里面分别向session里放了两个名字小明和小化,注意,这里的session是HttpSession session,之前多人聊天里的session是javax.websocket.Session;不一样的。

这里想一下, 使用HttpSession session控制聊天的用户,好处怎样,自己猜~~~

这里没有使用注解,传统的web.xml配置方式,首先在系统启动的时候调用InitServlet方法


public class InitServlet extends HttpServlet {
 private static final long serialVersionUID = -3163557381361759907L; 
 private static HashMap<String,MessageInbound> socketList; 
 public void init(ServletConfig config) throws ServletException { 
 InitServlet.socketList = new HashMap<String,MessageInbound>(); 
 super.init(config); 
 System.out.println("初始化聊天容器"); 
 } 

 public static HashMap<String,MessageInbound> getSocketList() { 
 return InitServlet.socketList; 
 } 
}

这里你可以跟自己的系统结合,对应的web配置代码如下:


<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
 http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

 <servlet>
 <servlet-name>websocket</servlet-name>
 <servlet-class>socket.MyWebSocketServlet</servlet-class>
 </servlet>
 <servlet-mapping>
 <servlet-name>websocket</servlet-name>
 <url-pattern>*.do</url-pattern>
 </servlet-mapping>

 <servlet>
 <servlet-name>initServlet</servlet-name>
 <servlet-class>socket.InitServlet</servlet-class>
 <load-on-startup>1</load-on-startup><!--方法执行的级别-->
 </servlet>
 <welcome-file-list>
 <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>
</web-app>

这就是最普通的前台像后台发送请求的过程,也是很容易嵌入到自己的系统里

MyWebSocketServlet:


public class MyWebSocketServlet extends WebSocketServlet {
 public String getUser(HttpServletRequest request){
 String userName = (String) request.getSession().getAttribute("user");
 if(userName==null){
  return null;
 }
 return userName; 
 } 
 protected StreamInbound createWebSocketInbound(String arg0,
  HttpServletRequest request) {
 System.out.println("用户" + request.getSession().getAttribute("user") + "登录");
 return new MyMessageInbound(this.getUser(request)); 
 }
}

MyMessageInbound继承MessageInbound


package socket;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.util.HashMap;
import org.apache.catalina.websocket.MessageInbound;
import org.apache.catalina.websocket.WsOutbound;
import util.MessageUtil;
public class MyMessageInbound extends MessageInbound {
 private String name;
 public MyMessageInbound() {
 super();
 }

 public MyMessageInbound(String name) {
 super();
 this.name = name;
 }

 @Override 
 protected void onBinaryMessage(ByteBuffer arg0) throws IOException { 

 } 

 @Override 
 protected void onTextMessage(CharBuffer msg) throws IOException { 
 //用户所发消息处理后的map
 HashMap<String,String> messageMap = MessageUtil.getMessage(msg); //处理消息类
 //上线用户集合类map
 HashMap<String, MessageInbound> userMsgMap = InitServlet.getSocketList();
 String fromName = messageMap.get("fromName"); //消息来自人 的userId
 String toName = messageMap.get("toName");  //消息发往人的 userId
 //获取该用户
 MessageInbound messageInbound = userMsgMap.get(toName); //在仓库中取出发往人的MessageInbound
 MessageInbound messageFromInbound = userMsgMap.get(fromName);
 if(messageInbound!=null && messageFromInbound!=null){ //如果发往人 存在进行操作
  WsOutbound outbound = messageInbound.getWsOutbound(); 
  WsOutbound outFromBound = messageFromInbound.getWsOutbound();
  String content = messageMap.get("content"); //获取消息内容
  String msgContentString = fromName + "说: " + content; //构造发送的消息
  //发出去内容
  CharBuffer toMsg = CharBuffer.wrap(msgContentString.toCharArray());
  CharBuffer fromMsg = CharBuffer.wrap(msgContentString.toCharArray());
  outFromBound.writeTextMessage(fromMsg);
  outbound.writeTextMessage(toMsg); //
  outFromBound.flush();
  outbound.flush();
 }
 } 

 @Override 
 protected void onClose(int status) { 
 InitServlet.getSocketList().remove(this); 
 super.onClose(status); 
 } 

 @Override
 protected void onOpen(WsOutbound outbound) { 
 super.onOpen(outbound); 
 //登录的用户注册进去
 if(name!=null){
  InitServlet.getSocketList().put(name, this);//存放客服ID与用户
 }
 }

 @Override
 public int getReadTimeout() {
 return 0;
 } 
}

在onTextMessage中处理前台发出的信息,并封装信息传给目标

还有一个messageutil


package util;
import java.nio.CharBuffer;
import java.util.HashMap;
public class MessageUtil {
 public static HashMap<String,String> getMessage(CharBuffer msg) {
 HashMap<String,String> map = new HashMap<String,String>();
 String msgString = msg.toString();
 String m[] = msgString.split(",");
 map.put("fromName", m[0]);
 map.put("toName", m[1]);
 map.put("content", m[2]);
 return map;
 }
}

当然了,前台也要按照规定的格式传信息


<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Index</title>
<script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>
<%session.setAttribute("user", "小化");%>
<script type="text/javascript">
var ws = null;
function startWebSocket() {
 if ('WebSocket' in window)
 ws = new WebSocket("ws://localhost:8080/WebSocketUser/websocket.do");
 else if ('MozWebSocket' in window)
 ws = new MozWebSocket("ws://localhost:8080/WebSocketUser/websocket.do");
 else
 alert("not support");


 ws.onmessage = function(evt) {
 //alert(evt.data);
 console.log(evt);
 // $("#xiaoxi").val(evt.data);
 setMessageInnerHTML(evt.data);
 };
 function setMessageInnerHTML(innerHTML){
 document.getElementById('message').innerHTML += innerHTML + '<br/>';
 }
 ws.onclose = function(evt) {
 //alert("close");
 document.getElementById('denglu').innerHTML="离线";
 };

 ws.onopen = function(evt) {
 //alert("open");
 document.getElementById('denglu').innerHTML="在线";
 document.getElementById('userName').innerHTML='小化';
 };
}
function sendMsg() {
 var fromName = "小化";
 var toName = document.getElementById('name').value; //发给谁
 var content = document.getElementById('writeMsg').value; //发送内容
 ws.send(fromName+","+toName+","+content);//注意格式
}
</script>
</head>
<body onload="startWebSocket();">
<p>聊天功能实现</p>
登录状态:
<span id="denglu" style="color:red;">正在登录</span>
<br>
登录人:
<span id="userName"></span>
<br>
<br>
<br>
发送给谁:<input type="text" id="name" value="小明"></input>
<br>
发送内容:<input type="text" id="writeMsg"></input>
<br>
聊天框:<p id="message" style="height: 250px;width: 280px;border: 1px solid; overflow: auto;"></p>
<br>
<input type="button" value="send" onclick="sendMsg()"></input>
</body>
</html>

这是A.jsp页面,B同上

通过以上代码,就可以实现一个点对点的聊天功能,如果做的大,可以做成一个web版的聊天系统,包括聊天室和单人聊天,都说websocket不支持二进制的传输,但是看到个大流说了这样的话

不过现在做下来 感觉使用二进制的意义不是很大。很久以前就一直困混,怎么都说JS不支持二进制,发现其实只是一堆坑货对这个没研究。。(用的是filereader)

热心网友 时间:2022-04-20 02:02

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
var wsServer = 'ws://localhost:9999/webSocket.ashx'; //基于.NET4.5服务器地址
//var wsServer = 'ws://localhost:1818'; //基于.NET服务器地址

var websocket = new WebSocket(wsServer); //创建WebSocket对象
//websocket.send("hello");//向服务器发送消息
//alert(websocket.readyState);//查看websocket当前状态
websocket.onopen = function (evt) {
//已经建立连接
alert("已经建立连接");
};
websocket.onclose = function (evt) {
//已经关闭连接
alert("已经关闭连接");
};
websocket.onmessage = function (evt) {
//收到服务器消息,使用evt.data提取
evt.stopPropagation()
evt.preventDefault()
//alert(evt.data);
writeToScreen(evt.data);
//websocket.close();
};
websocket.onerror = function (evt) {
//产生异常
//alert(evt.message);
writeToScreen(evt.message);
};
function sendMsg() {
if (websocket.readyState == websocket.OPEN) {
msg = document.getElementById("msg").value;
websocket.send(msg);
writeToScreen("发送成功!");
} else {
writeToScreen("连接失败!");
}
}

function writeToScreen(message) {
var pre = document.createElement("p");
pre.style.wordWrap = "break-word";
pre.innerHTML += message;
output.appendChild(pre);
}
</script>
</head>
<body>
<div>
<input type="text" id="msg" value="beyond is number one!" />
<button onclick="sendMsg()">send</button>
</div>
<div id="output"></div>
</body>
</html>
H5e实训html5开发解答

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