上节课讲了群聊,此次来说说单聊,单聊要比群聊复杂点,然则代码也不是许多,主假如前端显现比较贫苦点。
结果:
上岸
起首一个新的用户,须要先上岸,输入本身的昵称,然后点击上岸。后端效劳会把你的用户名和当前的线程举行邦定,如许就能够经由过程你的用户名找到你的线程。上岸胜利,后端返回定义好的音讯 success
,前端推断纪录CHAT.me
,如许给他人发音讯时就能够照顾本身的信息。
查找用户
在输入框输入用户名,就能够返回对应的用户的线程,如许你就能够把音讯发送给你要谈天的对象。假如不存在,后端回返回音讯给前端,该用户不存在。假如存在,就纪录此用户名到CHAT.to
中,如许你发送音讯的时刻就能够发送给对应用户了。
最先谈天
发送谈天信息时me:to:音讯
,如许后端就晓得是谁要发给谁,依据用户名去找到细致的线程去零丁推送音讯,完成单聊。
前端待完美
左边谈天列表没有完成,每搜刮一个在线用户,应当动态显现在左边,点击该用户,动态显现右边谈天窗口举行音讯发送。现在是你和一切人的单聊音讯都邑显现在右边,没有完成拆分,由于这是一个页面,处置惩罚起来比较贫苦,我一个后端就不花时间搞了,感兴趣的能够本身去完成。
前端代码
由于谛视比较细致,就直接复制全部代码到这里,人人本身看。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>单人谈天</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/zui/1.8.1/css/zui.min.css">
<link rel="stylesheet" href="zui-theme.css">
</head>
<body>
<div class="container">
<div class="row"> <h1>mike单人谈天室,等你来聊</h1></div>
<div class="row">
<div class="input-control has-icon-left has-icon-right" style="width:50%;">
<input id="userName" type="text" class="form-control" placeholder="谈天昵称">
<label for="inputEmailExample1" class="input-control-icon-left"><i class="icon icon-user"></i></label>
<label for="inputEmailExample1" class="input-control-icon-right"><a onclick="login()">上岸</a></label>
</div>
</div>
<br>
<div class="row">
<div class="input-control search-box search-box-circle has-icon-left has-icon-right" id="searchUser">
<input id="inputSearch" type="search" class="form-control search-input" placeholder="输入在线挚友昵称谈天...enter最先查找">
<label for="inputSearchExample1" class="input-control-icon-left search-icon"><i class="icon icon-search"></i></label>
<a href="#" class="input-control-icon-right search-clear-btn"><i class="icon icon-remove"></i></a>
</div>
</div>
<hr>
<div class="row">
<div class="col-lg-3">
<p class="with-padding bg-success">谈天列表</p>
<div class="list-group">
<a href="#" class="list-group-item">
<h4 class="list-group-item-heading"><i class="icon-user icon-2x"></i> may</h4>
</a>
<a href="#" class="list-group-item active">
<h4 class="list-group-item-heading"><i class="icon-user icon-2x"></i> steve</h4>
</a>
</div>
</div>
<div class="col-lg-1"></div>
<div class="col-lg-8">
<div class="comments">
<section class="comments-list" id="chatlist">
</section>
<footer>
<div class="reply-form" id="commentReplyForm1">
<a href="###" class="avatar"><i class="icon-user icon-2x"></i></a>
<form class="form">
<div class="form-group">
<textarea id="inputMsg" class="form-control new-comment-text" rows="2" value="" placeholder="最先谈天... 输入enter 发送音讯"></textarea>
</div>
</form>
</div>
</footer>
</div>
</div>
</div>
</div>
<!-- ZUI Javascript 依靠 jQuery -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/zui/1.8.1/lib/jquery/jquery.js"></script>
<!-- ZUI 规范版压缩后的 JavaScript 文件 -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/zui/1.8.1/js/zui.min.js"></script>
<script type="text/javascript">
window.CHAT = {
isLogin: false,
to: "",
me: "",
WS:{},
init: function () {
if (window.WebSocket) {
this.WS = new WebSocket("ws://A156B7L58CCNY4B:8090/ws");
this.WS.onmessage = function(event) {
var data = event.data;
console.log("收到数据:" + data);
//返回搜刮音讯
if(data.indexOf("search") != -1){
new $.zui.Messager('提醒音讯:'+data, {
type: 'info' // 定义色彩主题
}).show();
if(data.indexOf("已找到")){ //能够举行会话
CHAT.to = data.split(":")[1];
}
}
//返回上岸音讯
if(data == "success"){
CHAT.isLogin = true;
new $.zui.Messager('提醒音讯:上岸胜利', {
type: 'success' // 定义色彩主题
}).show();
//衔接胜利不再修正昵称
$("#userName").attr("disabled","disabled");
CHAT.me = $("#userName").val();
}
//返回谈天信息
if (data.split(":").length==3 && CHAT.me == data.split(":")[1]) {
CHAT.to = data.split(":")[0]; //设置对话
appendOtherchat(data);
}
},
this.WS.onclose = function(event) {
console.log("衔接封闭");
CHAT.isLogin = false;
$("#userName").removeAttr("disabled");
new $.zui.Messager('提醒音讯:谈天中缀', {
type: 'danger' // 定义色彩主题
}).show();
},
this.WS.onopen = function(evt) {
console.log("Connection open ...");
},
this.WS.onerror = function(event) {
console.log("衔接失利....");
CHAT.isLogin = false;
$("#userName").removeAttr("disabled");
new $.zui.Messager('提醒音讯:谈天中缀', {
type: 'danger' // 定义色彩主题
}).show();
}
} else {
alert("您的浏览器不支持谈天,请替换浏览器");
}
},
chat:function (msg) {
this.WS.send(msg);
}
}
CHAT.init();
function login() {
var userName = $("#userName").val();
if (userName != null && userName !='') {
//初始化谈天
CHAT.chat("init:"+userName);
} else {
alert("请输入用户名登录");
}
}
function Trim(str) {
return str.replace(/(^\s*)|(\s*$)/g, "");
}
function appendMy (msg) { //拼接本身的谈天内容
document.getElementById('chatlist').innerHTML+="<div class='comment'><a class='avatar pull-right'><i class='icon-user icon-2x'></i></a><div class='content pull-right'><div><strong>我</strong></div><div class='text'>"+msg+"</div></div></div>";
}
function appendOtherchat(msg) { //拼接他人的谈天信息到谈天室
var msgs = msg.split(":");
document.getElementById('chatlist').innerHTML+="<div class='comment'><a class='avatar'><i class='icon-user icon-2x'></i></a><div class='content'><div><strong>"+msgs[0]+"</strong></div><div class='text'>"+msgs[2]+"</div></div></div>";
}
//搜刮在线职员发送音讯
document.getElementById("inputSearch").addEventListener('keyup', function(event) {
if (event.keyCode == "13") {
//回车实行查询
CHAT.chat("search:"+$('#inputSearch').val());
}
});
//发送谈天音讯
document.getElementById('inputMsg').addEventListener('keyup', function(event) {
if (event.keyCode == "13") {
//回车实行查询
var inputMsg = $('#inputMsg').val();
if (inputMsg == null || Trim(inputMsg) == "" ) {
alert("请输入谈天音讯");
} else {
var userName = $('#userName').val();
if (userName == null || userName == '') {
alert("请输入谈天昵称");
} else {
//发送音讯 定义音讯花样 me:to:[音讯]
CHAT.chat(userName+":"+CHAT.to+":"+inputMsg);
appendMy(inputMsg);
//发送完清空输入
document.getElementById('inputMsg').focus();
document.getElementById('inputMsg').value="";
}
}
}
});
</script>
</body>
</html>
后端革新
- 到场一个
UserMap
,邦定user和Channel
package netty;
import java.util.HashMap;
import java.util.Map;
import io.netty.channel.Channel;
/**
* The class UserMap
*/
public class UserMap {
private HashMap<String, Channel> users = new HashMap();
private static UserMap instance;
public static UserMap getInstance () {
if (instance == null) {
instance = new UserMap();
}
return instance;
}
private UserMap () {
}
public void addUser(String userId, Channel ch) {
this.users.put(userId, ch);
}
public Channel getUser (String userId) {
return this.users.get(userId);
}
public void deleteUser (Channel ch) {
for (Map.Entry<String, Channel> map: users.entrySet()) {
if (map.getValue() == ch) {
users.remove(map.getKey());
break;
}
}
}
}
-
ChatHandler
革新
package netty;
import java.time.LocalDateTime;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.group.ChannelGroup;
import io.netty.channel.group.DefaultChannelGroup;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaderValues;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.HttpVersion;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketFrame;
import io.netty.util.concurrent.GlobalEventExecutor;
/**
*
*/
public class ChatHandler extends SimpleChannelInboundHandler{
public static ChannelGroup channels = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);
public static UserMap usermap = UserMap.getInstance();
/**
* 每当从效劳端收到新的客户端衔接时,客户端的 Channel 存入ChannelGroup列表中,并关照列表中的其他客户端 Channel
*/
@Override
public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
Channel incoming = ctx.channel();
for (Channel channel : channels) {
channel.writeAndFlush("[SERVER] - " + incoming.remoteAddress() + " 到场\n");
}
channels.add(ctx.channel());
}
/**
* 每当从效劳端收到客户端断开时,客户端的 Channel 移除 ChannelGroup 列表中,并关照列表中的其他客户端 Channel
*/
@Override
public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
Channel incoming = ctx.channel();
for (Channel channel : channels) {
channel.writeAndFlush("[SERVER] - " + incoming.remoteAddress() + " 脱离\n");
}
channels.remove(ctx.channel());
}
/**
* 会话建立时
*/
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception { // (5)
Channel incoming = ctx.channel();
System.out.println("ChatClient:"+incoming.remoteAddress()+"在线");
}
/**
* 会话结束时
*/
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception { // (6)
Channel incoming = ctx.channel();
System.out.println("ChatClient:"+incoming.remoteAddress()+"掉线");
//消灭离线用户
this.usermap.deleteUser(incoming);
}
/**
* 出现非常
*/
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { // (7)
Channel incoming = ctx.channel();
System.out.println("ChatClient:"+incoming.remoteAddress()+"非常");
// 当出现非常就封闭衔接
cause.printStackTrace();
ctx.close();
}
/**
* 读取客户端发送的音讯,并将信息转发给其他客户端的 Channel。
*/
@Override
protected void channelRead0(ChannelHandlerContext ctx, Object request) throws Exception {
if (request instanceof FullHttpRequest) { //是http要求
FullHttpResponse response = new DefaultFullHttpResponse(
HttpVersion.HTTP_1_1,HttpResponseStatus.OK , Unpooled.wrappedBuffer("Hello netty"
.getBytes()));
response.headers().set("Content-Type", "text/plain");
response.headers().set("Content-Length", response.content().readableBytes());
response.headers().set("connection", HttpHeaderValues.KEEP_ALIVE);
ctx.channel().writeAndFlush(response);
} else if (request instanceof TextWebSocketFrame) { // websocket要求
//此处id为neety自动分配给每一个对话线程的id,有两种,一个长id一个短id,长id唯一,短id能够会反复
String userId = ctx.channel().id().asLongText();
//客户端发送过来的音讯
String msg = ((TextWebSocketFrame)request).text();
System.out.println("收到客户端"+userId+":"+msg);
//发送音讯给一切客户端 群聊
//channels.writeAndFlush(new TextWebSocketFrame(msg));
// 邦定user和channel
// 定义每一个上线用户主动发送初始化信息过来,照顾本身的name,然后完成绑定 模子 init:[usrname]
// 现实场景中应当运用user唯一id
if (msg.indexOf("init") != -1) {
String userNames[] = msg.split(":");
if ("init".equals(userNames[0])) { // 纪录新的用户
this.usermap.addUser(userNames[1].trim(), ctx.channel());
ctx.channel().writeAndFlush(new TextWebSocketFrame("success"));
}
}
//搜刮在线用户 音讯模子 search:[username]
if (msg.indexOf("search") != -1) {
Channel ch = this.usermap.getUser(msg.split(":")[1].trim());
if (ch != null) { //此用户存在
ctx.channel().writeAndFlush(new TextWebSocketFrame("search:"+msg.split(":")[1].trim()+":已找到"));
} else { // 此用户不存在
ctx.channel().writeAndFlush(new TextWebSocketFrame("search:"+msg.split(":")[1].trim()+":未找到"));
}
}
//发送音讯给指定的用户 音讯模子 me:to:[msg]
if (msg.split(":").length == 3) { //推断是单聊音讯
this.usermap.getUser(msg.split(":")[1].trim()).writeAndFlush(new TextWebSocketFrame(msg));
}
//ctx.channel().writeAndFlush(new TextWebSocketFrame(((TextWebSocketFrame)request).text()));
}
}
}
解释很细致,本身看
总结
音讯模子应当定义一个零丁的类来治理,我现在是用的String
字符串来推断,提早划定了一些模子,经由过程推断来相应前端的要求,比较简单。另有就是没有运用数据库,前端不能显现谈天纪录,不能完成音讯的已读未读。现实场景中应当对音讯举行加密存储,且不能窥伺用户隐私。
前端能够运用localstorage
来存储谈天纪录,本身能够扩大。
前端的显现能够有点题目,本身能够调。实在主假如进修netty后端的搭建
别忘了关注我 mike啥都想搞
求关注啊。