程序博客网 > 局域网ip冲突 软件

java WebSocket 简易聊天消息推送

来源：互联网 发布：局域网ip冲突 软件 编辑：程序博客网 时间：2024/05/23 19:18
        分类： HTML5WebSocket2014-11-18 20:021946人阅读评论(4)收藏举报
webSocket消息推送聊天

环境：

JDK.1.7.0_51

apache-tomcat-7.0.53

java jar包：tomcat-coyote.jar、tomcat-juli.jar、websocket-api.jar

ChatAnnotation消息发送类：

[java] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. import java.io.IOException;
  2. import java.util.HashMap;
  3. import java.util.Map;
  4. import java.util.concurrent.atomic.AtomicInteger;
  6. import javax.websocket.OnClose;
  7. import javax.websocket.OnError;
  8. import javax.websocket.OnMessage;
  9. import javax.websocket.OnOpen;
  10. import javax.websocket.Session;
  11. import javax.websocket.server.ServerEndpoint;
  13. import org.apache.juli.logging.Log;
  14. import org.apache.juli.logging.LogFactory;
  16. import com.util.HTMLFilter;
  18. /**
  19. * WebSocket 消息推送服务类
  20. * @author 胡汉三
  21. *
  22. * 2014-11-18 下午7:53:13
  23. */
  24. @ServerEndpoint(value = "/websocket/chat")
  25. public class ChatAnnotation {
  27. private staticfinal Log log = LogFactory.getLog(ChatAnnotation.class);
  29. private staticfinal String GUEST_PREFIX = "Guest";
  30. private static final AtomicInteger connectionIds = new AtomicInteger(0);
  31. private staticfinal Map<String,Object> connections = new HashMap<String,Object>();
  33. private final String nickname;
  34. private Session session;
  36. public ChatAnnotation() {
  37. nickname = GUEST_PREFIX + connectionIds.getAndIncrement();
  38. }
  41. @OnOpen
  42. public void start(Session session) {
  43. this.session = session;
  44. connections.put(nickname, this);
  45. String message = String.format("* %s %s", nickname,"has joined.");
  46. broadcast(message);
  47. }
  50. @OnClose
  51. public void end() {
  52. connections.remove(this);
  53. String message = String.format("* %s %s",
  54. nickname, "has disconnected.");
  55. broadcast(message);
  56. }
  59. /**
  60. * 消息发送触发方法
  61. * @param message
  62. */
  63. @OnMessage
  64. public void incoming(String message) {
  65. // Never trust the client
  66. String filteredMessage = String.format("%s: %s",
  67. nickname, HTMLFilter.filter(message.toString()));
  68. broadcast(filteredMessage);
  69. }
  71. @OnError
  72. public void onError(Throwable t)throws Throwable {
  73. log.error("Chat Error: " + t.toString(), t);
  74. }
  76. /**
  77. * 消息发送方法
  78. * @param msg
  79. */
  80. private static void broadcast(String msg) {
  81. if(msg.indexOf("Guest0")!=-1){
  82. sendUser(msg);
  83. } else{
  84. sendAll(msg);
  85. }
  86. }
  88. /**
  89. * 向所有用户发送
  90. * @param msg
  91. */
  92. public static void sendAll(String msg){
  93. for (String key : connections.keySet()) {
  94. ChatAnnotation client = null ;
  95. try {
  96. client = (ChatAnnotation) connections.get(key);
  97. synchronized (client) {
  98. client.session.getBasicRemote().sendText(msg);
  99. }
  100. } catch (IOException e) {
  101. log.debug("Chat Error: Failed to send message to client", e);
  102. connections.remove(client);
  103. try {
  104. client.session.close();
  105. } catch (IOException e1) {
  106. // Ignore
  107. }
  108. String message = String.format("* %s %s",
  109. client.nickname, "has been disconnected.");
  110. broadcast(message);
  111. }
  112. }
  113. }
  115. /**
  116. * 向指定用户发送消息
  117. * @param msg
  118. */
  119. public staticvoid sendUser(String msg){
  120. ChatAnnotation c = (ChatAnnotation)connections.get("Guest0");
  121. try {
  122. c.session.getBasicRemote().sendText(msg);
  123. } catch (IOException e) {
  124. log.debug("Chat Error: Failed to send message to client", e);
  125. connections.remove(c);
  126. try {
  127. c.session.close();
  128. } catch (IOException e1) {
  129. // Ignore
  130. }
  131. String message = String.format("* %s %s",
  132. c.nickname, "has been disconnected.");
  133. broadcast(message);
  134. }
  135. }
  136. }

HTMLFilter工具类：

[java] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. /**
  2. * HTML 工具类
  3. *
  4. * @author 胡汉三
  5. */
  6. public final class HTMLFilter {
  7. public static String filter(String message) {
  8. if (message == null)
  9. return (null);
  10. char content[] = newchar[message.length()];
  11. message.getChars(0, message.length(), content,0);
  12. StringBuilder result = new StringBuilder(content.length +50);
  13. for (int i =0; i < content.length; i++) {
  14. switch (content[i]) {
  15. case '<':
  16. result.append("<");
  17. break;
  18. case '>':
  19. result.append(">");
  20. break;
  21. case '&':
  22. result.append("&");
  23. break;
  24. case '"':
  25. result.append(""");
  26. break;
  27. default:
  28. result.append(content[i]);
  29. }
  30. }
  31. return (result.toString());
  32. }
  33. }

页面：

[html] view plaincopyprint?在CODE上查看代码片派生到我的代码片
  1. <%@ page language="java"import="java.util.*"pageEncoding="UTF-8"%>
  2. <%
  3. String path = request.getContextPath();
  4. String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
  5. %>
  7. <?xml version="1.0" encoding="UTF-8"?>
  8. <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
  9. <head>
  10. <title>测试</title>
  11. <style type="text/css">
  12. input#chat {
  13. width: 410px
  14. }
  16. #console-container {
  17. width: 400px;
  18. }
  20. #console {
  21. border: 1px solid #CCCCCC;
  22. border-right-color: #999999;
  23. border-bottom-color: #999999;
  24. height: 170px;
  25. overflow-y: scroll;
  26. padding: 5px;
  27. width: 100%;
  28. }
  30. #console p {
  31. padding: 0;
  32. margin: 0;
  33. }
  34. </style>
  35. <script type="text/javascript">
  37. var Chat = {};
  39. Chat.socket = null;
  41. Chat.connect = (function(host) {
  42. if ('WebSocket' in window) {
  43. Chat.socket = new WebSocket(host);
  44. } else if ('MozWebSocket' in window) {
  45. Chat.socket = new MozWebSocket(host);
  46. } else {
  47. Console.log('Error: WebSocket is not supported by this browser.');
  48. return;
  49. }
  51. Chat.socket.onopen = function () {
  52. Console.log('Info: WebSocket connection opened.');
  53. document.getElementById('chat').onkeydown =function(event) {
  54. if (event.keyCode == 13) {
  55. Chat.sendMessage();
  56. }
  57. };
  58. };
  60. Chat.socket.onclose = function () {
  61. document.getElementById('chat').onkeydown =null;
  62. Console.log('Info: WebSocket closed.');
  63. };
  65. Chat.socket.onmessage = function (message) {
  66. Console.log(message.data);
  67. };
  68. });
  70. Chat.initialize = function() {
  71. if (window.location.protocol == 'http:') {
  72. Chat.connect('ws://' + window.location.host + '/socket2/websocket/chat');
  73. } else {
  74. Chat.connect('wss://' + window.location.host + '/socket2/websocket/chat');
  75. }
  76. };
  78. Chat.sendMessage = (function() {
  79. var message = document.getElementById('chat').value;
  80. if (message != '') {
  81. Chat.socket.send(message);
  82. document.getElementById('chat').value = '';
  83. }
  84. });
  86. var Console = {};
  88. Console.log = (function(message) {
  89. var console = document.getElementById('console');
  90. var p = document.createElement('p');
  91. p.style.wordWrap = 'break-word';
  92. p.innerHTML = message;
  93. console.appendChild(p);
  94. while (console.childNodes.length > 25) {
  95. console.removeChild(console.firstChild);
  96. }
  97. console.scrollTop = console.scrollHeight;
  98. });
  100. Chat.initialize();
  103. document.addEventListener("DOMContentLoaded", function() {
  104. // Remove elements with "noscript" class - <noscript> is not allowed in XHTML
  105. var noscripts = document.getElementsByClassName("noscript");
  106. for (var i = 0; i< noscripts.length; i++) {
  107. noscripts[i].parentNode.removeChild(noscripts[i]);
  108. }
  109. }, false);
  111. </script>
  112. </head>
  113. <body>
  114. <div class="noscript"><h2style="color: #ff0000">Seems your browser doesn't support Javascript! Websockets rely on Javascript being enabled. Please enable
  115. Javascript and reload this page!</h2></div>
  116. <div>
  117. <p>
  118. <input type="text" placeholder="请输入内容"id="chat" />
  119. </p>
  120. <div id="console-container">
  121. <div id="console"/>
  122. </div>
  123. </div>
  124. </body>
  125. </html>
可指定发送给某个用户，也可全部发送，详情见ChatAnnotation类的broadcast方法。

程序发布时记得删除tomcat-coyote.jar、tomcat-juli.jar、websocket-api.jar这三个jar包在启动Tomcat。

程序截图，Guest0用户发送信息的信息，在后台进行了判断只发送给自己：


Guest1：

Guest2：

0 0
局域网ip冲突 软件 局域网ip冲突 软件
原创粉丝点击
热门IT博客
复杂sql编写方法复杂sql编写方法
c语言预指令c语言预指令
冰封三国杀淘宝
南方大数据001113净值
stc51单片机和mcs
营销推广软件
友邦高端医疗险 知乎
电影 大都会 知乎
imagelab mac
c语言enum用处
淘宝客推广工具手机版
不用交钱的手机网络兼职
淘宝网开店要钱吗
加密文件数据错误
数控怎样编程
手机网络错误怎么办
淘宝天猫卷怎么抢到
java 交换两个数
图书购买系统c语言
java中getname方法
热门问题 老师的惩罚 人脸识别 我在镇武司摸鱼那些年 重生之率土为王 我在大康的咸鱼生活 盘龙之生命进化 天生仙种 凡人之先天五行 春回大明朝 姑娘不必设防，我是瞎子 榴绽朱门 闲听落花 御林军 御林雅苑 落初年楚御林全文目录 御林苑 天正天御溪岸在哪 天正天御溪岸学区 南宁中海御湖熙岸 御景熙岸 苏州中海御湖熙岸 中海御湖熙岸怎么样 御庭水岸 水岸御景 御景水岸 御景水岸花园 峨眉山御泉湾温泉酒店 澄迈御泉名都 御水泉价目表 御水湾花园 兴华御水澜湾 御水湾酒楼 御水湾 万科城御水湾 御品谷水湾 谷水湾 秀水湾 汇水湾 御品古水湾 浙水湾 鑫水湾 汕尾陆河御水湾温泉价格 御江南 铁投江南御景 滨江御江南 江南御园 斌鑫江南御府 御江南房价 融创江南御园 2018年御景江南每平方米多少钱 买了御江南真心后悔 江南御府

程序博客网，程序员的互联网技术博客家园。csdn论坛精品 msdn技术资料都在这里