WebSocket基于Tomcat7的程序
2023-05-22
當我開始學習GUISOCKET編程時，我一直有一個夢想，我希望有一天我能在WEB上實現(xiàn)這個聊天程序。雖然QQ等很多聊天程序已經實現(xiàn)，但是他們的實現(xiàn)都是AJAX，無非是改進AJAX或者使用FLEX。個人覺得實現(xiàn)起來太復雜了，沒有研究??！幾個星期前，我整天都有時間學習，用jetty編寫聊天程序，然后聊天就實現(xiàn)了。然而，jetty服務器從未使用過。中間服務器差不多用了一個星期，讓我很糾結。最后，我可以在實驗室的電腦上成功運行?。?！但可悲的是，當我移植到我的筆記本上時，卻出現(xiàn)了各種奇怪的錯誤??！所以，我又糾結了，今晚，奇跡發(fā)現(xiàn)tomcat居然也支持了，所以真的安裝了tomcat7.0.27次測試，驚人的發(fā)現(xiàn)類似于jetty的實現(xiàn)，于是寫了一個小測試程序，測試成功??！以下是我的代碼，有興趣的童鞋可以一起學習哦！?。?！
index.jsp
1. <%@ page language='java' import='java.util.*' pageEncoding='UTF-8'%>
2. <%
3. String path = request.getContextPath();
4. "://"
5. ":"
6. "/";
7. %>
8.
9.
10.
11.
12. My JSP 'index.jsp'
15. <meta http-equiv='pragma' content='no-cache'>
16. <meta http-equiv='cache-control' content='no-cache'>
17. <meta http-equiv='expires' content='0'>
18. <meta http-equiv='keywords' content='keyword1,keyword2,keyword3'>
19. <meta http-equiv='description' content='This is my page'>
20.
50. </head>
51.
52. <body οnlοad='startServer()'>
53. "text" id="msg" value="" size="20"
54. "button" οnclick="sendMessage();" value="發(fā)送"
55. </body>
56. </html></code></pre>
</div>
<p> 具體實現(xiàn)servlet：</p><p><br></p>
<p> <br></p><p><br></p>
<p> <br></p><p><br></p>
<p> </p><p><br></p>
<div>
<pre><code>1. import
2. import
3. import
4. import
5.
6. import
7. import
8.
9. import
10. import
11. import
12.
13. /**
14. * Tomcat7 簡單的WebSocket應用， WebSocket的servlet接口集成自webSocketServlet，其本質是Serlet。
15. * <p>功能性描述，這部分必須以中文句點結束。<p>
16. *
17. * 創(chuàng)建日期 2013-7-21<br>
18. * @author longgangbai <br>
19. * @version $Revision$ $Date$
20. * @since 3.0.0
21. */
22. public class WebSocketExtServlet extends
23. org.apache.catalina.websocket.WebSocketServlet {
24. //
25. private Logger logger=Logger.getLogger(WebSocketExtServlet.class.getSimpleName());
26.
27. private static final long
28.
29.
30. @Override
31. protected
32. ";request ws servelt");
33.
34. return new
35. @Override
36. protected void onClose(int
37. ";web socket closed :" status);
38. }
39. @Override
40. protected void
41. ";web socket onOpen !");
42. }
43. @Override
44. protected void onBinaryMessage(ByteBuffer buff) throws
45. // TODO Auto-generated method stub
46. ";web socket Received : !" buff.remaining());
47. }
48.
49. @Override
50. protected void onTextMessage(CharBuffer buff) throws
51. ";web socket Received : !" buff.remaining());
52. //getWsOutbound可以回到目前的WsOutbound，通過他將數(shù)據(jù)返回到客戶端，以下是nio的CharBuffer
53. for (int j = 0; j < 50; j ) {
54. try
55. 2000);
56. this.getWsOutbound().writeTextMessage(CharBuffer.wrap(String.valueOf(j)));
57. catch
58. // TODO Auto-generated catch block
59. e.printStackTrace();
60. }
61. }
62.
63. }
64.
65. };
66. }
67.
68. }</code></pre>
</div>
<p> </p><p><br></p>
<p> </p><p><br></p>
<p> <br></p><p><br></p>
<p> <br></p><p><br></p>
<p> <br></p><p><br></p>
<ol>
<li></li>
</ol>
<div>
<pre><code>1. <?xml version='1.0' encoding='UTF-8'?>
2. <web-app xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns='http://java.sun.com/xml/ns/javaee' xmlns:web='http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd' xsi:schemaLocation='http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd' id='WebApp_ID' version='2.5'>
3. <display-name>Tomcat7WebSocket</display-name>
4. <servlet>
5. <servlet-name>websocket</servlet-name>
6. class>com.easyway.websocket.WebSocketExtServlet</servlet-class>
7. </servlet>
8. <servlet-mapping>
9. <servlet-name>websocket</servlet-name>
10. <url-pattern>/echo.ws</url-pattern>
11. </servlet-mapping>
12. <welcome-file-list>
13. <welcome-file>index.html</welcome-file>
14. <welcome-file>index.htm</welcome-file>
15. <welcome-file>index.jsp</welcome-file>
16. default.html</welcome-file>
17. default.htm</welcome-file>
18. default.jsp</welcome-file>
19. </welcome-file-list>
20. </web-app></code></pre>
</div>
<p> <br></p><p><br></p>
<p> <br> 需要注意的是，在研發(fā)過程中，必須在tomcatlib目錄下復制2個JAR包：catalina.jar tomcat-coyote.jar<br>但是在你運行的時候一定要把這兩個包刪掉，否則，就會和tomcat的包矛盾??！<br> 她們的關系，也有一定的了解，今天暫時寫到這里吧！</p><p><br></p>
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