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Jetty WebSockets中的Jar/Class问题

javawebsocketjettyembedded-jetty
4

我遇到了WebSocket的问题。使用Java开发环境IntelliJ IDEA Community Edition 12.1.6，使用Jetty 9.1.0和Maven。 我创建了两个类（下面是代码）。 类WsHandler：

public class WsHandler extends WebSocketHandler {
private final ConcurrentMap<String, Set<EventWebSocket>> eventsSubscribers = new ConcurrentHashMap<>();

@Override
public WebSocket doWebSocketConnect(HttpServletRequest request, String protocol) {
    return new EventWebSocket();
}

private void fireEvent(String eventName) {
    Set<EventWebSocket> subscribers = eventsSubscribers.get(eventName);
    System.out.println("Event " + eventName + " was occurred. Subscribers " + subscribers);
    if (subscribers != null) {
        for (EventWebSocket webSocket : subscribers) {
            webSocket.onEvent(eventName);
        }
    }
}

public final class EventWebSocket implements WebSocket.OnTextMessage {

    private Connection connection;
    private List<String> subscribedEvents = new LinkedList();

    @Override
    public void onOpen(Connection connection) {
        System.out.println("Open connection " + connection);
        this.connection = connection;
    }

    @Override
    public void onMessage(String data) {
        System.out.println("Process msg: " + data);
        if (data.isEmpty()) return;
        if (data.startsWith("Sub")) { // subscribe
            if (data.length() < 5) return;
            String eventName = data.split(":")[1]; // subscribing message format "Sub:EventName"
            Set<EventWebSocket> subscribers = eventsSubscribers.get(eventName);
            // double-check idiom for lazy initialization
            if (subscribers == null) {
                synchronized (EventHandler.class) {
                    if (eventsSubscribers.get(eventName) == null) {
                        subscribers = new CopyOnWriteArraySet<>();
                        eventsSubscribers.putIfAbsent(eventName, subscribers);
                    }
                }
            }
            subscribers.add(this);
            subscribedEvents.add(eventName);
        } else if (data.startsWith("Fire")) { // fire event
            if (data.length() < 6) return;
            String eventName = data.split(":")[1]; // Fire event message format "Fire:EventName"
            fireEvent(eventName);
        } else {
            try {
                connection.sendMessage("Unknown command: " + data);
            } catch (IOException ex) {
                System.err.println("Ooops: " + ex + ". Close connection " + connection);
            }
        }
    }

    public void onEvent(String eventName) {
        try {
            connection.sendMessage("Event " + eventName + " was occurred");
        } catch (IOException ex) {
            System.err.println("Ooops: " + ex + ". Close connection " + connection);
        }
    }

    @Override
    public void onClose(int closeCode, String message) {
        System.out.println("Close connection " + connection);
        // remove from subscribers
        for (String eventName : subscribedEvents) {
            eventsSubscribers.get(eventName).remove(this);
        }
    }
}}

简单的Echo客户端类：

public class SimpleEchoClient {

public static void main(String[] args) throws Exception {

    Server server = new Server(8080);
    WsHandler handler = new WsHandler();
    server.setHandler(handler);
    server.start();
    server.join();
}}

运行代码时出现错误：

    "C:\Program Files\Java\jdk1.7.0_17\bin\java" -Didea.launcher.port=7532 "-Didea.launcher.bin.path=C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 12.1.6\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.7.0_17\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\jce.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\jfxrt.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\resources.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\rt.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\zipfs.jar;C:\Users\Alexandr.Alexandr-PC\Documents\java\Shooter\target\classes;C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 12.1.6\lib\junit-4.10.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\freemarker\freemarker\2.3.19\freemarker-2.3.19.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-server\9.1.0.M0\jetty-server-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\javax\servlet\javax.servlet-api\3.1.0\javax.servlet-api-3.1.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-http\9.1.0.M0\jetty-http-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-util\9.1.0.M0\jetty-util-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-io\9.1.0.M0\jetty-io-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-webapp\9.1.0.M0\jetty-webapp-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-xml\9.1.0.M0\jetty-xml-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-servlet\9.1.0.M0\jetty-servlet-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-security\9.1.0.M0\jetty-security-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-rewrite\9.1.0.M0\jetty-rewrite-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-client\9.1.0.M0\jetty-client-9.1.0.M0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\mockito\mockito-all\1.8.4\mockito-all-1.8.4.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-java\2.4.0\selenium-java-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-android-driver\2.4.0\selenium-android-driver-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-remote-driver\2.4.0\selenium-remote-driver-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\cglib\cglib-nodep\2.1_3\cglib-nodep-2.1_3.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\json\json\20080701\json-20080701.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-api\2.4.0\selenium-api-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\com\google\guava\guava\r09\guava-r09.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\apache\httpcomponents\httpclient\4.0.2\httpclient-4.0.2.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\apache\httpcomponents\httpcore\4.0.1\httpcore-4.0.1.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-logging\commons-logging\1.1.1\commons-logging-1.1.1.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-codec\commons-codec\1.4\commons-codec-1.4.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-chrome-driver\2.4.0\selenium-chrome-driver-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-htmlunit-driver\2.4.0\selenium-htmlunit-driver-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\sourceforge\htmlunit\htmlunit\2.8\htmlunit-2.8.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\xalan\xalan\2.7.1\xalan-2.7.1.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\xalan\serializer\2.7.1\serializer-2.7.1.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\xml-apis\xml-apis\1.3.04\xml-apis-1.3.04.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-collections\commons-collections\3.2.1\commons-collections-3.2.1.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-lang\commons-lang\2.4\commons-lang-2.4.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\apache\httpcomponents\httpmime\4.0.1\httpmime-4.0.1.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\apache\james\apache-mime4j\0.6\apache-mime4j-0.6.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\sourceforge\htmlunit\htmlunit-core-js\2.8\htmlunit-core-js-2.8.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\xerces\xercesImpl\2.9.1\xercesImpl-2.9.1.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\sourceforge\nekohtml\nekohtml\1.9.14\nekohtml-1.9.14.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\sourceforge\cssparser\cssparser\0.9.5\cssparser-0.9.5.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\w3c\css\sac\1.3\sac-1.3.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-io\commons-io\2.0.1\commons-io-2.0.1.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-firefox-driver\2.4.0\selenium-firefox-driver-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-ie-driver\2.4.0\selenium-ie-driver-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\java\dev\jna\jna\3.2.3\jna-3.2.3.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-iphone-driver\2.4.0\selenium-iphone-driver-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-support\2.4.0\selenium-support-2.4.0.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\junit\junit\4.11\junit-4.11.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-websocket\7.4.4.v20110707\jetty-websocket-7.4.4.v20110707.jar;C:\Users\Alexandr.Alexandr-PC\.m2\repository\javax\servlet\servlet-api\2.5\servlet-api-2.5.jar;C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 12.1.6\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain servlets.SimpleEchoClient
2013-12-01 00:52:53.727:INFO:oejs.Server:main: jetty-9.1.0.M0
2013-12-01 00:52:53.747:WARN:oejuc.AbstractLifeCycle:main: FAILED servlets.WsHandler@267a1e1c: java.lang.NoClassDefFoundError: org/eclipse/jetty/http/HttpException
java.lang.NoClassDefFoundError: org/eclipse/jetty/http/HttpException
    at org.eclipse.jetty.websocket.WebSocketHandler.doStart(WebSocketHandler.java:76)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:118)
    at org.eclipse.jetty.server.Server.start(Server.java:342)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:100)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:58)
    at org.eclipse.jetty.server.Server.doStart(Server.java:290)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
    at servlets.SimpleEchoClient.main(SimpleEchoClient.java:26)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: 
java.lang.ClassNotFoundException: org.eclipse.jetty.http.HttpException
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at org.eclipse.jetty.websocket.WebSocketHandler.doStart(WebSocketHandler.java:76)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:118)
    at org.eclipse.jetty.server.Server.start(Server.java:342)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:100)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:58)
    at org.eclipse.jetty.server.Server.doStart(Server.java:290)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
    at servlets.SimpleEchoClient.main(SimpleEchoClient.java:26)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
2013-12-01 00:52:53.748:WARN:oejuc.AbstractLifeCycle:main: FAILED org.eclipse.jetty.server.Server@1b4ed400: java.lang.NoClassDefFoundError: org/eclipse/jetty/http/HttpException
java.lang.NoClassDefFoundError: org/eclipse/jetty/http/HttpException
    at org.eclipse.jetty.websocket.WebSocketHandler.doStart(WebSocketHandler.java:76)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:118)
    at org.eclipse.jetty.server.Server.start(Server.java:342)
    at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:100)
    at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:58)
    at org.eclipse.jetty.server.Server.doStart(Server.java:290)
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:69)
    at servlets.SimpleEchoClient.main(SimpleEchoClient.java:26)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

这个问题可能与什么有关？提前感谢您。
你尝试过将代码缩短为仍能重现问题的最短形式吗？你真的认为有人愿意浏览所有这些代码吗？ - John Dvorak
@JanDvorak 的代码和错误信息对于那些使用Jetty的人来说是微不足道和显而易见的。问题本身是信息丰富的，与stackoverflow上的许多问题相反。 - Joakim Erdfelt
1个回答
14

首先，将您的命令行分解以使其易读：

"C:\Program Files\Java\jdk1.7.0_17\bin\java" 
  -Didea.launcher.port=7532 
  "-Didea.launcher.bin.path=C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 12.1.6\bin" 
  -Dfile.encoding=UTF-8 
  -classpath "C:\Program Files\Java\jdk1.7.0_17\jre\lib\charsets.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\deploy.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\javaws.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\jce.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\jfr.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\jfxrt.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\jsse.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\management-agent.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\plugin.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\resources.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\rt.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\access-bridge-64.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\dnsns.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\jaccess.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\localedata.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\sunec.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\sunjce_provider.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\sunmscapi.jar
    C:\Program Files\Java\jdk1.7.0_17\jre\lib\ext\zipfs.jar
    C:\Users\Alexandr.Alexandr-PC\Documents\java\Shooter\target\classes
    C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 12.1.6\lib\junit-4.10.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\freemarker\freemarker\2.3.19\freemarker-2.3.19.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-server\9.1.0.M0\jetty-server-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\javax\servlet\javax.servlet-api\3.1.0\javax.servlet-api-3.1.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-http\9.1.0.M0\jetty-http-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-util\9.1.0.M0\jetty-util-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-io\9.1.0.M0\jetty-io-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-webapp\9.1.0.M0\jetty-webapp-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-xml\9.1.0.M0\jetty-xml-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-servlet\9.1.0.M0\jetty-servlet-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-security\9.1.0.M0\jetty-security-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-rewrite\9.1.0.M0\jetty-rewrite-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-client\9.1.0.M0\jetty-client-9.1.0.M0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\mockito\mockito-all\1.8.4\mockito-all-1.8.4.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-java\2.4.0\selenium-java-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-android-driver\2.4.0\selenium-android-driver-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-remote-driver\2.4.0\selenium-remote-driver-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\cglib\cglib-nodep\2.1_3\cglib-nodep-2.1_3.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\json\json\20080701\json-20080701.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-api\2.4.0\selenium-api-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\com\google\guava\guava\r09\guava-r09.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\apache\httpcomponents\httpclient\4.0.2\httpclient-4.0.2.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\apache\httpcomponents\httpcore\4.0.1\httpcore-4.0.1.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-logging\commons-logging\1.1.1\commons-logging-1.1.1.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-codec\commons-codec\1.4\commons-codec-1.4.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-chrome-driver\2.4.0\selenium-chrome-driver-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-htmlunit-driver\2.4.0\selenium-htmlunit-driver-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\sourceforge\htmlunit\htmlunit\2.8\htmlunit-2.8.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\xalan\xalan\2.7.1\xalan-2.7.1.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\xalan\serializer\2.7.1\serializer-2.7.1.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\xml-apis\xml-apis\1.3.04\xml-apis-1.3.04.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-collections\commons-collections\3.2.1\commons-collections-3.2.1.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-lang\commons-lang\2.4\commons-lang-2.4.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\apache\httpcomponents\httpmime\4.0.1\httpmime-4.0.1.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\apache\james\apache-mime4j\0.6\apache-mime4j-0.6.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\sourceforge\htmlunit\htmlunit-core-js\2.8\htmlunit-core-js-2.8.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\xerces\xercesImpl\2.9.1\xercesImpl-2.9.1.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\sourceforge\nekohtml\nekohtml\1.9.14\nekohtml-1.9.14.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\sourceforge\cssparser\cssparser\0.9.5\cssparser-0.9.5.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\w3c\css\sac\1.3\sac-1.3.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\commons-io\commons-io\2.0.1\commons-io-2.0.1.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-firefox-driver\2.4.0\selenium-firefox-driver-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-ie-driver\2.4.0\selenium-ie-driver-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\net\java\dev\jna\jna\3.2.3\jna-3.2.3.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-iphone-driver\2.4.0\selenium-iphone-driver-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\seleniumhq\selenium\selenium-support\2.4.0\selenium-support-2.4.0.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\junit\junit\4.11\junit-4.11.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\org\eclipse\jetty\jetty-websocket\7.4.4.v20110707\jetty-websocket-7.4.4.v20110707.jar
    C:\Users\Alexandr.Alexandr-PC\.m2\repository\javax\servlet\servlet-api\2.5\servlet-api-2.5.jar
    C:\Program Files (x86)\JetBrains\IntelliJ IDEA Community Edition 12.1.6\lib\idea_rt.jar" 
  com.intellij.rt.execution.application.AppMain servlets.SimpleEchoClient

并且你的程序的第一行输出

2013-12-01 00:52:53.727:INFO:oejs.Server:main: jetty-9.1.0.M0

你有多个事情要处理。

1. 您正在运行混合版本的Jetty。您的jetty websockets版本为7.4.4.v20110707，而其余部分为9.1.0.M0。 2. 您应该升级到Jetty 9.1的最终版本（非里程碑版，非发布候选版），以获得最成熟的websocket实现。这将是jetty 9.1.0.v20131115。 3. 您的代码示例是早期草案实现的websocket，并显示您正在查看一些非常古老的代码示例。建议您不要使用那个早已过时的API。 4. 您的Java版本过旧。1.7更新17在6月份就过期了（是的，Java版本会过期。请阅读发行说明。例如：u40 expires on 12/10/2013，和u45 expires on 1/14/2014）。 5. 使用现代Jetty WebSocket API或javax.websocket标准API。

现代 Jetty WebSocket API

已经设置了一个示例项目：

https://github.com/jetty-project/embedded-jetty-websocket-examples/tree/master/native-jetty-websocket-example

你需要的Maven依赖：

<!-- To write basic websockets against -->
<dependency>
  <groupId>org.eclipse.jetty.websocket</groupId>
  <artifactId>websocket-api</artifactId>
  <version>9.1.0.v20131115</version>
</dependency>
<!-- To run websockets in embedded server -->
<dependency>
  <groupId>org.eclipse.jetty.websocket</groupId>
  <artifactId>websocket-server</artifactId>
  <version>9.1.0.v20131115</version>
</dependency>
<!-- To run websockets client -->
<dependency>
  <groupId>org.eclipse.jetty.websocket</groupId>
  <artifactId>websocket-client</artifactId>
  <version>9.1.0.v20131115</version>
</dependency>

看一下示例代码。

  • EventServer.java - 这是jetty嵌入式服务器代码，用于初始化处理程序树+ServletContext。它将EventServlet映射到路径规范"/events/*"
  • EventServlet.java - 这只是简单地向Servlet注册了EventSocket（为背景说明，WebSocketServletFactory具有一个简单的默认实现WebSocketCreator，仅支持1个websocket。 .register(Class<?>)调用只是告诉这个默认的WebSocketCreator要创建哪个WebSocket。如果您想要一个更复杂的WebSocketCreator，则可以使用自己的实现调用WebSocketServletFactory.setCreator(WebSocketCreator)）
  • EventSocket.java - 实际接收传入事件的websocket
  • EventClient.java - 由于您的演示代码称为客户端，但其中包含服务器代码，因此我不太清楚您的计划，因此我还添加了一个本机Jetty WebSocket客户端示例。

Jetty上的javax.websocket标准API

一个示例项目已经设置在:

https://github.com/jetty-project/embedded-jetty-websocket-examples/tree/master/javax.websocket-example

您需要的Maven依赖项：

<!-- To write basic javax.websocket against -->
<dependency>
  <groupId>javax.websocket</groupId>
  <artifactId>javax.websocket-api</artifactId>
  <version>1.0</version>
</dependency>
<!-- To run javax.websocket in embedded server -->
<dependency>
  <groupId>org.eclipse.jetty.websocket</groupId>
  <artifactId>javax-websocket-server-impl</artifactId>
  <version>9.1.0.v20131115</version>
</dependency>
<!-- To run javax.websocket client -->
<dependency>
  <groupId>org.eclipse.jetty.websocket</groupId>
  <artifactId>javax-websocket-client-impl</artifactId>
  <version>9.1.0.v20131115</version>
</dependency>

看一下示例代码。

  • EventServer.java - 这与原生API略有不同，因为javax.websocket世界中的所有内容都基于注释进行发现。因此，这个嵌入式服务器建立了一个ServletContextHandler，然后通过调用WebSocketServerContainerInitializer.configureContext(context)来初始化javax.websocket层，最后使用addEndpoint(Class)手动添加到ServerContainer中。
  • EventSocket.java - 使用javax.websocket的注释，这个类被注释为服务器端点和客户端点，应该接收各种事件的方法也被注释为指示其所需目的。
  • EventClient.java - 这使用javax.websocket WebSocketContainer（客户端容器）连接到服务器并发送消息。（特别注意的是，额外的工作是清理WebSocketContainer的生命周期。这是JSR-356规范中缺少的功能）

祝你好运

@JoakimErdfelt：如果使用“javax.websocket标准API”，有没有指定路径规范的方法？ - eprst
1
@eprst 特定 WebSocket 端点的路径规范由 Jetty WebSocket API（支持：servlet 路径规范、uri 模板路径规范和正则表达式路径规范）和 javax.websocket API（仅支持级别 1 的 uri 模板路径规范）都支持。 - Joakim Erdfelt
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