我正在尝试使用com.j256.simplejmx实现简单的JMX客户端/服务器.我想使用Web浏览器监视我的对象.我复制了一段非常简单的代码：

package com.my.package.jmx;

import com.j256.simplejmx.web.JmxWebServer;

public class JMXServer {

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

        JmxWebServer jmxWebServer = new JmxWebServer(8123);
        jmxWebServer.start();
    }

}

当我运行它时,我有一个例外：

Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/jetty/util/thread/ThreadPool
    at com.my.package.jmx.JMXServer.main(JMXServer.java:9)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.util.thread.ThreadPool
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 1 more

我将此添加到我的pom.xml中：

<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-util</artifactId>
    <version>9.1.3.v20140225</version>
</dependency>

我再次运行它,然后又得到另一个惊喜：

防爆

ception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/jetty/server/AbstractConnector
    at com.my.package.jmx.JMXServer.main(JMXServer.java:9)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.server.AbstractConnector
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 1 more 

因此,再次更新我的pom.xml：

<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-server</artifactId>
    <version>9.1.3.v20140225</version>
</dependency>

它再次给我一个错误：

Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/jetty/server/nio/SelectChannelConnector
    at com.mu.package.jmx.JMXServer.main(JMXServer.java:9)
Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.server.nio.SelectChannelConnector
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 1 more

我找不到任何解决方案.我还应该添加什么到pom.xml文件中？也许依赖版本存在问题？

先感谢您.

我编辑了pom.xml

<project...> 

    <properties>
        <jetty-version>8.1.9.v20130131</jetty-version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>com.j256.simplejmx</groupId>
            <artifactId>simplejmx</artifactId>
            <version>1.8</version>
        </dependency>

        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-util</artifactId>
            <version>${jetty-version}</version>
        </dependency>

        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-server</artifactId>
            <version>${jetty-version}</version>
            <optional>true</optional>
        </dependency>

    </dependencies>

</project>

现在,我可以运行此服务器：

INFO  Server - jetty-8.1.9.v20130131
INFO  AbstractConnector - Started SelectChannelConnector@0.0.0.0:8123

但是当我进入Web浏览器并输入以下内容时：

localhost:8123

它引发异常：

WARN  nio - 
java.lang.SecurityException: class "javax.servlet.AsyncContext"'s signer information does not match signer information of other classes in the same package
    at java.lang.ClassLoader.checkCerts(Unknown Source)
    at java.lang.ClassLoader.preDefineClass(Unknown Source)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$100(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at org.eclipse.jetty.server.AbstractHttpConnection.<init>(AbstractHttpConnection.java:157)
    at org.eclipse.jetty.server.AsyncHttpConnection.<init>(AsyncHttpConnection.java:50)
    at org.eclipse.jetty.server.nio.SelectChannelConnector.newConnection(SelectChannelConnector.java:285)
    at org.eclipse.jetty.server.nio.SelectChannelConnector$ConnectorSelectorManager.newConnection(SelectChannelConnector.java:325)
    at org.eclipse.jetty.server.nio.SelectChannelConnector.newEndPoint(SelectChannelConnector.java:272)
    at org.eclipse.jetty.server.nio.SelectChannelConnector$ConnectorSelectorManager.newEndPoint(SelectChannelConnector.java:331)
    at org.eclipse.jetty.io.nio.SelectorManager$SelectSet.createEndPoint(SelectorManager.java:841)
    at org.eclipse.jetty.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:496)
    at org.eclipse.jetty.io.nio.SelectorManager$1.run(SelectorManager.java:290)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
    at java.lang.Thread.run(Unknown Source)

解决方法:

Caused by: java.lang.ClassNotFoundException: org.eclipse.jetty.server.nio.SelectChannelConnector

因此,现在SimpleJMX具有8.1.9.v20130131 Jetty的可选依赖项,以支持publishing JMX over web/HTTP.如果您查看pom.xml,您将看到：

<jetty-version>8.1.9.v20130131</jetty-version>
...
<dependency>
    <groupId>org.eclipse.jetty</groupId>
    <artifactId>jetty-server</artifactId>
    <version>${jetty-version}</version>
    <optional>true</optional>
</dependency>

您可以尝试这个版本的Jetty吗？我不确定我是否可以同时支持8.X.X和9.X.X,但我会对其进行研究.