给出一个例程吧

(1)它需要Jboss的jbossall-client.jar包的支持

(2)运行环境为Jboss3.2.6 + jdk5.0 + eclipse3.2M2。jdk5.0内置了JMX支持，如果你不是jdk5.0的话eclipse可能会报有会类找不到的错误

(3)之前必须选启动Jboss

importjava.util.Iterator;importjava.util.Properties;importjava.util.Set;importjavax.management.MBeanInfo;importjavax.management.MBeanOperationInfo;importjavax.management.MBeanParameterInfo;importjavax.management.ObjectInstance;importjavax.management.ObjectName;importjavax.naming.InitialContext;importorg.jboss.jmx.adaptor.rmi.RMIAdaptor;publicclassTestJMX {publicstaticvoidmain(String[] args)throwsException {//Get RMIAdaptor ObjectProperties pro=newProperties();

pro.setProperty("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");

pro.setProperty("java.naming.provider.url","jnp://localhost:1099");

pro.setProperty("java.naming.factory.url.pkgs","org.jboss.naming:org.jnp.interfaces");

InitialContext ic=newInitialContext(pro);

RMIAdaptor server=(RMIAdaptor) ic.lookup("jmx/rmi/RMIAdaptor");//Get the MBeanInfo for the JNDIView MBeanObjectName name=newObjectName("jboss:service=JNDIView");

MBeanInfo info=server.getMBeanInfo(name);

System.out.println("JNDIView Class:"+info.getClassName());

MBeanOperationInfo[] opInfo=info.getOperations();

System.out.println("JNDIView Operations:");for(into=0; o

MBeanOperationInfo op=opInfo[o];

String returnType=op.getReturnType();

String opName=op.getName();

System.out.print("+"+returnType+""+opName+"(");

MBeanParameterInfo[] params=op.getSignature();for(intp=0; p

MBeanParameterInfo paramInfo=params[p];

String pname=paramInfo.getName();

String type=paramInfo.getType();if(pname.equals(type))

System.out.print(type);elseSystem.out.print(type+""+name);if(p

System.out.print(',');

}

System.out.println(")");

}//Get all MBeansSet mbSet=server.queryMBeans(null,null);//for(Iterator it=mbSet.iterator(); it.hasNext();) {

ObjectInstance oi=(ObjectInstance) it.next();

System.out.println(oi.getObjectName());

}

}

这里有一段网上找到的代码,正好是实现了配置文件修改后重读的功能.

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.net.URL;

import java.util.Properties;

/**

* @author Robbin Fan

*/

public class ConfigUtil {

private static Properties props = null;

private static File configFile = null;

private static long fileLastModified = 0L;

private static void init() {

URL url = ConfigUtil.class.getClassLoader().getResource("global.properties");

configFile = new File(url.getFile());

fileLastModified = configFile.lastModified();

props = new Properties();

load();

}

private static void load() {

try {

props.load(new FileInputStream(configFile));

fileLastModified = configFile.lastModified();

} catch (IOException e) {

throw new RuntimeException(e);

}

}

public static String getConfig(String key) {

if ((configFile == null) || (props == null))

init();

if (configFile.lastModified() > fileLastModified)

load();

return props.getProperty(key);

}

}

如果MBean就在本地，则可以用下面的方法来获得：

ThreadPoolMBean poolMBean = (ThreadPoolMBean) MBeanProxyExt.create(ThreadPoolMBean.class, objName);

还有一种远程获得的方法(从开源代码中看到的，未验证)

ThreadPoolMBean poolMBean = (ThreadPoolMBean) MBeanServerInvocationHandler.newProxyInstance(mbeanServer, objName, ThreadPoolMBean.class, false);