java+连接jmx,根据进程ID连接JMX，代码测试

class="java" name="code">import sun.misc.VM;

import sun.misc.VMSupport;

import java.io.IOException;

import java.net.ServerSocket;

/**

* Created by DUDU on 2018/6/12.

*/

public class Server {

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

try {

// ServerSocket ss = new ServerSocket(21000);

// String addr = System.getProperty("com.sun.management.jmxremote.localConnectorAddress");

String addr = (String) VMSupport.getAgentProperties().get("com.sun.management.jmxremote.localConnectorAddress");

System.out.println("addr1:" + addr);

if (addr == null) {

// Thread.currentThread().getContextClassLoader().loadClass("");

// Class.forName("sun.management.Agent");

sun.management.Agent.premain("");

}

addr = (String) VMSupport.getAgentProperties().get("com.sun.management.jmxremote.localConnectorAddress");

System.out.println(addr);

} catch (IOException e) {

e.printStackTrace();

} catch (ClassNotFoundException e) {

e.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

}

Thread.sleep(50000000L);

}

}

JVM在加载sun.management.Agent后，会监听一个地址，端口随机，我测试的时候是：

service:jmx:rmi://127.0.0.1/stub/rO0ABXNyAC5qYXZheC5tYW5hZ2VtZW50LnJlbW90ZS5ybWkuUk1JU2VydmVySW1wbF9TdHViAAAAAAAAAAICAAB4cgAaamF2YS5ybWkuc2VydmVyLlJlbW90ZVN0dWLp/tzJi+FlGgIAAHhyABxqYXZhLnJtaS5zZXJ2ZXIuUmVtb3RlT2JqZWN002G0kQxhMx4DAAB4cHc1AAtVbmljYXN0UmVmMgAACjEwLjEuNy4yMTcAAMptncwWe1hOy/PhQ2ADAAABY/0c42+AAQB4

注意这时候的IP和端口实际是在后面加密的串里面，前面那个127.0.0.1是骗人的

所以客户端连接程序为：

JMXServiceURL jmxUrl = new JMXServiceURL("service:jmx:rmi://127.0.0.1/stub/rO0ABXNyAC5qYXZheC5tYW5hZ2VtZW50LnJlbW90ZS5ybWkuUk1JU2VydmVySW1wbF9TdHViAAAAAAAAAAICAAB4cgAaamF2YS5ybWkuc2VydmVyLlJlbW90ZVN0dWLp/tzJi+FlGgIAAHhyABxqYXZhLnJtaS5zZXJ2ZXIuUmVtb3RlT2JqZWN002G0kQxhMx4DAAB4cHc1AAtVbmljYXN0UmVmMgAACjEwLjEuNy4yMTcAAMptncwWe1hOy/PhQ2ADAAABY/0c42+AAQB4");

JMXConnector jmxc = JMXConnectorFactory.connect(jmxUrl);