有使用过JMX实时修改wblogic连接池密码的么？

系统使用jndi通过weblogic81连接池访问数据库。
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碰到的问题
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由于安全原因，数据库密码会定期修改，这样导致weblogic服务重新启动后无法连接到数据库。
由于部署了weblogic的机器众多，不希望一台台连上去通过console修改密码，而是通过部署在weblogic中的
一个jar包自动获得正确的密码，然后更新weblogic的config.xml文件，同时刷新连接池，使其能够正常工作。
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现状
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已经能够使用JMX修改连接池密码了（见modifyAdmin方法），但连接池仍无法正常使用。请高手指教，帮顶有分：

package weblogic;



import java.util.Properties;



import javax.management.InstanceNotFoundException;

import javax.management.InvalidAttributeValueException;

import javax.naming.Context;

import javax.naming.NamingException;



import weblogic.jndi.Environment;

import weblogic.management.MBeanHome;

import weblogic.management.configuration.JDBCConnectionPoolMBean;



/**

 * 测试调用weblogic api直接修改config.xml

 * 

 * 

 */

public class ConfigOperator {



	/**

	 * @param args

	 */

	public static void main(String[] args) {

		//modifyAdmin("user", "pass");

		modifyConfig("user", "pass");

		System.out.println("test finished");

	}



	public static void modifyConfig(String userName, String password) {

		try {

			String poolName = "MyJDBC Connection Pool";

			MBeanHome home = getMBeanHome();

			JDBCConnectionPoolMBean mConfigBean = (JDBCConnectionPoolMBean) home

					.getConfigurationMBean(poolName, "JDBCConnectionPoolConfig");

			Properties nameProperty = new Properties();

			nameProperty.setProperty("name", userName);

			mConfigBean.setProperties(nameProperty);

			mConfigBean.setPassword(password);

			System.out.println(mConfigBean.getPassword());

			//mConfigBean.setDriverName("helloworld1");

		} catch (InvalidAttributeValueException iave) {

			System.out.println("Invalid attribute while configuring tracing "

					+ iave);

		} catch (InstanceNotFoundException infe) {

			System.out.println("Instance not found while configuring tracing "

					+ infe);

		} catch (Exception e) {

			System.out.println(e);

		}

	}

	

	public static void modifyAdmin(String userName, String password) {

		try {

			String poolName = "MyJDBC Connection Pool";

			MBeanHome home = getMBeanHome();

			JDBCConnectionPoolMBean mConfigBean = (JDBCConnectionPoolMBean) home

					.getAdminMBean(poolName, "JDBCConnectionPool");

			Properties nameProperty = new Properties();

			nameProperty.setProperty("name", userName);

			mConfigBean.setProperties(nameProperty);

			mConfigBean.setPassword(password);

			//mConfigBean.setDriverName("helloworld1");

		} catch (InvalidAttributeValueException iave) {

			System.out.println("Invalid attribute while configuring tracing "

					+ iave);

		} catch (InstanceNotFoundException infe) {

			System.out.println("Instance not found while configuring tracing "

					+ infe);

		} catch (Exception e) {

			System.out.println(e);

		}

	}



	private static MBeanHome getMBeanHome() {

		String url = "t3://localhost:7001";

		String username = "weblogic";

		String password = "weblogic";

		MBeanHome home = null;



		try {

			Environment env = new Environment();

			env.setProviderUrl(url);

			env.setSecurityPrincipal(username);

			env.setSecurityCredentials(password);

			Context ctx = env.getInitialContext();

			home = (MBeanHome) ctx.lookup(MBeanHome.LOCAL_JNDI_NAME);

		} catch (NamingException ne) {

			System.out.println("Error getting MBeanHome " + ne);

		}

		return home;

	}



}