怎样启动JDBC Debug模式，打印JDBC诊断日志

	/**配置log文件*/
			Handler fh = new FileHandler("./oracle_jdbc_log.log");
			fh.setLevel(Level.ALL);
			fh.setFormatter(new SimpleFormatter());
			Logger.getLogger("").addHandler(fh);
			Logger.getLogger("").setLevel(Level.ALL);

import javax.management.Attribute;
import javax.management.AttributeNotFoundException;
import javax.management.InstanceNotFoundException;
import javax.management.InvalidAttributeValueException;
import javax.management.MBeanException;
import javax.management.MBeanServer;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.ReflectionException;

public void run() throws SQLException {
		DriverManager.registerDriver(new OracleDriver());
		//需在载入OracleDriver之后开启log
		enableOracleLogging();
		Connection conn = null;
		Statement stmt = null;
		ResultSet rset = null;
		try {
			conn = getConnection();
			System.out.println("Connection retrieved..");
			stmt = conn.createStatement();
			rset = stmt.executeQuery("select empno from emp");
			while (rset.next()) {
				System.out.println(rset.getInt(1));
			}
		} catch (SQLException sqle) {
			sqle.printStackTrace();
		} finally {
			if (rset != null) {
				rset.close();
			}
			if (stmt != null) {
				stmt.close();
			}
			if (conn != null) {
				conn.close();
			}
		}
	}
public static void enableOracleLogging() {
		try {
			/** 配置log文件 */
			Handler fh = new FileHandler("./oracle_jdbc_log.log");
			fh.setLevel(Level.ALL);
			fh.setFormatter(new SimpleFormatter());
			Logger.getLogger("").addHandler(fh);
			Logger.getLogger("").setLevel(Level.ALL);
			/** oracle 11g 启动方法 */
			MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
			String loader = Thread.currentThread().getContextClassLoader().toString().replaceAll("[,=:\"]+", "");
			ObjectName pattern = new ObjectName("com.oracle.jdbc:type=diagnosability,name=" + loader);
			ObjectName diag = ((ObjectName[]) (mbs.queryNames(pattern, null).toArray(new ObjectName[0])))[0];
			mbs.setAttribute(diag, new Attribute("LoggingEnabled", true));
			System.out.println("LoggingEnabled = " + mbs.getAttribute(diag, "LoggingEnabled"));
			/** oracle 10g 启动方法 */
			// oracle.jdbc.driver.OracleLog.setTrace(true); // enable logging
			// oracle.jdbc.driver.OracleLog.setTrace(false); // disable logging

		} catch (Exception e) {
			e.printStackTrace();
		}
	}