【新手求助】JDBC部分关于连接Oracle数据库失败的问题

[半生的救赎]

求各位大神帮忙看一下是哪里的问题！
（1）Java Code

public class LoadingDriverDemo {
	public static final String DBDRIVER = "oracle.jdbc.driver.OracleDriver";
	public static final String DBURL = "jdbc:oracle:thin:@localhost:1521:mldn";	
	public static final String DBUSER = "scott";	
	public static final String PASSWORD = "tiger";	
	public static void main(String[] args) throws ClassNotFoundException, SQLException {
		//第一步：加载数据库驱动程序
		Class.forName(DBDRIVER);//向容器中加载驱动中的连接类
		//第二步：取得数据库连接对象
		Connection conn = DriverManager.getConnection(DBURL,DBUSER,PASSWORD);
		System.out.println("数据库已连接");
		//第三步：取得数据库连接对象
		Statement stmt = conn.createStatement();//创建数据库
		String sql = "INSERT INTO member(id,name,age,birthday,note)"
				+"VALUES(myseq.nextval,'张三'，"
				+"10，TO_DATE('1990-10-01','yyyy-MM-dd'),暂无";		
		int len = stmt.executeUpdate(sql);   //执行更新，返回更新行数
		System.out.println("影响的数据行数"+len);
		//第四步：关闭数据库连接
		conn.close();
	}
}

（2）运行提示错误
Exception in thread "main" java.sql.SQLException: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor

（3）确认OracleOraDb11g_home1TNSListener和OracleServiceMLDN服务都已经开启

（4）Oracle的SID确认是mldn


（5）listener.ora配置如下
# listener.ora Network Configuration File: E:\Oracle\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.


SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\Oracle\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\Oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll")
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
)

ADR_BASE_LISTENER = E:\Oracle

===================================================
在线等！急！

[自由自在_Yu]

可能就是Oracle得监听配置出了问题，打开listener.ora增加以下部分试试 SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = E:\Oracle\product\11.2.0\dbhome_1) (PROGRAM = extproc) (ENVS = "EXTPROC_DLLS=ONLY:E:\Oracle\product\11.2.0\dbhome_1\bin\oraclr11.dll") ) (SID_DESC = (GLOBAL_DBNAME = oracle) (ORACLE_HOME = E:\Oracle\product\11.2.0\dbhome_1) (SID_NAME = oracle) ) )

[半生的救赎]

还是不对啊老哥 SID我又改成mldn也不对 错误提示还是一样

[半生的救赎]

没人吗？？？

[半生的救赎]

问题解决了，把SID_NAME和GLOBLE_DBNAME都改成了mldn 就好了