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通过MyEclipse工具的Database Explorer的DB Browse新建了一个关于Oracle的数据库连接，分别配置了各项配置：
各项配置都配好了之后尝试连接，出现了如下的错误：
在sqlplus下允许，一切正常：
找到listener.ora文件：我的Oracle是安装在D盘，路径为：D:oracleproduct10.2.0db_1networkadminlistener.ora 修改前的配置如下：# listener.ora Network Configuration File: D:oracleproduct10.2.0db_1networkadminlistener.ora # Generated by Oracle configuration tools.SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:oracleproduct10.2.0db_1)
(PROGRAM = extproc)))
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS =(PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS =(PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))))修改后的配置如下： # listener.ora Network Configuration File: D:oracleproduct10.2.0db_1networkadminlistener.ora # Generated by Oracle configuration tools.SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:oracleproduct10.2.0db_1)
(PROGRAM = extproc))
(SID_DESC =
(GLOBAL_DBNAME = ORCL)
(ORACLE_HOME = /app/oracle/oracle/product/10.2.0/db_1)
(SID_NAME = ORCL)))
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS =(PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS =(PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))))黄色部分为增加的内容 重启监听器
最后问题解决：
