配置好后，PL/SQL Developer登录窗口的Database下拉框里就能看到ORCL这个连接标识符，输入用户名密码即可登录。 如果你不想配tnsnames.ora，也可以直接用EZ Connect格式，在Database框里填IP、端口和服务名，比如 127.0.0.1:1521/orcl ，这种方式适合快速连一个临时环境。

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