win7（64位）SQLDeveloper工具连接数据库提示：IO错误：The Network Adapter could not establish the connection
SQLDeveloper工具是个免安装的软件，直接解压运行sqldeveloper.exe即可。 连接数据库时提示错误 “IO错误：The Network Adapter could not establish the connection ” 解决方法： 查询oracle 11g 安装路径XXXX\network\admin里面有个文件tnsnames.ora的配置。 发现配置连接中的端口号是1
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