如何使用 powershell 编写正则表达式以仅替换 tnsnames.ora 中的主机名

Question

(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))(CONNECT_DATA = (SERVICE_NAME = ora)))

我想使用 powershell 将 HOST 名称替换为新值，谢谢

Answer 1

使用运算符：

$str = '(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))(CONNECT_DATA = (SERVICE_NAME = ora)))'

$str -replace '(?<=\(HOST = )[^)]+', 'newhost'

Answer 2

它使用与 mklement0 相同的 -replace 运算符，但为像我这样的正则表达式挑战的人使用更简单的模式。 [咧嘴一笑]

$OldHost = 'myhost'
$NewHost = 'NewHostName'

$InStuff = '(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))(CONNECT_DATA = (SERVICE_NAME = ora)))'

$OutStuff = $InStuff -replace "HOST = $OldHost", "HOST = $NewHost"

$InStuff
$OutStuff

输出...

(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))(CONNECT_DATA = (SERVICE_NAME = ora)))
(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = NewHostName)(PORT = 1521))(CONNECT_DATA = (SERVICE_NAME = ora)))

如何使用 powershell 编写正则表达式以仅替换 tnsnames.ora 中的主机名

How to write a regular expression to replace only the HOST name in the tnsnames.ora using powershell

regex

powershell

tnsnames