如何在Powershell中逐个字符串拆分 [英] How to split string by string in Powershell

问题描述

我试图用一个分隔符来吐出字符串，这是一个字符串:

I'm trying to spit the string with a delimiter, which is a string:

$string = "5637144576, messag<>est<<>>5637145326, 1<<>>5637145328, 0"
$separator = "<<>>"
$string.Split($separator)

作为分裂的结果，我得到:

As the result of splitting I get:

5637144576, messag

est



5637145326, 1



5637145328, 0

代替

5637144576, messag<>est
5637145326, 1
5637145328, 0

当我尝试使用接受 string[] 的重载拆分时:

When I try to use overloaded split which accepts string[]:

$string = "5637144576, messag<>est<<>>5637145326, 1<<>>5637145328, 0"
$separator = @("<<>>")
$string.Split($separator)

但我得到下一个错误:

Cannot convert argument "0", with value: "System.Object[]", for "Split" to type "System.Char[]": "Cannot convert value "<<>>" to type "System.Char". Error: "String must be exactly one character long.""

有人知道如何按字符串拆分字符串吗?

Does someone knows how to split string by string?

推荐答案

-split 运算符使用字符串进行拆分，而不是像 Split() 这样的字符数组:

The -split operator uses the string to split, instead of a chararray like Split():

$string = "5637144576, messag<>est<<>>5637145326, 1<<>>5637145328, 0"
$separator = "<<>>"
$string -split $separator

5637144576, messag<>est
5637145326, 1
5637145328, 0

如果你想对字符串使用Split()方法，你需要$seperator是一个只有一个元素的stringarray，并且还要指定一个stringsplitoptions值.您可以通过检查其定义来看到这一点:

If you want to use the Split() method with a string, you need the $seperator to be a stringarray with one element, and also specify a stringsplitoptions value. You can see this by checking its definition:

$string.Split

OverloadDefinitions                                                                                
-------------------                                                                                
string[] Split(Params char[] separator)                                                            
string[] Split(char[] separator, int count)                                                        
string[] Split(char[] separator, System.StringSplitOptions options)                                
string[] Split(char[] separator, int count, System.StringSplitOptions options)                     

#This one
string[] Split(string[] separator, System.StringSplitOptions options)      
string[] Split(string[] separator, int count, System.StringSplitOptions options)


$string = "5637144576, messag<>est<<>>5637145326, 1<<>>5637145328, 0"
$separator = [string[]]@("<<>>")
$string.Split($separator, [System.StringSplitOptions]::RemoveEmptyEntries)

5637144576, messag<>est
5637145326, 1
5637145328, 0

正如@RomanKuzmin 指出的那样，-split 默认使用正则表达式模式进行拆分.所以请注意转义特殊字符(例如 . 在正则表达式中是任何字符").您还可以强制 simplematch 禁用正则表达式匹配，例如:

As @RomanKuzmin pointed out, -split splits using regex-patterns by default. So be aware to escape special characters (ex. . which in regex is "any character"). You could also force simplematch to disable regex-matching like:

$separator = "<<>>"
$string -split $separator, 0, "simplematch"

阅读有关 -split 的更多信息此处.

Read more about -split here.

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