Question

我有一个类似table { color: #212121; font-size: .875rem; margin: 1.25rem 0; border-collapse: collapse; table-layout: fixed; width: 100%; border: 1px solid red; } tr { display:flex; justify-content: center; text-align:center; } tr td{ border: 1px solid blue; width:50%; } tr td span{ display:inline-block; width:50%; text-align:left; white-space:break; }的字符串，我想要获得函数名称“ str”和参数名称“ * p”，“ a”。但是，我不知道有多少个参数。

我已经为正则表达式写了String str = "void Write(int *p,int a)"。

正则表达式a)的最后一部分是删除分号和括号。但是如您所见，它失败了。我必须使用第二个拆分还是有其他方法吗？

Answer 1

这将是一个两步过程

第1步：提取功能名称和所有参数

第2步：从所有参数列表中提取每个参数名称

步骤1：

让此正则表达式^\S+\s+([^(]+)\(([^)]+)*应用于此字符串void Write(int *p,int a, int b, str *v)此测试字符串

^         # start of string
\S+       # one or more occurence of any non space charactcers
          # matches `void`
\s+       # one or more occurence of a space character
          # matches the space after `void`
([^(]+)   # all characters until opening parenthesis
          # matches `Write` and capture it
\(        # literally matches opening parenthesis
([^)]+)   # matches all characters till closing parenthesis is encountered
          # matches arguments signature i.e. `int *p,int a, int b, str *v`
*         # matches zero or more occurrence of last capturing group
          # last capturing group is string between the parenthesis
          # so this star handle the corner case when the argument list is empty

更多详细信息：https://regex101.com/r/0m1vs9/2

第2步

现在在参数列表（int *p,int a, int b, str *v）中将此正则表达式\s*\S+\s+([^,]+),?与全局修饰符一起应用

此模式匹配逗号之间的文本，因此让我们假设相同的模式进行解释

\s*      # matches zero or more occurrences of a space character
         # this will match any spaces after comma e.g. `int b,<space> str`
\S+      # one or more occurrence of non space character
         # matches argument type, i.e. `int`
\s+      # one or more occurrence of space characters
         # matches the space between argument name and type, e.g. `int<space>b`
([^,]+)  # capture all characters till comma
         # this matches the actual argument name
         # and also matches any spaces after it
,?       # zero or one occurrence of a comma
         # this ensures that the argument name is immediately followed by a comma
         # this also handles the case for the last argument which doesn't have any comma after it

更多详细信息：https://regex101.com/r/9ju60l/1

希望有帮助

Java-使用单词和符号进行拆分

1 个答案: