Regex 在这种情况下使用什么正则表达式

正确代码：

"key1=val1;key2=val2;key3=val3"    -- Correct as each pair is having ";" at the end except the last pair

"key1=val1;key2=val2; key3=val3;"    -- Invalid as last pair is having ";" at the end
"key1=val1;;;key2=val2;;;key3=val3"   -- Invalid as there are multiple ";" in the middle

错误代码：

"key1=val1;key2=val2;key3=val3"    -- Correct as each pair is having ";" at the end except the last pair

"key1=val1;key2=val2; key3=val3;"    -- Invalid as last pair is having ";" at the end
"key1=val1;;;key2=val2;;;key3=val3"   -- Invalid as there are multiple ";" in the middle

我从stackoverflow中的一些旧链接获得下面的正则表达式，但在上述情况下它不起作用：

^(?:\s*\w+\s*=\s*[^;]*;)+$

你可以用

^\w+\s*=\s*\w+(?:;\s*\w+\s*=\s*\w+)*$

解释

                         EXPLANATION
--------------------------------------------------------------------------------
  ^                        the beginning of the string
--------------------------------------------------------------------------------
  (?:                      group, but do not capture (1 or more times
                           (matching the most amount possible)):
--------------------------------------------------------------------------------
    \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                             or more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                             more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                             or more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    =                        '='
--------------------------------------------------------------------------------
    \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                             or more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                             more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    (?:                      group, but do not capture:
--------------------------------------------------------------------------------
      ;                        ';'
--------------------------------------------------------------------------------
      (?!                      look ahead to see if there is not:
--------------------------------------------------------------------------------
        \s*                      whitespace (\n, \r, \t, \f, and " ")
                                 (0 or more times (matching the most
                                 amount possible))
--------------------------------------------------------------------------------
        $                        before an optional \n, and the end
                                 of the string
--------------------------------------------------------------------------------
      )                        end of look-ahead
--------------------------------------------------------------------------------
     |                        OR
--------------------------------------------------------------------------------
      \s*                      whitespace (\n, \r, \t, \f, and " ")
                               (0 or more times (matching the most
                               amount possible))
--------------------------------------------------------------------------------
      $                        before an optional \n, and the end of
                               the string
--------------------------------------------------------------------------------
    )                        end of grouping
--------------------------------------------------------------------------------
  )+                       end of grouping
--------------------------------------------------------------------------------
  \s*                      whitespace (\n, \r, \t, \f, and " ") (0 or
                           more times (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  $                        before an optional \n, and the end of the
                           string

• ^

  字符串的开头

• \w+\s*=\s*\w+

  将1+字字符、

  =

  和1+字字符与可选空白字符匹配

• （？：

  非捕获组

  • ；\s*\w+\s*=\s*\w+

    匹配

    ；

    和上面提到的相同模式

• ）*

  关闭组并重复0多次

• $

  字符串结尾

用双倍的反斜杠

^\\w+\\s*=\\s*\\w+(?:;\\s*\\w+\\s*=\\s*\\w+)*$

你可以用

^\w+\s*=\s*\w+(?:;\s*\w+\s*=\s*\w+)*$

解释

                         EXPLANATION
--------------------------------------------------------------------------------
  ^                        the beginning of the string
--------------------------------------------------------------------------------
  (?:                      group, but do not capture (1 or more times
                           (matching the most amount possible)):
--------------------------------------------------------------------------------
    \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                             or more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                             more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                             or more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    =                        '='
--------------------------------------------------------------------------------
    \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                             or more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                             more times (matching the most amount
                             possible))
--------------------------------------------------------------------------------
    (?:                      group, but do not capture:
--------------------------------------------------------------------------------
      ;                        ';'
--------------------------------------------------------------------------------
      (?!                      look ahead to see if there is not:
--------------------------------------------------------------------------------
        \s*                      whitespace (\n, \r, \t, \f, and " ")
                                 (0 or more times (matching the most
                                 amount possible))
--------------------------------------------------------------------------------
        $                        before an optional \n, and the end
                                 of the string
--------------------------------------------------------------------------------
      )                        end of look-ahead
--------------------------------------------------------------------------------
     |                        OR
--------------------------------------------------------------------------------
      \s*                      whitespace (\n, \r, \t, \f, and " ")
                               (0 or more times (matching the most
                               amount possible))
--------------------------------------------------------------------------------
      $                        before an optional \n, and the end of
                               the string
--------------------------------------------------------------------------------
    )                        end of grouping
--------------------------------------------------------------------------------
  )+                       end of grouping
--------------------------------------------------------------------------------
  \s*                      whitespace (\n, \r, \t, \f, and " ") (0 or
                           more times (matching the most amount
                           possible))
--------------------------------------------------------------------------------
  $                        before an optional \n, and the end of the
                           string

• ^

  字符串的开头

• \w+\s*=\s*\w+

  将1+字字符、

  =

  和1+字字符与可选空白字符匹配

• （？：

  非捕获组

  • ；\s*\w+\s*=\s*\w+

    匹配

    ；

    和上面提到的相同模式

• ）*

  关闭组并重复0多次

• $

  字符串结尾

用双倍的反斜杠

^\\w+\\s*=\\s*\\w+(?:;\\s*\\w+\\s*=\\s*\\w+)*$

请尝试以下内容：

.*\w;\w.*\w;\w.*[^;]$

试验

说明：

• *-->匹配任何字符
• \w-->匹配任何单词字符
• [^；]$-->将排除以结尾的任何行

尝试以下操作：

.*\w;\w.*\w;\w.*[^;]$

试验

说明：

• *-->匹配任何字符
• \w-->匹配任何单词字符
• [^；]$-->将排除以结尾的任何行

  ---

  我发现这样的事情没有正则表达式就容易多了。对于使用JavaScript的eample：

  function isValid(string) {
    return string.split(/;/).map(e => e.split(/=/)).every(e => e.length === 2);
  }
  

  ---

  我发现这样的事情没有正则表达式就容易多了。对于使用JavaScript的eample：

  function isValid(string) {
    return string.split(/;/).map(e => e.split(/=/)).every(e => e.length === 2);
  }
  

  还有一个较短的：

  ^(?:\s*\w+\s*=\s*\w+(?:;(?!\s*$)|\s*$))+\s*$
  

  看
  解释

                           EXPLANATION
  --------------------------------------------------------------------------------
    ^                        the beginning of the string
  --------------------------------------------------------------------------------
    (?:                      group, but do not capture (1 or more times
                             (matching the most amount possible)):
  --------------------------------------------------------------------------------
      \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                               or more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                               more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                               or more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      =                        '='
  --------------------------------------------------------------------------------
      \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                               or more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                               more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      (?:                      group, but do not capture:
  --------------------------------------------------------------------------------
        ;                        ';'
  --------------------------------------------------------------------------------
        (?!                      look ahead to see if there is not:
  --------------------------------------------------------------------------------
          \s*                      whitespace (\n, \r, \t, \f, and " ")
                                   (0 or more times (matching the most
                                   amount possible))
  --------------------------------------------------------------------------------
          $                        before an optional \n, and the end
                                   of the string
  --------------------------------------------------------------------------------
        )                        end of look-ahead
  --------------------------------------------------------------------------------
       |                        OR
  --------------------------------------------------------------------------------
        \s*                      whitespace (\n, \r, \t, \f, and " ")
                                 (0 or more times (matching the most
                                 amount possible))
  --------------------------------------------------------------------------------
        $                        before an optional \n, and the end of
                                 the string
  --------------------------------------------------------------------------------
      )                        end of grouping
  --------------------------------------------------------------------------------
    )+                       end of grouping
  --------------------------------------------------------------------------------
    \s*                      whitespace (\n, \r, \t, \f, and " ") (0 or
                             more times (matching the most amount
                             possible))
  --------------------------------------------------------------------------------
    $                        before an optional \n, and the end of the
                             string
  

  还有一个较短的：

  ^(?:\s*\w+\s*=\s*\w+(?:;(?!\s*$)|\s*$))+\s*$
  

  看
  解释

                           EXPLANATION
  --------------------------------------------------------------------------------
    ^                        the beginning of the string
  --------------------------------------------------------------------------------
    (?:                      group, but do not capture (1 or more times
                             (matching the most amount possible)):
  --------------------------------------------------------------------------------
      \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                               or more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                               more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                               or more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      =                        '='
  --------------------------------------------------------------------------------
      \s*                      whitespace (\n, \r, \t, \f, and " ") (0
                               or more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      \w+                      word characters (a-z, A-Z, 0-9, _) (1 or
                               more times (matching the most amount
                               possible))
  --------------------------------------------------------------------------------
      (?:                      group, but do not capture:
  --------------------------------------------------------------------------------
        ;                        ';'
  --------------------------------------------------------------------------------
        (?!                      look ahead to see if there is not:
  --------------------------------------------------------------------------------
          \s*                      whitespace (\n, \r, \t, \f, and " ")
                                   (0 or more times (matching the most
                                   amount possible))
  --------------------------------------------------------------------------------
          $                        before an optional \n, and the end
                                   of the string
  --------------------------------------------------------------------------------
        )                        end of look-ahead
  --------------------------------------------------------------------------------
       |                        OR
  --------------------------------------------------------------------------------
        \s*                      whitespace (\n, \r, \t, \f, and " ")
                                 (0 or more times (matching the most
                                 amount possible))
  --------------------------------------------------------------------------------
        $                        before an optional \n, and the end of
                                 the string
  --------------------------------------------------------------------------------
      )                        end of grouping
  --------------------------------------------------------------------------------
    )+                       end of grouping
  --------------------------------------------------------------------------------
    \s*                      whitespace (\n, \r, \t, \f, and " ") (0 or
                             more times (matching the most amount
                             possible))
  --------------------------------------------------------------------------------
    $                        before an optional \n, and the end of the
                             string
  

  ---

  我有东西。任何人都可以验证（^（？：\\s*\\w+\\s*=\\s*[^；]*；）+）.[^；]$键或值是否包含

  =

  或

  =

  或

  如果是，它们是如何转义的？
  [\w]
  -->
  \w
  。另外，这里不需要点星汤。我用。*来选择行中的其余字符。如果没有这些，我怀疑它是否有效。另外，这里不需要点星汤。我用。*来选择行中的其余字符。如果没有这一点，我怀疑它是否有效。。这不适用于以下键1=val1；key2=val2 key3=val3不应拾取上面的内容，因为缺少一个；在键2之后=val2@user10278830它与那不匹配。。这不适用于以下键1=val1；key2=val2 key3=val3不应拾取上面的内容，因为缺少一个；在键2之后=val2@user10278830它和那个不匹配