你的模式没有捕获组，因此 \1 是一个空字符串.改用 $0 来引用整个匹配项:

Your pattern has no capturing group, hence \1 is an empty string. Use $0 instead to refer to the whole match:

查找内容:[^:{})]$
替换为:$0;

然而，在某些边缘情况下它可能会失败([^:{})]$ 模式匹配除 :、{ 之外的任何字符code>、} 和 )，因此在行结束前至少需要 1 个字符)，也许，您***在此处使用负向后视:

However, it might fail in some edge cases (the [^:{})]$ pattern matches any char other than :, {, } and ), so requires at least 1 char before a line end), perhaps, you should better use a negative lookbehind here:

查找内容:$(?<![:{})])
替换为:;

$(?<![:{})]) 模式匹配行尾(使用 $)，然后是 (?<![:{})]) 负向后视确保没有 :、{、} 或 >) 紧接在当前位置的左侧.

The $(?<![:{})]) pattern matches the end of line (with $) and then the (?<![:{})]) negative lookbehind makes sure that there is no :, {, } or ) immediately to the left of the current location.