Regex sed正则表达式匹配首次出现
我有以下字符串：Regex sed正则表达式匹配首次出现,regex,bash,unix,sed,non-greedy,Regex,Bash,Unix,Sed,Non Greedy,我有以下字符串： <div class="downloadlist" id="Mactopia_Office2011"><p><a depEvents="DynamicDownloadsLinkClick[url|downloads?pid=Mactopia_Office2011&fid=78B06C3D-0158-4344-8A8B-5FB822CD44D8#viewer|prodID|Mactopia_Office2011]" id="78B06
<div class="downloadlist" id="Mactopia_Office2011"><p><a depEvents="DynamicDownloadsLinkClick[url|downloads?pid=Mactopia_Office2011&fid=78B06C3D-0158-4344-8A8B-5FB822CD44D8#viewer|prodID|Mactopia_Office2011]" id="78B06C3D-0158-4344-8A8B-5FB822CD44D8" class="download_link" href="
 ?pid=Mactopia_Office2011&fid=78B06C3D-0158-4344-8A8B-5FB822CD44D8#viewer
 ">Microsoft Office für Mac 2011 14.4.1-Update <span class="link_arrow">></span></a></p><p><a depEvents="DynamicDownloadsLinkClick[url|downloads?pid=Mactopia_Office2011&fid=F7B8C82F-71FF-4675-8924-DAB652BA6603#viewer|prodID|Mactopia_Office2011]" id="F7B8C82F-71FF-4675-8924-DAB652BA6603" class="download_link" href="
 ?pid=Mactopia_Office2011&fid=F7B8C82F-71FF-4675-8924-DAB652BA6603#viewer
 ">Microsoft Office für Mac 2011 14.3.9-Update <span class="link_arrow">></span></a></p><p><a depEvents="DynamicDownloadsLinkClick[url|downloads?pid=Mactopia_Office2011&fid=3BEDF6DC-1464-4D17-A5BB-C90F8FEF567C#viewer|prodID|Mactopia_Office2011]" id="3BEDF6DC-1464-4D17-A5BB-C90F8FEF567C" class="download_link" href="
 ?pid=Mactopia_Office2011&fid=3BEDF6DC-1464-4D17-A5BB-C90F8FEF567C#viewer
 ">Microsoft Office für Mac 2011 14.3.8-Update <span class="link_arrow">></span></a></p><p><a depEvents="DynamicDownloadsLinkClick[url|downloads?pid=Mactopia_Office2011&fid=3445FBDC-E092-4530-BF31-D60CECD53AB8#viewer|prodID|Mactopia_Office2011]" id="3445FBDC-E092-4530-BF31-D60CECD53AB8" class="download_link" href="
 ?pid=Mactopia_Office2011&fid=3445FBDC-E092-4530-BF31-D60CECD53AB8#viewer
 ">Microsoft Office für Mac 2011 14.3.7-Update <span class="link_arrow">></span></a></p><p><a depEvents="DynamicDownloadsLinkClick[url|downloads?pid=Mactopia_Office2011&fid=EF1E612F-D8E3-4628-9FE4-AD136F0DEBD3#viewer|prodID|Mactopia_Office2011]" id="EF1E612F-D8E3-4628-9FE4-AD136F0DEBD3" class="download_link" href="
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s/^.*Microsoft Office f.r Mac 2011\（[^]*\）-Update.$/\1/不幸的是，输出是14.3.7（所以是最后一次出现），考虑到对非贪婪匹配使用
*？sed 's/\(Microsoft Office f.r Mac 2011 \([^ ]*\)-Update\).*$/\1/; s/^.*>//' infile
Microsoft Office für Mac 2011 14.4.1-Update
您可以使用两个替换命令，第一个用于删除第一次出现后的所有字符，第二个用于删除所有前导字符：
sed 's/\(Microsoft Office f.r Mac 2011 \([^ ]*\)-Update\).*$/\1/; s/^.*>//' infile
Microsoft Office für Mac 2011 14.4.1-Update
如果您不太依赖于
sedperl -pne 's/.*?(Microsoft Office.*?Update).*/$1/' file
如果您不太依赖于
sedperl -pne 's/.*?(Microsoft Office.*?Update).*/$1/' file
Perl支持非贪婪正则表达式，因此您可以这样做：
perl -pe 's|.*?(Microsoft Office f.+?r Mac 2011 \S+-Update).*|$1|' string
Microsoft Office für Mac 2011 14.4.1-Update
我将
f.r+？\Sperl -pe 's|.*?(Microsoft Office f.+?r Mac 2011 \S+-Update).*|$1|' string
Microsoft Office für Mac 2011 14.4.1-Update
我将
f.r+？\Sawkawk -F " &" '{gsub(/<[^>]*>/,"");$1=$1;print $1;exit}' file
Microsoft Office für Mac 2011 14.4.1-Update
awk-F“&”{gsub（/]*>/，”）；$1=$1；打印$1；退出}文件
Microsoft Office für Mac 2011 14.4.1-Update
awkawk -F " &" '{gsub(/<[^>]*>/,"");$1=$1;print $1;exit}' file
Microsoft Office für Mac 2011 14.4.1-Update
awk-F“&”{gsub（/]*>/，”）；$1=$1；打印$1；退出}文件
Microsoft Office für Mac 2011 14.4.1-Update
Microsoft Office für Mac 2011 14.4.1-Updatesed -rn 's/^.*[ ]+\">([^<]*)<.*[ ]+\">([^<]*)<.*[ ]+\">([^<]*)<.*[ ]+\">([^<]*)<.*$/\1/p' file.txt
如果该行上只有四个字符串（
Microsoft Office für Mac 2011 14.4.1-Updatesed -rn 's/^.*[ ]+\">([^<]*)<.*[ ]+\">([^<]*)<.*[ ]+\">([^<]*)<.*[ ]+\">([^<]*)<.*$/\1/p' file.txt
有一种方法可以使用
sedsed