Java 正则表达式 : need one regex to match all the formats specified

Question

日志文件中这些模式在一行中多次出现。例如该文件可能看起来像

dsads utc-hour_of_year:2013-07-30T17 jdshkdsjhf utc-week_of_year:2013-W31 dskjdskf
utc-week_of_year:2013-W31 dskdsld  fdsfd
dshdskhkds utc-month_of_year:2013-07 gfdkjlkdf

我想用“Y”替换所有日期特定信息

我尝试过:ReplaceAll("_year:.*\s", "_year:Y ");` 但由于 .* 的贪婪匹配，它会删除第一次替换后发生的所有内容

dsads utc-hour_of_year:Y
utc-week_of_year:Y
dshdskhkds utc-month_of_year:Y

但预期的结果是:

dsads utc-hour_of_year:Y jdshkdsjhf utc-week_of_year:Y dskjdskf
utc-week_of_year:Y dskdsld  fdsfd
dshdskhkds utc-month_of_year:Y gfdkjlkdf

Answer 1

尝试使用不情愿的量词:_year:.*?\s。

.replaceAll("_year:.*?\\s", "_year:Y ")

<小时/>

System.out
        .println("utc-hour_of_year:2013-07-30T17 dsfsdgfsgf utc-week_of_year:2013-W31 dsfsdgfsdgf"
                .replaceAll("_year:.*?\\s", "_year:Y "));

utc-hour_of_year:Y dsfsdgfsgf utc-week_of_year:Y dsfsdgfsdgf