java - 在 Java 或 ANT 下以正则表达式输出换行符

Question

我有一个调用 replaceregexp 任务的 ant 目标

<target name="regexp.replace">
    <replaceregexp file="${file.temp}"
                   match="(.*)"
                   replace="first operation on \1  second operation on \1"
                   byline="true"/>
</target>

file.temp 是

A1
A2

期望的输出是

first operation on A1
second operation on A1
first operation on A2
second operation on A2

在 ant replaceregexp 参数中插入什么作为新行字符以产生所需的输出？

 replace="first operation on \1 %NEW_LINE% second operation on \1"

Answer 1

以下对我有用:

<replaceregexp file="test.txt"
               match="(.*)"
               replace="first operation on \1${line.separator}second operation on \1"
               byline="true"/>