蚂蚁从属性文件替换令牌 [英] Ant replace token from properties file

问题描述

我想用Ant来代替在源文件中的标记：

i would like to replace tokens in source files with Ant:

some test ${foo} other text ...

令牌都包含在一个属性文件如：

Tokens are contained in a properties file eg.:

foo=1

其实这是容易的，如果在源文件中的令牌就像'@@富@@'或'富'，但我不能代替整个令牌：$ {}富

Actually this is easy if tokens in source files were like '@@foo@@' or 'foo' but i'm not able to replace whole token : ${foo}

我已经成功年前，但这个时候，我已经失败了...

I've succeed years ago but this time i've failed ...

感谢

推荐答案

这是有点类似<一个href=\"http://stackoverflow.com/questions/1232532/simulating-the-maven2-filter-mechanism-using-ant\">these.

属性从文件的properties.txt 加载。
这里的弱点是，在您输入文本的 $ {所有出现被转换为 {的前令牌替换 - 如果该字符串出现在文本其他地方这很可能打破东西。如果这是一个问题，它仍然奥特可以适应该溶液中。

Properties are loaded from the file properties.txt. The weakness here is that all occurrences of ${ in your input text are converted to { before the token substitution - which may well break things if that string appears elsewhere in the text. If that is a problem, it still aught to be possible to adapt this solution.

<copy file="input.txt" tofile="output.txt">
    <filterchain>
    <replaceregex pattern="\$\{" replace="{" />
    <filterreader classname="org.apache.tools.ant.filters.ReplaceTokens">
            <param type="propertiesfile" value="properties.txt"/>
            <param type="tokenchar" name="begintoken" value="{"/>
            <param type="tokenchar" name="endtoken" value="}"/>
    </filterreader>
    </filterchain>
</copy>

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