在两个字符串之间替换字符串 [英] Replace a String between two Strings

问题描述

假设我们有类似的内容：

Let's say we have something like:

&firstString=someText&endString=OtherText

我想用其他东西替换someText。考虑到我不知道someText可能是什么（任何字符串）这一事实，最好的方法是什么，我所知道的是它将被& firstString =和& endString =

And I would like to replace "someText" with something else. What is the best way to do this considering the fact that I do not know what someText might be (any string) and all I know is that it will be surrounded with &firstString= and &endString=

编辑：抱歉看起来这还不够清楚。我不知道someText可能是什么，我唯一的信息是它介于& firstString =和& endString =

sorry looks like this is not clear enough. I do not know what "someText" might be, the only information I have is that it will be between &firstString= and &endString=

我在考虑多次使用拆分，但听起来很丑..

I was thinking about using split multiple times but it sounded ugly ..

推荐答案

你可以使用 String＃replaceAll that像这样支持正则表达式：

You can use String#replaceAll that has support for regex like this:

String newstr = str.replaceAll("(&firstString=)[^&]*(&endString=)", "$1foo$2");

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