用斜杠替换斜线之间的点，即'/./''/'

Question

For this string dirPath , 对于这个字符串dirPath ，

String dirPath = "c:/create/a/dir/very/deep/inside/../././../../../dir/";

I want the output string to look like : 我希望输出字符串看起来像：

"c:/create/a/dir/very/deep/inside/../../../../dir/";

I used : 我用了：

dirPath.replaceAll("/[.]/", "/");

but that gave : 但那给了：

c:/create/a/dir/very/deep/inside/.././../../../dir/
                                   ^^^

then, tried with one more replaceAll as: 然后， replaceAll一次替换所有：

dirPath.replaceAll("/[.]/", "/").replaceAll("/[.]/", "/");

and that worked! 那工作！

My question is why couldn't one call achieve the same result? 我的问题是为什么一个电话无法达到相同的结果？ How to achieve it in simplest way? 如何以最简单的方式实现它？

PS Another regex that didn't work for me : .replaceAll("($|/)[.]/", "$1") PS另一个对我不起作用的正则表达式： .replaceAll("($|/)[.]/", "$1")

Answer 1

You can use a lookahead pattern to avoid consuming the slash needed by the subsequent match: 您可以使用超前模式来避免消耗后续匹配所需的斜杠：

dirPath.replaceAll("/\\.(?=/)", "")