删除java中字符串中的特殊字符？ [英] Remove special characters in the string in java?

问题描述

如何删除字符串中除 - _之外的特殊字符。
现在我使用：

How to remove special characters in the string except "- _". Now I use:

replaceAll("[^\\w\\s]", "")

删除所有特殊字符，但我想保留 - _。谁能告诉我该怎么做？

it remove all special character but i want to keep "- _" . Can anyone tell me how should I do?

推荐答案

使用 replaceAll（[^ \\ w \\\\-_]，）;

我所做的是添加下划线和连字符到正则表达式。我在连字符之前添加了一个 \\ ，因为它还用于指定范围： az 表示一个字母之间的所有字母和z。使用 \\ 转义它可确保将其视为连字符。

What I did was add the underscore and hyphen to the regular expression. I added a \\ before the hyphen because it also serves for specifying ranges: a-z means all letters between a and z. Escaping it with \\ makes sure it is treated as an hyphen.

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