如何从Java中的®，©，™等字符串中删除高位ASCII字符 [英] How to remove high-ASCII characters from string like ®, ©, ™ in Java

问题描述

我想从Java中的String中检测并删除高级ASCII字符，如®，©，™。是否有任何开源库可以做到这一点？

I want to detect and remove high-ASCII characters like ®, ©, ™ from a String in Java. Is there any open-source library that can do this?

推荐答案

如果你需要删除所有非US-ASCII（即在0x0-0x7F之外的字符，您可以这样做：

If you need to remove all non-US-ASCII (i.e. outside 0x0-0x7F) characters, you can do something like this:

s = s.replaceAll("[^\\x00-\\x7f]", "");

如果你需要过滤很多字符串，最好使用预编译模式：

If you need to filter many strings, it would be better to use a precompiled pattern:

private static final Pattern nonASCII = Pattern.compile("[^\\x00-\\x7f]");
...
s = nonASCII.matcher(s).replaceAll();

如果它真的对性能至关重要，也许Alex Nikolaenkov的建议会更好。

And if it's really performance-critical, perhaps Alex Nikolaenkov's suggestion would be better.

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