删除 ASCII 颜色代码 [英] Remove ASCII color codes

问题描述

所以，我遇到了一个问题.我正在从 Logger 中捕获一些内容，输出如下所示:

So, I'm having an issue. I'm catching some stuff from a Logger, And the output looks something like this:

11:41:19 [INFO] ←[35;1m[Server] hi←[m

我需要知道如何删除那些讨厌的 ASCII 颜色代码(或解析它们).

I need to know how to remove those pesky ASCII color codes (or to parse them).

推荐答案

如果它们完好无损，它们应该由 ESC (U+001B) plus [ plus 组成以分号分隔的数字列表，加上 m.(请参阅 https://stackoverflow.com/a/9943250/978917.)在这种情况下，您可以通过写作:

If they're intact, they should consist of ESC (U+001B) plus [ plus a semicolon-separated list of numbers, plus m. (See https://stackoverflow.com/a/9943250/978917.) In that case, you can remove them by writing:

final String msgWithoutColorCodes =
    msgWithColorCodes.replaceAll("u001B\[[;\d]*m", "");

...或者您可以在检查日志时使用 less -r 来利用它们.:-)

. . . or you can take advantage of them by using less -r when examining your logs. :-)

(注意:这是特定于颜色代码的.如果您还发现其他 ANSI 转义序列，您需要对其进行概括.我认为一个相当通用的正则表达式应该是 u001B\[[;;\d]*[ -/]*[@-~].你可以找到 http://en.wikipedia.org/wiki/ANSI_escape_code 很有帮助.)

(Note: this is specific to color codes. If you also find other ANSI escape sequences, you'll want to generalize that a bit. I think a fairly general regex would be u001B\[[;\d]*[ -/]*[@-~]. You may find http://en.wikipedia.org/wiki/ANSI_escape_code to be helpful.)

如果序列不完整—也就是说，如果它们以某种方式被破坏了—那么你就必须调查并弄清楚到底发生了什么损坏.

If the sequences are not intact — that is, if they've been mangled in some way — then you'll have to investigate and figure out exactly what mangling has happened.

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