如何从日志消息log4j中删除或替换换行符 [英] How to remove or replace newline from log messages log4j

问题描述

我正在使用下面的转换模式

I am using below conversion pattern

log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS Z}  [%t] %-5p %c- %m%n

但是我想删除换行符.

我尝试使用％replace(％ex){'[\ r \ n] +'，'\\ n'}％nopex％n

但是它不起作用％replace不起作用.它只会读取％r ，然后替换

but it's not working %replace is not working. it only reading %r and then eplace

推荐答案

似乎您没有使用％replace 的正确语法-请参见

It seems you were not using the right syntax of the %replace - see Log4j Layouts for the right one.

使用正确的语法，您可以使用以下表达式删除所有换行符:

Using the right syntax, you could remove all the newlines using the following expression:

%replace{%msg}{[\r\n]+}{}

但是，在某些情况下，完全删除换行符可能会使日志难以阅读.我建议，不要删除，而是用一些东西替换换行符，例如带有这样的箭头字符:↵(我为与 Enter键)上的符号相似.

However, removing newlines altogether can make the log hard to read in certain cases. I would suggest that, instead of removing, you replace the newlines with something, e.g. with such an arrow character: ↵ (I chose it for its similarity with the symbol on the Enter key).

所以我建议使用这种模式:

So I would suggest using such a pattern:

%replace{%msg}{\r?\n}{↵}

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