logback on a mac returns question marks instead of

问题:

I'm just start using logback for logging my Java project running on glassfish3 AS, and I'm noticing some strange thing. This string of code

LOG.error("Вычисление {} уже произведено.", calc);

generates normal expected output if I'm running my application on windows. But if I'm the same configuration on Mac, I'm having question marks instead of words, like so:

15:37:29.083 ERROR r.g.g.c.TotalNachController - ?????????? [id=8871] ??? ???????????.

my logback configuration is:

<appender name="FILE" class="ch.qos.logback.core.FileAppender">
    <file>../logs/logback.log</file>
    <encoder>
        <pattern>%d{HH:mm:ss.SSS} %-5level %logger{35} - %msg%n</pattern>
    </encoder>
</appender>

Could someone please tell me, what I'm doing wrong?

回答1:

Try to define charset for encoder:

<appender name="FILE" class="ch.qos.logback.core.FileAppender">
    <file>../logs/logback.log</file>
    <encoder>
        <charset>utf-8</charset>
        <pattern>%d{HH:mm:ss.SSS} %-5level %logger{35} - %msg%n</pattern>
    </encoder>
</appender>

Sadly it's not described in documentation, but you can always lookup properties in source code. Specyfing <encoder> instantize PatternLayoutEncoder. Going up to its parent LayoutWrappingEncoder you can find method setCharset(). When specified it is used, as you can see in http://logback.qos.ch/xref/ch/qos/logback/core/encoder/LayoutWrappingEncoder.html#120

回答2:

You need to check if the used text editor is supporting your character set. Also the used terminal may affect the displayed characters also.

I suggest using more or less UNIX commands from Terminal application, that should support your charset, to validate if the characters are printed ok.