使用 Springboot org.apache.commons.logging

Question

我找不到一种方法来阻止我在 psring 启动应用程序中使用的 PDFBox 发出的警告。例如：2019-10-01 16:53:51.021  WARN 24564 --- [nio-8443-exec-2] o.a.pdfbox.pdmodel.font.PDType0Font      : No Unicode mapping for CID+4 (4) in font Calibri-Bold2019-10-01 16:53:51.022  WARN 24564 --- [nio-8443-exec-2] o.a.pdfbox.pdmodel.font.PDCIDFontType2   : Failed to find a character mapping for 4 in Calibri-Bold2019-10-01 16:53:51.022  WARN 24564 --- [nio-8443-exec-2] o.a.pdfbox.pdmodel.font.PDCIDFontType2   : Failed to find a character mapping for 4 in Calibri-Bold我尝试过：在应用程序文件中：static {  System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.NoOpLog");  java.util.logging.Logger.getLogger("org.apache.pdfbox").setLevel(java.util.logging.Level.OFF);  String[] loggers = {    "org.apache.pdfbox.util.PDFStreamEngine",    "org.apache.pdfbox.pdmodel.font.PDSimpleFont",    "org.apache.pdfbox.pdmodel.font.PDFont",    "org.apache.pdfbox.pdmodel.font.FontManager",    "org.apache.pdfbox.pdfparser.PDFObjectStreamParser",    "o.a.pdfbox.pdmodel.font.PDCIDFontType2",    "org.apache.pdfbox.pdmodel.font.PDCIDFontType2",    "o.a.pdfbox.pdmodel.font.PDType0Font",    "org.apache.pdfbox.pdmodel.font.PDType0Font",    "org.apache.pdfbox.pdmodel.font.PDType1Font"  };  for (String logger: loggers) {    org.apache.log4j.Logger logpdfengine = org.apache.log4j.Logger      .getLogger(logger);    logpdfengine.setLevel(org.apache.log4j.Level.OFF);  }}作为运行jar时的参数：-Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.NoOpLog-Dorg.slf4j.simpleLogger.defaultLogLevel=off在 PDFBox 代码中，使用以下命令设置日志：(import org.apache.commons.logging.LogFactory;)private static final Log LOG = LogFactory.getLog(PDCIDFontType0.class);LOG.warn("Found PFB but expected embedded CFF font " + fd.getFontName());我花了很长时间尝试了很多事情，并浏览了 SO 中类似问题的答案，但一无所获。

Answer 1

这是我最终使用的配置文件。我没有包含任何与日志记录相关的依赖项，也没有添加任何排除到 pdfbox 依赖项，只是将此文件添加到包含 application.properties 文件的文件夹中。

文件名是 logback-spring.xml

洪水记录器是从如何更改java中第3方库的日志级别复制的

<property name="LOGS" value="./logs" />

<appender name="Console"

    class="ch.qos.logback.core.ConsoleAppender">

    <layout class="ch.qos.logback.classic.PatternLayout">

        <Pattern>

            %black(%d{ISO8601}) %highlight(%-5level) [%blue(%t)] %yellow(%C{1.}): %msg%n%throwable

        </Pattern>

    </layout>

</appender>

<appender name="RollingFile"

    class="ch.qos.logback.core.rolling.RollingFileAppender">

    <file>${LOGS}/spring-boot-logger.log</file>

    <encoder

        class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">

        <Pattern>%d %p %C{1.} [%t] %m%n</Pattern>

    </encoder>

    <rollingPolicy

        class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">

        <!-- rollover daily and when the file reaches 10 MegaBytes -->

        <fileNamePattern>${LOGS}/archived/spring-boot-logger-%d{yyyy-MM-dd}.%i.log

        </fileNamePattern>

        <timeBasedFileNamingAndTriggeringPolicy

            class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">

            <maxFileSize>10MB</maxFileSize>

        </timeBasedFileNamingAndTriggeringPolicy>

    </rollingPolicy>

</appender>

<!-- LOG everything at INFO level -->

<root level="info">

    <appender-ref ref="RollingFile" />

    <appender-ref ref="Console" />

</root>

<!-- LOG "com.baeldung*" at TRACE level -->

<logger name="org.apache" level="ERROR" additivity="false">

    <appender-ref ref="RollingFile" />

    <appender-ref ref="Console" />

</logger>

<logger name="flooding logger" level="ERROR" additivity="false">

  <appender-ref ref="Console"/>

Answer 2

这是我在“旧”log4j 文件中使用的内容log4j.properties（您应该迁移到 log4j2）：

log4j.logger.org.springframework=WARN

log4j.logger.org.apache.pdfbox.pdmodel.font.PDCIDFontType2=FATAL

在“新”中log4j2.xml我有这个（附加器被命名为STDOUT和A1）：

<?xml version="1.0" encoding="UTF-8"?>

<!-- https://logging.apache.org/log4j/2.x/manual/configuration.html 

     https://logging.apache.org/log4j/2.x/manual/appenders.html

-->

<Configuration>

    <Appenders>

        ....

        ....

    </Appenders>

    <Loggers>

        <Logger name="org.springframework" level="warn" additivity="false">

            <AppenderRef ref="STDOUT"/>

            <AppenderRef ref="A1"/>

        </Logger>

        <Logger name="org.apache.pdfbox.pdmodel.font.PDCIDFontType2" level="fatal" additivity="false">

            <AppenderRef ref="STDOUT"/>

            <AppenderRef ref="A1"/>

        </Logger>

        <Root level="info">

            <AppenderRef ref="STDOUT"/>

            <AppenderRef ref="A1"/>

        </Root>

    </Loggers>

</Configuration>