使用 Springboot 禁用 PDFBox 日志记录 org.apache.commons.logging

Question

我找不到一种方法来阻止我在 psring 引导应用程序中使用的 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-Bold

2019-10-01 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

2019-10-01 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

我试过：在申请文件中：

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);
  }

}

作为参数当运行 jar:

-Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.NoOpLog
-Dorg.slf4j.simpleLogger.defaultLogLevel=off

在 PDFBox 代码中，日志设置使用：

(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，并在 SO 中浏览了类似问题的答案，但一无所获。

Answer 1

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

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

在 "new" log4j2.xml 我有这个（appenders 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>

Answer 2

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或向 pdfbox 依赖项添加任何排除项，只是将此文件添加到包含 application.properties 文件的文件夹中。

文件名为 logback-spring.xml

洪水记录器复制自

<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 3

我认为这也适用于 log4j2。 我使用这种简单的方法在 SpringBoot 应用程序中禁用来自特定库的日志。您只需将其添加到 log4j2.xml 文件中即可。

<Loggers>  
    <Root>
        ****** here is some AppenderRef *******
    </Root>      
    <Logger name="o.a.pdfbox" level="off"/>
    or 
    <Logger name="org.apache.pdfbox" level="off"/> 

</Loggers>

使用 Springboot 禁用 PDFBox 日志记录 org.apache.commons.logging

Disable PDFBox logging with Springboot org.apache.commons.logging

java

logging

pdfbox

spring-boot