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

问题描述

我无法找到一种方法来阻止我在 psring 启动应用程序中使用的 PDFBox 发出警告。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，并在 SO 中搜索了类似问题的答案，但没有得到任何结果。

标签： javaspring-bootloggingpdfbox

解决方案

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。

文件名是 logback-spring.xml

洪水记录器是从如何在 java 中更改 3rd 方库的日志级别复制而来的

<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"/>

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