I have a simple java console application. pdfbox is utilized to extract text from PDF files. But there is continuous info printed in console:
十一月 29, 2017 9:28:27 下午 org.apache.pdfbox.pdmodel.font.PDSimpleFont toUnicode
警告: No Unicode mapping for 14 (145) in font GGNHDZ+SimSun
十一月 29, 2017 9:28:27 下午 org.apache.pdfbox.pdmodel.font.PDSimpleFont toUnicode
警告: No Unicode mapping for 28 (249) in font LNKLJH+SimSun
十一月 29, 2017 9:28:27 下午 org.apache.pdfbox.pdmodel.font.PDSimpleFont toUnicode
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<logger name="org.apache.pdfbox" level="ERROR"/>
<timestamp key="timestamp-by-second" datePattern="yyyyMMdd'T'HHmmss"/>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<!-- encoder 默认配置为PatternLayoutEncoder -->
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<appender name="FILE" class="ch.qos.logback.core.FileAppender">
<file>logs/test-${timestamp-by-second}.log</file>
<append>true</append>
<encoder>
<pattern>%-4relative [%thread] %-5level %logger{35} - %msg%n
</pattern>
</encoder>
</appender>
<root level="ERROR">
<appender-ref ref="FILE" />
<appender-ref ref="STDOUT" />
</root>
If the logging was being emitted by Logback then the approach you have tried, for example ...
<logger name="org.apache.pdfbox" level="ERROR"/>
STDOUT
appender... would work.
However, PDFBox doesn't use Logback, instead it uses Apache Commons Logging (http://commons.apache.org/logging/). There are several ways of disabling Commons Logging:
Disable Commons Logging entirely by adding the following to your Main class' static initialiser block, this *must** be executed before PDFBOX creates a Log
instance:
static {
System.setProperty("org.apache.commons.logging.Log",
"org.apache.commons.logging.impl.NoOpLog");
}
Disable Commons Logging by passing the following JVM parameter when you start your application:
-Dorg.apache.commons.logging.Log=org.apache.commons.logging.impl.NoOpLog`
Disable Commons Logging for the PDFBOX namespace by adding the following to your Main class' static initialiser block, this *must** be executed before PDFBOX creates a Log
instance (note: you could alternatively use Level.SEVERE
, depending on how much tolerance you have for PDFBOX's log output):
java.util.logging.Logger.getLogger("org.apache.pdfbox")
.setLevel(java.util.logging.Level.OFF);