log4j filter some text and don't log it

Use org.apache.log4j.varia.StringMatchFilter to filter the text not to display.  Here is the example for log4j.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
  <appender name="console" class="org.apache.log4j.ConsoleAppender">
    <layout class="org.apache.log4j.PatternLayout">
      <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p - %m%n" />
    </layout>

    <filter class="org.apache.log4j.varia.StringMatchFilter">
      <param name="StringToMatch" value="the-text-not-to-log" />
      <param name="AcceptOnMatch" value="false" />
    </filter>

    <!-- <filter class="org.apache.log4j.varia.DenyAllFilter" /> -->
  </appender>

  <root>
    <priority value="info" />
    <appender-ref ref="console" />
  </root>
</log4j:configuration>

Then run the following to test:

        LOG.info("This is an info and shouldn't be logged with the-text-not-to-log and blah blah");
        LOG.info("This is logged");
        LOG.debug("This is a debug and not logged");
        LOG.error("This is an error and logged");

If you only want to log some text, then change the value for AcceptOnMatch to true and add DenyAllFilter.