How to solve the problem of printing spaces in IDEA console logs?

IntelliJ IDEA Console Log Space Problem Solution

During IntelliJ IDEA development, the appearance of extra spaces in the console log will affect readability. This article provides solutions, mainly targeting the use of Logback log framework.

The root cause of the problem is usually in the log format configuration of Logback. By modifying the logback.xml file, you can adjust the log output format and eliminate unnecessary spaces.

Here is an improved Logback configuration example that effectively avoids extra spaces:

<configuration>
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{YYYY-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>
    <root level="TRACE">
        <appender-ref ref="STDOUT"></appender-ref>
    </root>
    <logger name="Application" level="INFO"></logger>
</configuration>

In this configuration, %n represents a newline character, ensuring that each log information is individually lined and avoiding space interference. %-5level controls the log level within 5 characters to avoid unnecessary spaces caused by level names. Other formatting elements have also been streamlined to make the output simpler.

After modifying the configuration, restart the application and you will see a clearer and cleaner console log output. Please note that if you use other log frameworks (such as Log4j), you need to adjust the log format according to the configuration files of the corresponding framework.

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