IntelliJ IDEA默认的Output输出缓存区大小只有1024KB,超过大小限制的就会被清除,而且还会显示【too much output to process】,可通过如下配置界面进行修改Override console cycle buffer size(Settings→Editor→General→Console),单位为KB

如果需要禁用缓存区大小限制就需要修改配置文件idea.properties

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配置文件中原有设置:
#---------------------------------------------------------------------
# This option controls console cyclic buffer: keeps the console output size not higher than the specified buffer size (Kb).
# Older lines are deleted. In order to disable cycle buffer use idea.cycle.buffer.size=disabled
#---------------------------------------------------------------------
idea.cycle.buffer.size=1024

修改配置如下所示:

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idea.cycle.buffer.size=disabled

禁用后的界面如下所示: