本文使用 Idea2024

Idea 会将一些配置默认缓存在C盘，使用久了会占用大量空间（本人的Idea占用了将近5个G，以至于不得不进行迁移）

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缓存目录主要涉及以下四个目录，四个目录可以分为两组，每组目录必须一起调整

配置名	默认路径
idea.config.path	C:\Users\JohnS\AppData\Roaming\JetBrains\IntelliJIdea2024.1
idea.system.path	C:\Users\JohnS\AppData\Local\JetBrains\IntelliJIdea2024.1
idea.plugins.path	C:\Users\JohnS\AppData\Roaming\JetBrains\IntelliJIdea2024.1\plugins
idea.log.path	C:\Users\JohnS\AppData\Local\JetBrains\IntelliJIdea2024.1\log

打开 ${idea.home.path}/bin/idea.properties 配置文件，修改相关参数的路径

#---------------------------------------------------------------------
# Uncomment this option if you want to customize a path to the settings directory.
#---------------------------------------------------------------------
idea.config.path=D:/idea2024/config#---------------------------------------------------------------------
# Uncomment this option if you want to customize a path to the caches directory.
#---------------------------------------------------------------------
idea.system.path=D:/idea2024/system#---------------------------------------------------------------------
# Uncomment this option if you want to customize a path to the user-installed plugins directory.
#---------------------------------------------------------------------
idea.plugins.path=${idea.config.path}/plugins#---------------------------------------------------------------------
# Uncomment this option if you want to customize a path to the logs directory.
#---------------------------------------------------------------------
idea.log.path=${idea.system.path}/log

将默认路径中的文件复制至新路径，然后重启 Idea，原来的配置不会丢失。

然后就可以删除默认路径中的文件啦，释放大量空间。

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不同的版本可以参考官网文档：
https://www.jetbrains.com/help/idea/2024.1/directories-used-by-the-ide-to-store-settings-caches-plugins-and-logs.html#config-directory