1. 系统盘清理说明

win7 80G的系统盘，随着使用时间的增加，空间越来越小，只剩不到2G，随计划清理系统盘数据
1. maven 下载的jar移动到其它盘，这个比较简单，这里不做说明
   修改maven settings.xml文件目录根据需要修改，<localRepository>D:/m2_repo/repository</localRepository>
2. idea 2019.3，C:\Users\用户名\.IntelliJIdea2019.3目录占3.4G，移到其他盘符后发现注册失效

2. idea 注册失效解决

关闭所有idea应用

2.1 修改idea安装目录配置文件

修改安装目录idea 安装目录配置文件，bin/idea.properties，目的目录根据需要修改

# idea.config.path=${user.home}/.IntelliJIdea/config
idea.config.path=D:/idea_config/.IntelliJIdea2019.3/config

#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE system folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
# idea.system.path=${user.home}/.IntelliJIdea/system
idea.system.path=D:/idea_config/.IntelliJIdea2019.3/system

#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to user installed plugins folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
# idea.plugins.path=${idea.config.path}/plugins
idea.plugins.path=D:/idea_config/.IntelliJIdea2019.3/plugins

#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE logs folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
# idea.log.path=${idea.system.path}/log
idea.log.path=D:/idea_config/.IntelliJIdea2019.3/log

2.2 删除系统盘多余的文件

这个目录和文件保留，其它文件和目录全部删除
C:\Users\用户名\.IntelliJIdea2019.3\config\idea64.exe.vmoptions

2.3 打开 idea 测试

打开idea，发现一切正常，配置文件都在，注册也没有失效。