IntelliJIdea 默认缓存保存在C盘中，随着打开项目的增加，缓存文件会越来越大

缓存配置文件路径：IntelliJ IDEA 14.0.1\bin\idea.properties

# Use ${idea.home} macro to specify location relative to IDE installation home.
# Use ${xxx} where xxx is any Java property (including defined in previous lines of this file) to refer to its value.
# Note for Windows users: please make sure you're using forward slashes (e.g. c:/idea/system).
#设置根目录
idea.home = D:/opt/tmp/.IntelliJIdea14
#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE config folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
#打开confi的配置
idea.config.path=${user.home}/config#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE system folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
#打开system的配置
idea.system.path=${user.home}/system#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to user installed plugins folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
#打开plugins的配置
idea.plugins.path=${idea.config.path}/plugins#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE logs folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
#打开log的配置
idea.log.path=${idea.system.path}/log