修改 .idea文件夹下 workspace.xml
<component name="PropertiesComponent">
<property name="RunOnceActivity.OpenProjectViewOnStart" value="true"/>
<property name="RunOnceActivity.ShowReadmeOnStart" value="true"/>
添加下面一行内容
<property name="dynamic.classpath" value="true"/>
<property name="last_opened_file_path" value="$PROJECT_DIR$"/>
</component>