选择“File” —> “Settings” —> “Editor” --> “File and Code Templates” -->"点击+"新建一个文件 —>见下图：
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace=" "> </mapper>