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首先你要了解xml 能用那些标签元素一般在头部信息中声明<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">http://mybatis.org/dtd/mybatis-3-mapper.dtd 摘要例子<!ELEMENT insert (#PCDATA | selectKey | include | trim | wh