必须为元素类型 "mapper" 声明属性 "namespace" 或The content of element type "mapper" must match "EMPTY"
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
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<mapper namespace = "com.introduce.Modle.User2">
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<resultMap type="com.introduce.Model.User2" id="user2ResultMap">
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<result property="name" column="name" />
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<result property="age" column="age" />
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<result property="sex" column="sex" />
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</resultMap>
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<select id="getUser2" resultMap="user2ResultMap">
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<![CDATA[select * from User2 where name=#{name}]]>
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</select>
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</mapper>
只需把<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
这行中的两处config 改成mapper即可