<?xml version="1.0" encoding="UTF-8"?> 
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 
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<mapper namespace="com.xzx.gc.pay.mapper.UserMapper"> 
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    <select id="queryUserById" resultType="com.xzx.gc.model.admin.UserModel"> 
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        select * from xzx_user_info where del_flag = 0 
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        <if test="userId != null and userId != ''"> 
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            and user_id=#{userId} 
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        </if> 
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    </select> 
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</mapper> 
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