<?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.zt.life.sys.dao.SysUserRegDao"> 
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    <select id="existUsername" resultType="java.lang.Integer"> 
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        select count(1) 
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        from sys_user a 
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        <where> 
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            is_delete = 0 
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            <if test="whereSql!=null"> 
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               and user_name = #{username} 
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            </if> 
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        </where> 
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    </select> 
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    <update id="test"> 
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        update sys_user set real_name = #{realName} where username = #{userName} 
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    </update> 
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</mapper> 
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