mybatis获取数据库内容报错：Cause: java.sql.SQLException: No value specified for parameter 1

Question

以下是dao/UserMapper.xml中代码：

<?xml version="1.0" encoding="gbk" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="dao.Mapper">
    <select id="getUserList" resultType="pojo.User">
        //执行sql
        select * from mybatis.user
    </select>
</mapper>