22. Mybatis 和 实体类的一个错误：Cause: java.lang.IllegalArgumentException: argument type mismatch] with root cause

1. 错误展示：
   

2. 实体类：

public class DeviceTypeImg {
    private LDeviceType deviceType;
    private LImg icon;
    public DeviceTypeImg(LDeviceType deviceType, LImg icon) {
        this.deviceType = deviceType;
        this.icon = icon;
    }
    public LDeviceType getDeviceType() {
        return deviceType;
    }
    public void setDeviceType(LDeviceType deviceType) {
        this.deviceType = deviceType;
    }
    public LImg getIcon() {
        return icon;
    }
    public void setIcon(LImg icon) {
        this.icon = icon;
    }
}

3. MyBatis xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.tjl.health.admin.dao.LDeviceTypeMapperCustom">
  <resultMap id="BaseResultMap" type="com.tjl.health.admin.pojo.vo.DeviceTypeImg">
    <association property="deviceType" javaType="com.tjl.health.model.LDeviceType">
      <id column="id" jdbcType="VARCHAR" property="id" />
      <result column="name" jdbcType="VARCHAR" property="name" />
      <result column="icon_id" jdbcType="VARCHAR" property="iconId" />
      <result column="description" jdbcType="VARCHAR" property="description" />
      <result column="create_time" jdbcType="TIMESTAMP" property="createTime" />
      <result column="update_time" jdbcType="TIMESTAMP" property="updateTime" />
      <result column="delete_time" jdbcType="TIMESTAMP" property="deleteTime" />
      <result column="parent_id" jdbcType="VARCHAR" property="parentId" />
    </association>
    <association property="icon" javaType="com.tjl.health.model.LImg">
      <result column="imgId" jdbcType="VARCHAR" property="id" />
      <result column="imgUrl" jdbcType="VARCHAR" property="url" />
    </association>
  </resultMap>
  <select id="selectById" resultMap="BaseResultMap" >
    select
        ldt.id,
        ldt.`name`,
        ldt.icon_id,
        ldt.description,
        ldt.create_time,
        ldt.update_time,
        ldt.delete_time,
        ldt.parent_id,
        li.id imgId,
        li.url imgUrl
    from l_device_type ldt
    left join l_img li
    on ldt.icon_id=li.id
    where ldt.id=#{deviceTypeId}
  </select>
</mapper>

4. 解决方式
   把实体类的构造函数去掉