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

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"?>


  
    
      
      
      
      
      
      
      
      
    
    
      
      
    
  
  
    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}
  

4. 解决方式
   把实体类的构造函数去掉