It's likely that neither a Result Type nor a Result Map was specified.

很可能既没有指定结果类型，也没有指定结果映射。

在编写mybatis的xml文件时 如编写查询语句
一定要加resultType 或resultMap 。如下：

加parameterType

<select id="getName" resultType="com.wys.pojo.NameBean" parameterType="com.wys.pojo.NameBeanVo">
        select now_time as nowTime, name_type as nameType from test_1
         <where>
          <if test="nameType!=null and nameType!=''">
            name_type=#{nameType}
        </if>
         <if test="name !=null and name !=''">
            and name =#{name}
        </if>
         </where> 
    </select>

加resultMap

<resultMap id="result" type="com.wys.pojo.NameBean">
   <result column="now_time" property="nowTime"/>
   <result column="name_type" property="nameType"/>
</resultMap>

<select id="getName" resultMap="result" parameterType="com.wys.pojo.NameBeanVo">
        select *   from test_1
         <where>
          <if test="nameType!=null and nameType!=''">
            name_type=#{nameType}
        </if>
         <if test="name !=null and name !=''">
            and name =#{name}
        </if>
         </where> 
    </select>

如果没有加,可能会出现 It’s likely that neither a Result Type nor a Result Map was specified.错误