<select id="getCount" resultType="int" parameterType="VmBigDataScreen">
    select count(1) from vm_big_data_screen
    <where>
      <if test="screenname != null and screenname != ''">
        and screenName like CONCAT('%',#{screenname},'%')
      </if>
      <if test="status != null and status != '' ">
        and status = #{status,jdbcType=INTEGER}
      </if>
    
    </where>
  </select>

<if test="status != null ">
    and status = #{status,jdbcType=INTEGER}
</if>
 当参数是Integer类型的时候，默认为空字符串。status != ' '
 所以不要status != ' '写这个条件