mybatis if标签判断不生效的解决方法

<if test="computationRule == '1'">
  FROM app_sz_bbb a
</if>
<if test="computationRule == '2'">
  FROM app_ccc a
</if>

<if test="computationRule == '1'.toString()">
  FROM app_sz_bbb a
</if>
<if test="computationRule == '2'.toString()">
  FROM app_ccc a
</if>

<choose>
   <when test="computationRule == '1'">
   FROM app_sz_bbb a
   </when>
   <otherwise>
     FROM app_sz_bbb a
   </otherwise>
 </choose>

<if test='computationRule == "1"'>
  FROM app_sz_bbb a
</if>
<if test='computationRule == "2"'>
  FROM app_ccc a
</if>

<if test="isBound != null and isBound !='' and isBound == '1'">
  and box_sid is not null 
</if>
<if test="isBound != null and isBound !='' and isBound == '2'">
  and box_sid is null 
</if>

<if test="isBound != null and isBound !='' and isBound == '1'.toString()">
  and box_sid is not null 
</if>
<if test="isBound != null and isBound !='' and isBound == '2'.toString()">
  and box_sid is null 
 </if>